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The Problem with Open Filter Racks

A common installation encountered by many Performance-Based contractors is the use of open filter racks. Open filter racks are installed to allow for easy filter access by exposing an inch or so of the filter. The problems with this accessory are that it creates a...

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What Can Sir Isaac Newton Teach Us about Duct Renovation

What Can Sir Isaac Newton Teach Us about Duct Renovation by David Richardson When Sir Isaac Newton’s name is mentioned, many of us think of him getting hit in the head with an apple and discovering gravity. However, Newton can be credited with much more than this....

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Magnehelic® Fundamentals

The Magnehelic® is the go-to test instrument for many NCI-trained technicians for measuring static pressure. This test instrument has been around the HVAC industry for decades and is still the test instrument of choice for many. In this article, we explore the basics...

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Low Airflow and Thermostatic Expansion Valve Operation

Low Airflow and Thermostatic Expansion Valve Operation by David Richardson The effects of low airflow on the performance of an HVAC system have been taught by NCI for decades. One of the topics we don’t discuss as frequently is the relationship The effects of low...

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Is HVAC System Duct Leakage Testing Enough?

Is HVAC System Duct Leakage Testing Enough? by David Richardson Duct leakage is an issue that has challenged the HVAC industry for as long as duct systems have been installed. The concept of resolving duct leakage issues isn’t a new one. If you have seen some of the...

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Interior Doors and Intermittent HVAC Comfort Problems

Interior Doors and Intermittent HVAC Comfort Problems by David Richardson This cooling season, HVAC professionals across the country will be called upon to solve intermittent comfort problems they can't recreate. These frustrating and random problems often involve...

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Five Airflow Rules You Need to Know

Five Airflow Rules You Need to Know Troubleshooting the airside of an HVAC system can be one of the most frustrating, yet rewarding challenges you'll have in this industry. Airflow is at the core of what we do -- yet it's one of the most misunderstood aspects of an...

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Interior Doors and Intermittent HVAC Comfort Problems

Interior Doors and Intermittent HVAC Comfort Problems by David Richardson This cooling season, HVAC professionals across the country will be called upon to solve intermittent comfort problems they can't recreate. These frustrating and random problems often involve...

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Five Airflow Rules You Need to Know

To understand airflow, you need to have a firm grasp of the rules driving airflow characteristics and behaviors. What you’ll find is many of the most complicated issues you encounter often tie to an airflow problem. Let’s look at five airflow rules that can help you master the airside of your profession.

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David Richardson

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