NCI Article Library

High-Performance HVAC Resources

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...

If You Don’t Measure, You’re Just Guessing

If You Don't Measure, You're Just Guessing by David Holt, NCI Director Sales & Service Leadership I’m a huge college football fan. When the games begin in late August, I’m either glued to the TV or I’m visiting football stadiums around the country enjoying some...

Hydronic Balancing: A New Frontier for NCI Contractors

As we are in the process of developing a commercial air and water balancing training and certification program for larger systems, we have been creating hydronic balancing forms and procedures. Water systems have been an integral part of commercial air conditioning...

How to Use Air Density Correction Factors

Air density correction factors have been a part of our air balancing curriculum since the early 1990's. NCI published a small table years ago and encouraged you to make corrections for air density when measuring airflow at higher altitudes. But the accuracy you are...

How Much Cooling Can Your Fan Afford?

The quest for higher efficiency cooling equipment is hitting a barrier. Unsuspecting installing contractors are being handed hidden liability that is difficult to identify and resolve. Certain cooling coils are being built for the highest possible SEER rating, but...

How Does Air Balancing Save Energy?

How Does Air Balancing Save Energy? by Rob "Doc" Falke, President, NCI Air balancing is a relatively small specialty profession with less than 3,000 commercial supervisors certified by four major organizations. There are fewer than 7,000 residential balancing...

Halco

2011 February Member of the Month

Performance is the Future of the HVAC Industry

All Pro Plumbing, Heating and Air Conditioning, Contractor Spotlight, owner Richard Black, service manager Mike Greany.

Getting a Diagnostic Test From a Service Call

Besides the valuable information the reading provides to help resolve the service call issue, it can be a prime lead-in to selling a complete system diagnostic and potential duct renovation work. To provide your customers with air conditioning systems that perform as...

Five Minute Duct BTU Loss/Gain Procedure

We've all heard our customers describe how their air conditioning system works O.K. in the morning, but doesn't deliver enough cooling in the afternoon. We send out a service tech, he services the unit and reports it's working pretty well. End of story, except our...