NCI Article Library

High-Performance HVAC Resources

Air Diagnostics Tip – Understanding Register AK Factors

Nearly all grille manufacturers publish a ‘free area' for each grille or register. The question is, are these free area factors meant to be used as a correction or Ak factor? Are these numbers meant to correct for the change in air velocity as it passes through a...

Air Conditioning by Jay, Scottsdale, AZ

COMFORT TEAM Arizona Air Conditioning & Heating Specialist In 1996 Bryce Johnson hosted NCI's first private training event. We conducted the training in his living room at his home in Scottsdale, Arizona. At the time he had about 8 trucks, and did maybe 1.5...

Air Advice Monitoring Tips

Air Advice is an air monitoring system

AFUE: Does it Represent True Performance?

When selling heating equipment, odds are most of us are discussing rated efficiency and how much fuel our customers may save with higher rated equipment. Much of this savings will be based on the listed AFUE (Annual Fuel Utilization Efficiency) rating of the...

Advent Air Conditioning, Lewisville, TX

National Comfort Team Member of the Month

Adjust Gas Pressure for Real Equipment Efficiency

When performing a precision diagnostic tune-up on a gas appliance it's often necessary to increase the gas pressure above manufacturer's listed recommendation in order to maximize burner performance to achieve the manufacturer's specified BTU delivery. Why Increase...

Add Out-Of-The-Box Checkups This Summer

As the temperature rises outside, some companies feel the necessity to place airflow and combustion diagnostics on the back burner. The result is missed opportunities outside of the box. Most system defects aren't revealed by the typical clean-and-check service call....

Add Duct Renovations to Your Change-Outs

The primary goal of air diagnostics is to improve system performance. Testing reveals the system deficiencies and gives us an opportunity to make necessary repairs. Duct Renovations are often necessary to allow systems to perform correctly. For years the HVAC...

Add a CO Testing Report to Your Service Procedures

Adapting System Renovations to Changing Economic Times

As economic conditions change, in order to remain successful it's necessary to evolve our recommendations to our customers. When money's tight, people continue to spend it, but they will be wiser in their decisions to be sure they get the best value possible. Over...