Many HVAC professionals assume the leading cause of carbon monoxide (CO) poisoning is a cracked heat exchanger. This assumption leads to inaccurate test methods that pass on from technician to technician. They try to assure customer safety, but unknowingly rely on...
Flex ducts could be in imminent danger. A few months ago, I wrote about a recent proposal to severely limit the use of flexible (flex) ducts. Due to poor installation methods, the International Association of Plumbing and Mechanical Officials (IAPMO) is proposing to...
Flex duct versus metallic duct: for decades many considered duct material the key to how well an HVAC system delivers airflow to the conditioned space. You should start paying closer attention to this discussion. Events unfolding over the next few months could...
Twenty-two years ago NCI set out on a mission to help the HVAC industry move towards measured performance. At the time, we envisioned a future where most systems would perform at over 90% delivered efficiency. We believed the industry would fix most of the HVAC...
Beating the Comfort Commodity Challenge When it comes to comfort differentiation, HVAC manufacturers have it tough these days. The rapid pace of technological development means that no single manufacturer can maintain a competitive edge for very long. Each one invests...
