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When Joaquin Contreras decided to make a career change nearly 28 years ago, he wasn’t quite sure where it would all lead. But an opening in the purchasing department of a large new construction HVAC company seemed like the right opportunity at the right time. He...
by National Comfort Institute, Inc.
John's Refrigeration has served the cooling needs of the community of Mesa, Arizona since 1970. Andrew John, the company's vice president, is the Chief Airhead of the group. Andrew owns the company with his brother Steven and his Dad, Chris who is in the process of...
It's amazing how many contractors are still looking for a "Silver Bullet" solution to mold. Ideally we would have some magical pixie dust you sprinkle on a home or building to make it mold-proof, or better yet, to cure all existing mold issues forever. In this attempt...
by Jim Davis
Spill switches provide additional safety whenever barometric dampers have been installed on equipment by sensing heat that may spill from the flue. If the flue becomes blocked, or if the negative pressure in the room causes the chimney to back draft and begin...
by Jim Davis
Combustion air testing is performed using a draft gauge and a CO analyzer. When the draft in the flue of an appliance is low or below -.01" to -.02" W.C. and when CO reading are rising, combustion air problems are present. Carbon Monoxide diagnostics consistently...
by Jim Davis
The procedure and purpose for adjusting barometric dampers for gas appliances is completely different from the reason you adjust barometric dampers on oil equipment. Let's take a look at each method to get a clearer picture of what we're trying to accomplish. OIL...
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...
by National Comfort Institute, Inc.
There's nothing more frustrating than not being able to balance a system when it was built without balancing dampers, and the plenum and take-offs are behind a finished ceiling. Here's a little trick we use to install dampers on critical ducts in finished basement...
Adding the ducts to your service agreements is one of the best steps you can take to move your company forward in implementing air diagnostics. It's a small thing that can bring great and immediate results. Spring is the perfect time to implement this new service....
NCI contractors have been testing and renovating duct systems for nearly a dozen years now. Every few years, we review the procedures and forms we provide to support your duct renovation work so they can be upgraded to keep up with the evolution of Performance Based...
