Author Archives: David Richardson

David Richardson on the Art of Installing Test Ports

June 8th, 2016 | Posted by David Richardson in David Richardson - (0 Comments)

There is so much more to installing a static pressure testing port than meets the eye. It involves drilling – a scary thing for both your service technicians and homeowner customers. The art of installing these ports involves more than the hardware and technology required to do it. There is a psychology to it. It …
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Low HVAC Airflow Hurts TEV Operation

May 11th, 2016 | Posted by David Richardson in David Richardson | Home - (0 Comments)

The Thermostatic Expansion Valve (TEV) has become the refrigerant metering device of choice for most HVACR manufacturers in the past decade. Over time, countless valves have been needlessly replaced because of low airflow affecting their operation. A basic understanding of TEV operation helps tie the effects of low airflow to proper operation of the valve. …
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Confronting A Restrictive HVAC Air Filter

May 11th, 2016 | Posted by David Richardson in David Richardson | Home - (0 Comments)

It is often taught that to diagnose a restrictive air filter is as simple as a visual inspection to see if it’s plugged. Then, if the filter is dirty, replace it. Once this obvious defect is fixed, everything is assumed to work correctly. Could there be more to it? What if the new air filter …
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  In Boone North Carolina last week an 11 year old boy was found dead in a hotel room from carbon monoxide poisoning. Just two months prior to this, an elderly couple was found dead in this exact same room, yet no action was taken. This incident has been getting national media attention similar to …
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