Chances are high that you’ve encountered disastrous equipment replacement jobs you’d love to forget. Whether it’s the customer who now has high humidity issues, or the system that can’t maintain temperature anymore — we’ve all experienced them. In many of these occurrences, attention to detail and avoiding bad industry habits helps prevent the occasional catastrophic …
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If you talk to anyone experienced in measuring static pressure, they will admit they’ve dealt with inconclusive and goofy readings that didn’t make sense. This typically results in a frustrating, but rewarding day, because they learned something they won’t forget. Most questionable readings start with overlooking and/or ignoring static pressure measurement basics. To refresh your …
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One of my favorite fictional characters growing up was Sherlock Holmes. Holmes was an extraordinary detective with a gift for finding clues of a mystery others completely missed. His confidence, observational skills, and attention to detail added an extra appeal to the stories. Little did I know the qualities of Sherlock Holmes would apply to …
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4 Obstacles

Carbon monoxide (CO) poisoning is one of those scary issues that most HVAC professionals hope to never encounter. As with many frightening things we want to avoid, this doesn’t make those issues go away. The threat is very real even though a blind eye is often turned to it. With all the stories and reports …
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Air filters create resistance to airflow that can reduce a fan’s ability to move air by up to 50%. You can evaluate the filter’s impact on airflow by measuring the pressure drop over it. It takes less than a minute to do. It is often the diagnostic test that identifies the problem in nearly one …
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Measure TESP in HVAC Two-Piece Air Handlers

What makes modular or two-piece different from their single-piece cousins when it comes to measuring total external static pressure (TESP)? In this article we’ll examine the differences and discuss how to measure TESP correctly. “As-Shipped” The “As-Shipped” idea is helpful when measuring the TESP of two-piece air handlers. So, what do you find when you …
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Testing HVAC Static Pressure

I hear a lot of reasons for taking static pressure measurements on every service call. One of the most common is that it takes too long — there isn’t enough time on a call to do it. Let’s face it, technicians have a lot of responsibilities and measuring static pressure adds to them. What if …
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Many technicians who work on fuel-fired equipment will admit they’ve singed their eyebrows when watching a burner light. It’s a rite of passage among most seasoned technicians. What if there was a safer way to check ignition instead of sticking your face in front of a burner? Fortunately, there is, and it involves using a …
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Chances are high that you’ve encountered disastrous equipment replacement jobs you’d love to forget. Whether it’s the customer who now has high humidity issues, or the system that can’t maintain temperature anymore — we’ve all experienced them. Indeed, in many of these occurrences, attention to detail and avoiding bad industry habits helps prevent the occasional …
Read more

Visual Clues to HVAC Comfort Defects

Many homeowners across the U.S. live in uncomfortable conditions. Sadly, most are convinced it’s normal. As an HVAC contractor, there are some common steps you can take to deal with their discomfort, and make conditions much more bearable. If you know what to look for, you can easily see the signs. Let’s look at the …
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