Articles by David Richardson

The revelation that many of these rules of thumb can get you into trouble, and also the need to comply with new code revisions, is accelerating the move toward using design software to meet industry standards.

Once the realization is made that the HVAC equipment is a component of the HVAC system and not the HVAC system itself, a contractor and homeowner can start to address the real issues. 

These temperature-related issues are often corrected simply by renovating the duct system to cure duct leakage and air-balancing issues, which created pressure-related problems in the building. There are instances, though, when you can have the perfectly designed and installed HVAC system and these temperature complaints still exist.

Is there a possibility that duct sealing could negatively affect an HVAC system? 

If you’re reading this article in a building that has a forced-air HVAC system in it, you’re sitting inside the duct system right now.

The Coanda Effect is named in honor of Henri Coanda, a Romanian aerodynamics pioneer and aircraft inventor. This phenomenon is sometimes referred to as the surface effect.

Are your customers really getting better performance as a result of your performance agreement, or are you just insinuating they are? 

The analog manometer, commonly referred to as a Magnehelic®, is a test instrument that has been around the HVAC industry for decades. 

How can the homeowner be comfortable with a piece of equipment that would condition twice the amount of house? The answer lies in the true performance of the HVAC system.

Are we using the most accurate metrics for determining duct leakage in a residential duct system? Would this be the best metric to use for quantifying duct leakage in residential duct systems?