When you work in the HVAC field, you need to have a wide range of skill sets because heating and cooling systems require you to know everything from plumbing to electricity. But one of the things that not many people discuss is just how important it is for a tech to know how to work with galvanized sheet metal.

Galvanized sheet metal is what is used to make the ductwork for every HVAC system, and because every installation is unique, an installer needs to know how to cut and work with the material, so they can fabricate a network of ducts that are leak-proof and capable of delivering forced air efficiently throughout the structure.

Since so much of your time on the job will involve working with galvanized sheet metal, this post will serve as an introduction to the metal, so you can have a better understanding of why it is used and how to get the best results from it.

 

What is Galvanized Sheet Metal?

Galvanized sheet metal is a sheet of steel that has been coated in zinc to make it resistant to corrosion. Because steel is made of iron, it will quickly rust when exposed to moisture, and over time that rust will corrode the steel to the point of failure.

By coating the steel in a layer of zinc, a barrier is formed between the sheet metal surface and external environment. This prevents corrosion and rusting and allows the metal to be used in a variety of environments, including harsh weather conditions. Galvanized sheet metal is so durable and long-lasting that it is used not only in HVAC ductwork and throughout the construction industry, but also in the automotive industry, the electronics industry, power generation and communications, food processing, and in road construction, among others.

 

How is Sheet Metal Galvanized?

Steel sheet metal can be galvanized using a few different techniques. These include:

• Hot-dip galvanizing: This is a popular technique that has been used for more than 100 years, and it involves submerging the sheet metal in molten zinc. Of all the techniques, hot-dip galvanizing is the most economical, reliable, and durable way to galvanize steel sheets.
• Electrogalvanizing: This type of galvanization relies on electroplating. The electroplating technique bonds the zinc layer to the surface of the sheet metal. This allows for a very thin and accurate layer of protection that also has a better surface finish.
• Sherardizing/Dry galvanization: This technique involves heating fabricated sheet metal parts in a rotating drum with metallic zinc. As the zinc dust evaporates, it will diffuse into the sheet metal. This is ideal for sheet metal parts that have already been fabricated and require zinc coating on its inner section.
• Thermal spraying: Thermal spraying involves spraying the surface of the sheet metal with a coating of zinc. As the zinc particles land on the sheet metal, they flatten and adhere to the surface. The sheet metal is then heated to complete the galvanization.

 

Galvanized Sheet Metal Fabrication Considerations

Working with galvanized sheet metal is an art form that can take some time for an HVAC technician to perfect. This is because the metal can be difficult to work with for those with little experience and problems can arise when bending or welding it.

For instance, when someone without the proper training bends galvanized sheet metal, it can be common for them to experience cracks in the galvanization. In fact, even experienced HVAC techs can have this happen to them from time to time. When this occurs, there are two options for you to consider – you can repair the cracked sections, or use more advanced sheet metal galvanization techniques.

Likewise, welding galvanized sheet metal can sometimes present challenges. In many cases, it can be difficult to achieve a consistent and uniform weld on galvanized sheet metal. Your only option here is to closely monitor the entire welding process to ensure compatibility. Or, you may need to fabricate the ductwork sections and galvanize them later, but quite often that isn’t possible.

Another potential problem that you might run into when fabricating galvanized sheet metal is surface distortion and warping. When this occurs, it is usually indicative of a problem in either the fabrication’s design or the sheets being used aren’t uniform in thickness. When you are using a proper design and fabricating sheet metal parts with uniform thickness and symmetrical designs, you will be able to significantly reduce or even eliminate surface distortion or warping.

 

Master the Art of Galvanized Sheet Metal Fabrication

 

It’s one thing to learn about galvanized sheet metal, but if you want to work efficiently with the material in your HVAC career, then enrolling in BTrained’s Metal Duct Design & Fabrication Workshop will help you master the art of duct fabrication. This comprehensive three-day program is specially designed to provide you with the education and hands-on experience you need to improve your skills in this vital part of your job responsibilities as a professional HVAC installer.

BTrained can help you become the best HVAC tech you can be. Since each of our training courses have a limited number of seats available, they tend to fill up quickly, so it’s recommended to claim your spot early. Enroll today and secure your spot.

The HVAC job market is consistently strong because heating and cooling systems are found in just about every residential, commercial, and industrial structure known to man. As a result, quality HVAC technicians are always in high demand, and the most experienced have the potential of earning upwards of $90,000 per year.

But while you might think that the only skills needed to be an HVAC tech are the abilities and education needed to install, maintain, and repair refrigeration, cooling, heating, and ventilation systems, there are several other skills that one should have if they desire to pursue a career in this lucrative field.

Here are seven skills that every capable HVAC tech should have if they want to enjoy long-lasting success in this job market.

 

#1: Good Customer Service Skills

HVAC techs spend a lot of time communicating with customers. From discussing their heating or cooling problems to answering their questions to dealing with irate clients, how you handle yourself when you are working with your customers will have a big impact on how confident they will be in your abilities and ultimately, their satisfaction level.

As you might expect, if you don’t have good customer service skills, then you could find yourself competing for fewer and fewer jobs, or if you work for a company, then your boss may start getting complaints about your attitude. If you’re not a “people person,” then being an HVAC tech might not be for you.

 

#2: Problem-Solving Skills

HVAC techs don’t get called whenever HVAC systems are running properly. If a tech gets a call, it’s because there’s something wrong with someone’s heating or cooling system and it’s the tech’s job to find out what it is and fix it. But having the education that’s required to fix something is not the same thing as knowing how to problem solve and troubleshoot the problem.

The best HVAC techs have an innate ability to work through the potential issues to get to the crux of the problem. In HVAC, there can be many different potential causes for some symptoms, so having the skills to patiently troubleshoot the case is extremely important to getting the system back up and running quickly.

 

#3: Flexibility

Professional HVAC techs are almost always on call. So, flexibility is an absolute must if you want to maximize your earning potential in this field. When you work in HVAC, you should always expect the unexpected, like a customer calling you at 3 a.m. during a raging snowstorm because their heat stopped working.

A career in HVAC is not for the faint of heart. If you prefer working 9 to 5 with weekends off, then there are other careers that you might be better suited for.

 

#4: Good Time Management Skills

As an HVAC tech, you need to manage your time well, especially if you want to run your own business one day. Every tech needs to be able to maintain a schedule that will allow them to service multiple customers per day because providing timely service is essential for enjoying longevity in this career. If you don’t show up on time, then your customer will waste no time in calling someone else.

So, if you’re someone who just can’t get out of bed when the alarm rings or you always show up late for appointments and meetings, then you probably aren’t going to have the time management skills needed to be successful in the HVAC job market.

 

#5: Detail Oriented

Every HVAC system features a complex network of wires, pipes, fixtures, and other components, and each piece needs to be handled and connected precisely for the system to work. As a result, being detail-oriented is extremely important for a career in HVAC. Attention to detail is also an essential trait to have when it comes to maintaining accurate records of the work you performed.

 

#6: Good Organization Skills

Because HVAC involves a variety of different trades, including plumbing, electric, and occasionally carpentry, an HVAC tech’s work van can be filled to capacity with a lot of different tools and equipment. So, having good organizational skills is a must if you want to keep your van clean and ensure that everything is easy to locate.

On the other side of that coin, if you aren’t a well-organized individual, then you will have a higher risk of having jobs take longer to complete simply because you can’t find the right piece that you need. Or, your customer may simply change their mind the moment they see the untidy mess inside of your van.

 

#7: Good Physical Health

This isn’t so much a skill, but it is included here because working in HVAC can be physically demanding. Therefore, being in reasonably good physical health will allow you to perform your work easier and safer.

It’s not uncommon for HVAC techs to work in tight spaces while maneuvering heavy objects, equipment, and machinery. The job requires a lot of stamina and strength, as well as good flexibility, range of motion, and hand/eye coordination.

 

If You Have the Skills to Be in HVAC, Then BTrained Can Provide the Education

If you have what it takes to be a good HVAC technician but you’re lacking the education, then BTrained’s HVAC Training Courses can help you reach your goals. Our courses are specially designed to provide you with the education and hands-on experience you need to qualify to sit for the Alabama HVAC Contractors Exam and start earning an income in this fun and highly rewarding field.

An exciting new career is waiting for you. Since each of our training courses have a limited number of seats available, they tend to fill up quickly, so it’s recommended to claim your spot early. Enroll today and secure your spot. You can be starting a brand new career in HVAC in as little as two weeks!

If you are thinking about pursuing a career in HVAC installation and maintenance, then you’re making a smart decision. You’ll be entering a profession that is projected by the U.S. Bureau of Labor Statistics to grow by 6% over the next decade, which is much faster than the average. When you stop and think about it, it’s not hard to understand why HVAC techs are in such high demand. After all, there’s not a residential, commercial, or industrial property that doesn’t require some degree of heating and/or cooling.

But before you can enjoy a successful career in HVAC, you first need to receive the right type of training. Heating, ventilation, and air conditioning equipment is extremely complex and delicate, not to mention expensive, so you need the skills necessary to perform your job properly and safely.

At BTrained, we provide the ultimate HVAC learning experience that can help you get started in this highly rewarding and lucrative field. With a variety of training courses available, we make it easy for you to get trained in HVAC installation and maintenance in a manner that conforms to your lifestyle and schedule.

In this post, you will learn more about HVAC training and what to expect from your experience. The topics we will cover will include:

• What is HVAC training?
• Different types of HVAC training courses
• How to choose the right HVAC training course for you
• Benefits of HVAC training
• HVAC jobs and salaries

 

What is HVAC Training?

HVAC training is a training course that provides you with the knowledge and hands-on experience that you will need to have when entering the HVAC field. Once your training is completed, you will be eligible to sit for the HVAC Certification Examination.

Gaining HVAC certification is important because it ensures prospective employers and customers that you are knowledgeable, trained, and professional, thus making you a highly attractive job candidate.

Over the course of your HVAC training program, you will learn the basics of the heating and air conditioning industry, with topics including:

• Basic Refrigeration
• Basic HVAC Components and Functions
• HVAC and the Environment
• Everyday Skills and Techniques
• Metallurgical Science and Practice
• Systems and Sizing
• Properly Sized Duct Systems
• “All About Air”
• System Charging & Vacuum
• Soft Skills for Customer Relations
• Electrical Safety, Controls, and Wiring
• Finishes Touches for Technicians

Modern HVAC systems need to be carefully configured for the spaces they are being installed in, so they can operate as efficiently as possible. There is no one-size-fits-all solution in HVAC because every space is different. Therefore, it takes a lot of skill and experience to size a system properly.

As part of your HVAC training, you will learn how to adequately size an HVAC system based on a variety of different factors and design a ductwork system that will ensure maximum airflow throughout any given floor plan.

 

Different Types of HVAC Training Courses

BTrained offers a variety of different HVAC training courses and exam prep seminars, so you can choose the right type of learning experience for your unique needs. Our catalog of training courses includes:

• HVAC B-Elite 12-Week Night Courses
• HVAC B-Elite Express 2-Week Courses
• HVAC Metal Duct Design & Fabrication
• Custom HVAC Courses for Employers
• BPrepared HVAC Exam Prep Seminar

The HVAC B-Elite 12 Week Night Course is a 12-week course of study featuring classes twice a week (no weekends) from 6:00 pm to 10:00 pm. This course is approved by the Alabama HACR Board as a Pre-Examination Curriculum, allowing graduates to qualify to take the certification examination.

The HVAC B-Elite Express 2 Week Course is designed for the individual who wants to get on the fast track to a career in HVAC. This course features classes five times per week, Monday through Friday, from 7:00 am to 5:00 pm. It covers all the same topics as the 12-week course but in an intensive 2-week program. This course is also approved by the Alabama HACR Board as a Pre-Examination Curriculum, allowing graduates to take the certification examination.

The HVAC Metal Duct Design & Fabrication course is specially designed to help you take your duct fabrication skills to the next level. This is a 3-day weekend course of study featuring classes that run from 8:30 am to 4:30 pm. The topics covered in this training course include:

• Designing & Fabricating Common Duct Transition Fittings
• Transition Fittings for Change-Outs
• Designing & Fabricating Square to Rounds
• Safe Handling of Galvanized Sheet Metal
• Proper use of Fabrication Tools
• Systems and Sizing
• Personal Instruction on Proper Fabrication
• Hands-On Workshop

BTrained can also create custom courses for HVAC companies that are looking to train or certify multiple employees all at once. For example, we can create a customized 2-week B-Elite Express program just for your team, a specialized exam prep course for your team, or any other specific training program you need to ensure your team has the skills necessary for performing exceptional work.

If you have completed your initial HVAC training and want to increase your chances of passing the Alabama HVAC Contractors Exam, then enrolling in BTrained’s BPrepared HVAC Exam Prep Seminar will help. This is an intensive 2-day seminar that is designed to ensure that you are prepared for your upcoming exam by providing you with successful test techniques, a practical book review, sample questions, and a sample practice exam.

 

How to Choose the Right HVAC Training Course For You

Since both of our BElite HVAC training courses deliver the same quality information and carry the same price point, your choice will most likely be determined by which program fits best within your current schedule and lifestyle.

For example, if you are in an HVAC apprenticeship or working another job in which you have regular working hours during the day, then taking the 12-week BElite Training Course will fit your life best because you can take your classes at night. Or, if you want to change careers quickly or start on the path of a career in HVAC right after high school graduation, then choosing the 2-week BElite Training Course will help you gain the skills you need to pursue your new profession much more quickly.

Depending on how much time has passed since you completed your HVAC training course, you may want a refresher before tackling the Alabama HVAC Contractor Exam. If this is where you are at in your career journey, then enrolling in the Exam Prep Seminar will be your ideal course of action.

Meanwhile, our HVAC Metal Duct Design & Fabrication course is for those who are already working in the field but want to enhance their skills and improve their understanding of this extremely important component of the HVAC industry. 

Another factor that can come into play in choosing your ideal HVAC training course is location. BTrained offers both the 12-week and the 2-week BElite training courses at our Birmingham and Huntsville campuses, but the Duct Design & Fabrication course and the BPrepared HVAC Exam Prep Seminar are only available at our Birmingham campus.

 

Benefits of HVAC Training

A sizable part of becoming a top-tier HVAC technician occurs on the job because that is where you will eventually be exposed to the equipment and situations that you will need to experience to hone your skills. As a result, some may be convinced that they can learn everything they need to know about HVAC on their own but this is simply not the case.

Heating and cooling systems are among the most complex systems designed by man. To work competently and safely, you need to know how to work with electricity in a range of voltages, install plumbing, ensure proper ventilation, calculate airflow and vacuum, and much more. These skills are best learned in a classroom setting under the careful guidance of an experienced instructor.

An HVAC training course is a safe space where you can work through problems in a supportive environment instead of on the job, where a simple wiring mistake can cause a major problem for both your customer and your employer.

In addition, you need to complete an approved HVAC training program before you can even qualify to sit for your Alabama HVAC Contractors Exam. If you attempt to learn the HVAC profession solely by working alongside an HVAC technician, then you will never be able to gain the certification you need to secure work as a certified HVAC tech.

Completing HVAC training gets you started in a career that is essentially future-proofed. The world will always need heating and cooling, so there will always be work available for highly qualified technicians. Plus, you can take your skills with you wherever you go, even overseas, thus increasing your opportunities even more.

For those with enterprising spirits, completing an HVAC training program provides them with skills that they can use both on the job and off. Many certified HVAC technicians work for companies during the day and then accept lucrative side jobs at night or over weekends. And during the summer and winter months, there are always plenty of opportunities to earn more money thanks to the massive increase in demand.

What many may not even consider is that there is also a strong sense of satisfaction that comes with being a certified HVAC technician. The work you do not only helps make your customers more comfortable, but it also saves lives and protects property. Having the skills required to keep an HVAC system running properly will allow you to help your clients save money on their monthly utility bills and avoid potential disasters.

With the foundation provided by your education in the field, you can even discover fun and rewarding ways to branch out from your initial career path. For instance, you can become a “wellness coordinator” who advises businesses on their HVAC systems and provides them with ways to increase the health, wellness, and productivity of their employees. With your HVAC training, your possibilities for earning money are only limited by your imagination.

 

HVAC Jobs & Salaries

In 2022, the Bureau of Labor Statistics reported that the national median pay for HVAC mechanics and installers was $24.71 per hour, or $51,390 per year. Those fresh out of school or with less than one year of experience tended to earn around $22.47 per hour. Meanwhile, technicians with over 10 years of experience earned an average of $32.83 per hour.

That said, every state is different. States like California, Alaska, Hawaii, Washington, Massachusetts, and Connecticut have noticeably higher HVAC wages to coincide with the extraordinarily high cost of living in those areas. In Alabama, the median pay is $41,340 with the top 10% of HVAC technicians earning an average of $62,640 per year. The bottom 10% earn an average of $26,490 per year.

In the HVAC industry, experience is the largest driver in determining how much an HVAC technician can make with the field having three experience levels - Entry/Min-Level, Senior, and Manager. Entry/Mid-Level is what technicians with zero to five years of experience are considered, while a Senior technician is someone with six to nine years of experience. A Manager is the highest paid level, with these individuals having at least ten years of experience working in the field.

One way an HVAC technician can increase their salary potential is by continuing their education and acquiring additional certifications. Some of the certifications that can help improve a tech’s salary potential include:

 

EPA 608 Certification‍

The EPA 608 Certification is required by the EPA for HVAC technicians in every state.

 

NATE Certifications

NATE Certifications are not required, but acquiring them demonstrates your knowledge of a given skill, both to clients and employers. These certifications include:

 

The Ready-to-Work Certificate 

The NATE Ready-to-Work Certificate is designed for the entry-level technician who has little to no experience or background knowledge. The exam covers information regarding the basic fundamentals of the HVAC industry.

 

HVAC Support Technician Certificate

The NATE HVAC Support Technician Certificate shows an understanding of topics that will be covered in the professional level certification but at a more fundamental level. It is designed for techs who have six months to a year of experience in the HVAC industry.

 

NATE Certification

NATE Certification is recommended for technicians who have worked in HVAC for two or more years. This is NATE’s main certification and after this, you’ll receive a certificate, a wallet card, and a patch, along with your information stored in their internal bank for contractors to look up and confirm your completion as well. This Certification can be acquired in one of two ways - by completing the Traditional Pathway, which includes a core exam and a specialty exam in your field of choice, or by completing NATE’s Certified HVAC Professional (CHP-5) exams.

 

Traditional Core and Specialty Exam

The Traditional Pathway of the NATE Certification includes two exams. The first is the core exam, which contains 50 questions in the areas of general knowledge, construction knowledge, and HVAC-specific knowledge. The second is the Specialty exam, which is broken into two groups, installation specialties and service specialties. You choose the specialty exam that you’d like to be certified in, which can include:

 

Installation Specialities

• Air Conditioning
• Air Distribution
• Air-to-Air Heat Pump
• Gas Heating (Air)

 

Service Specialties

• Air Conditioning
• Air Conditioning - Spanish
• Air Distribution
• Commercial Refrigeration
• Heat Pump (Air to Air)
• Heat Pump (Air to Air) - Spanish
• Gas Heating (Air)
• Gas Heating (Air) - Spanish
• Hydronics Gas
• Hydronics Oil
• Light Commercial Refrigeration
• Oil Heating (Air)

 

Certified HVAC Professional (CHP-5)

The NATE Certified HVAC Professional (CHP-5) is an alternative route to gaining your NATE Certification. This includes the completion of five exams, with one each focusing on the following subjects:

• • HVAC Fundamentals
  • Electrical and Controls
  • Comfort and Airflow
  • Installation
  • Service

 

Senior Level Efficiency Analyst Certification‍

The NATE Senior Level Efficiency Analyst Certification is for HVAC technicians who have more than five years of experience and have acquired at least two NATE specialty certifications. ‍

 

HVAC Excellence

HVAC Excellence offers progressive levels of certification that serve to distinguish a technician’s knowledge and skill level as they advance in their career.

 

Get Started On the Path to an Exciting and Lucrative Career in HVAC

Imagine having a career that not only garners instant respect but one that also provides a comfortable salary with endless profit-boosting opportunities. As an HVAC technician, you will be entering a fun and rewarding profession where your skills will always be in high demand.

The best thing you can do when starting your journey toward your new career is to get the education and hands-on experience that only comes from being trained by the experts. The importance of your training cannot be overstated because your education will serve as the foundation for everything that comes after.

By enrolling in one of BTrained’s HVAC training courses, you will gain all the skills you need to qualify to sit for the Alabama HVAC Contractors Exam and start earning an income in this future-proof field. But you don’t want to wait. Each of our training courses has a limited number of seats available, and they fill up quickly. Enroll today and secure your spot. You can start your exciting new career in as little as two weeks!

While the standard residential forced air HVAC system consists of both a furnace and a central air conditioner, neither would be able to do its job of making the home’s interior more comfortable without ductwork. HVAC ductwork is the network of ducts that deliver warmed or cooled air throughout the home, so to say that it is an important part of any HVAC installation would be an understatement.

In truth, ductwork design and fabrication is one of the most important skills an HVAC technician needs to develop because if a ducting system is poorly configured, then a significant percentage of the home’s energy will be wasted. How much? The potential for energy losses caused by bad duct design can reach as high as 40 percent!

At BTrained, we offer Metal Duct Design and Fabrication Workshops that can help you take your skills to the next level. In this post, you will learn more about the importance of duct design and how this course of study can help you become the best HVAC technician you can be. Some of the topics that will be covered include: 

• What is metal duct design?
• Benefits of metal duct design
• How to design metal ducts
• Metal duct design codes and standards
• Metal duct design software

 

What is Metal Duct Design?

Metal duct design involves several processes, including sizing, planning (laying out), placement, and detailing of the ducts, which includes sealing and insulating. Once installed, the final process involves finding and fixing any pressure losses throughout the network of ducts.

The sizing phase of HVAC ductwork design is one of the most important because you need to make sure that the ducts are large enough to carry enough air to heat or cool the home. If a heating and cooling system is installed with ducts that are too small, airflow will be restricted and this will have a negative impact on the system’s efficiency and its ability to keep the home comfortable.

The planning phase of metal duct design is also known as the configuration phase. This is when you will determine which type of layout will work best within the space you have for installation. The two most common configurations are the “radial” and “trunk and branch” designs. In the radial configuration, the heating and/or cooling unit is located in the center and its supply and return ducts radiate outward, like the tentacles on an octopus. A trunk and branch set-up, on the other hand, is designed like a tree, with large ducts extending outward from the central unit and smaller supply and return ducts extending out from the larger ducts.

Ductwork placement is another important topic of discussion because where you install the ductwork, and where you do not, are just as important as sizing the system properly. For instance, you want to avoid running ductwork systems through unconditioned areas of the home, such as through crawl spaces or attics, as these areas will result in greater energy loss. Ducts should be placed in conditioned spaces whenever possible because this will improve efficiency and less energy will be lost.

Detailing the ductwork involves ensuring that all connections at the sections, joints, and elbows are snug, and then sealing each seam with mastic sealant or metal tape. This will help prevent air leaks and improve overall efficiency.

In cases where the ductwork must be installed in an unconditioned space, then it needs to be insulated using at least R6 insulation, although R8 is preferred. The ductwork that runs through the home’s conditioned spaces should be insulated using R4 insulation.

 

Benefits of Metal Duct Design

The ducts used in HVAC are usually made from either galvanized steel (with a zinc coating) or aluminum and they can be round, oval, or rectangular. Sheet metal is the ideal material for an HVAC system because it is not only readily available, but it is also the most durable, rustproof, and least likely to harbor mold. This means that once metal ductwork has been installed, it will last for decades without requiring much in the way of maintenance or repair. Even in cases where a furnace needs to be replaced, the existing ducts can simply be connected to the new furnace.

Another key benefit of metal duct design is that these systems can easily be configured for any floor plan regardless of how many levels the home may have. When the appropriate tools are used, metal ducts are easy to cut and splice together. This also makes it very easy to expand the ductwork should the home undergo renovations or add additional living space.

Since these systems are made from metal, they are non-combustible. This means that if a fire should break out in one part of the home, the fire will not spread through the building via the HVAC ductwork. Metal is also the most hygienic choice for HVAC system air delivery because it is so easy to clean and maintain compared to other options, like fiberglass or flexible ducts.

 

How to Design Metal Ducts

During the three-day Metal Duct Design and Fabrication Workshop, you will learn everything you need to know about designing and fabricating metal ducts on a professional level. You will learn how to create common duct transition fittings, including transitions from square ducts to round ducts, as well as safe cutting and handling techniques, and the proper use of fabrication tools.

When designing metal ducts, there are certain factors that you will need to take into consideration, including the capacity of the ductwork, air distribution, and restrictions. Ductwork capacity is important because you want airflow pressure to be consistent throughout the home. Distributing air evenly is also important or else you could have a home with one room that is substantially colder or warmer than the rest. This will also create a lopsided system which could eventually result in efficiency problems.

Restrictions also need to be kept to a minimum because air will always take the path of least resistance. Where there are restrictions, air will be diverted elsewhere, resulting in unbalanced airflow distribution. Using metal ducts instead of flexible ducting is therefore usually recommended because flexible ducts need to be properly supported, so it doesn’t have any kinks that could interfere with airflow.

Because the design of a metal duct system needs to be balanced, it should only be designed by a professional with the appropriate knowledge and experience. While most HVAC technicians should be able to install metal duct systems, designing one that guarantees system balance and equal air distribution is something that requires a deeper understanding of how ducts work. By completing BTrained’s Metal Duct Design and Fabrication Workshop, you will gain the knowledge and skills you need to add this valuable skill to your wheelhouse.

 

Metal Duct Design Codes and Standards

Each HVAC installation is unique. Factors that can impact an installation include the size and location of the building, the thermal integrity of the facility, the timeline and budget for the project, and more. But throughout any installation, the one component that you must pay close attention to is ensuring that the installation complies with appropriate regulations and building codes.

Installing an HVAC system that isn’t up to code can result in you or your employer being subject to costly fines and penalties. It will also result in a lot of wasted time and resources because you will need to go back and correct the installation to make it compliant.

This is why it is so important to know what the building codes are before you start a project. While there is no national code that applies to HVAC duct installation, states and local municipalities usually do have construction codes for HVAC. For instance, in Alabama, new and replacement ductwork must comply with Sections 6.4.4.1 and 6.4.4.2 of the state’s building code. The codes are included below:

6.4.4.1 Insulation

• 4.4.1.1 General
  • Insulation required by this section shall be installed in accordance with industry-accepted standards (see Informative Appendix E). These requirements do not apply to HVAC equipment. Insulation shall be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind, but not limited to the following:
    • Insulation exposed to weather shall be suitable for outdoor service, e.g., protected by aluminum, sheet metal, painted canvas, or plastic cover. Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation that can cause degradation of the material.
    • Insulation covering chilled-water piping, refrigerant suction piping, or cooling ducts located outside the conditioned space shall include a vapor retardant located outside the insulation (unless the insulation is inherently vapor retardant), all penetrations and joints of which shall be sealed.

• 4.4.1.2 Duct and Plenum Insulation
  • All supply and return ducts and plenums installed as part of an HVAC air distribution system shall be thermally insulated in accordance with Tables 6.8.2-1 and 6.8.2-2.
  • Exceptions:
    • Factory-installed plenums, casings, or ductwork furnished as a part of HVAC equipment tested and rated in accordance with Section 6.4.1.
    • Ducts or plenums located in heated spaces, semi heated spaces, or cooled spaces.
    • For runouts less than 10 ft in length to air terminals or air outlets, the rated R-value of insulation need not exceed R-3.5.
    • Backs of air outlets and outlet plenums exposed to unconditioned or indirectly conditioned spaces with face areas exceeding 5 ft2 need not exceed R-2; those 5 ft2 or smaller need not be insulated.

6.4.4.2 Ductwork and Plenum Leakage

• 4.4.2.1 Duct Sealing
  • Ductwork and all plenums with pressure class ratings shall be constructed to Seal Class A, as required to meet the requirements of Section 6.4.4.2.2, and with standard industry practice (see Informative Appendix E). Openings for rotating shafts shall be sealed with bushings or other devices that seal off air leakage. Pressure-sensitive tape shall not be used as the primary sealant unless it has been certified to comply with UL-181A or UL-181B by an independent testing laboratory and the tape is used in accordance with that certification. All connections shall be sealed, including but not limited to spin-ins, taps, other branch connections, access doors, access panels, and duct connections to equipment. Sealing that would void product listings is not required. Spiral lock seams need not be sealed. All duct pressure class ratings shall be designated in the design documents.
• 4.4.2.2 Duct Leakage Tests
  • Ductwork that is designed to operate at static pressures in excess of 3 in. wc and all ductwork located outdoors shall be leak-tested according to industry-accepted test procedures (see Informative Appendix E). Representative sections totaling no less than 25% of the total installed duct area for the designated pressure class shall be tested. All sections shall be selected by the building owner or the designated representative of the building owner. Positive pressure leakage testing is acceptable for negative pressure ductwork.The maximum permitted duct leakage shall be:
    • Lmax = CLP0.65
      • where:
      • Lmax = maximum permitted leakage, cfm per 100 square foot of duct surface area
      • CL = 4, duct leakage class, cfm per 100 square foot of duct surface area per in. of water 0.65
      • P =test pressure, which shall be equal to the design duct pressure class rating, in. of water

The Metal Duct Design and Fabrication Workshop provides you with a better understanding of these codes and standards and how they apply to your day-to-day work.

 

Metal Duct Design Software

Today, HVAC installation technicians have a trove of digital resources at their disposal that can help make designing custom metal duct systems quicker and easier. During your time in BTrained’s Metal Duct Design and Fabrication Workshop, you will learn about the variety of different software programs available that are designed to help you improve the efficiency of your results.

But as helpful as these resources can be, nothing beats having a solid educational foundation and practical hands-on experience. At BTrained, we provide you with both, so when you complete your workshop, you will be prepared to include duct design in your repertoire of skills.

 

Master the Art of Metal Duct Design in Just Three Days!

Three days is all it takes for the HVAC experts at BTrained to provide you with a greater understanding of how to design and fabricate metal duct systems. This is a valuable skill that the highest-paid technicians in the field have, so if you want to take your career to the next level, then this workshop will help get you there.

These workshops are limited in number and seat availability is purposefully kept low to maximize individual instruction, so if you want to attend an upcoming workshop, don’t delay. Enroll today to secure your seat and get the skills you need to further your career in HVAC.