NCI Article Library

High-Performance HVAC Resources

Measure Static Pressure at the High Limit Switch

Hissssssssss. That's the sound nobody wants to hear when you're drilling static pressure holes near an evaporator coil. One way to avoid this awful noise on systems with gas furnaces is to measure static pressure by removing the high limit switch. In most gas...

Measure Fresh Air BTU Gain

Have you ever found an economizer with the louvers screwed closed or the linkage disconnected? There's a reason for that. There are days in the heat of the summer when the heat load of the fresh air makes it impossible for the system to keep up. The logical and...

Measure and Understand Air Flow

Accurately measuring fan airflow is a critical, yet illusive test that is key to diagnosing the performance of any HVAC system. Our industry poses many methods of finding this essential number, some are great, some are good, and some test methods are purely...

Measure and Persuade With Duct BTU Loss

The key benefit of measuring airflow is to show a customer the negative effect that a duct system can have on a piece of heating or cooling equipment. The success of a sales opportunity depends on how well we can help the customer understand how the duct system is...

Mark E. Meacham Company, Charlton, MA

Mark and Sue Meacham, the dynamic duo behind The Mark E. Meacham Company in Charlton, Massachusetts, are spotlighted as November's NCI contractor of the month. We chose to honor the husband and wife team for one specific reason - their commitment to stand for...

Mark Damper Handles For Easy Rebalancing

Ever balance a job only to come back and find out the homeowner or tenant decided to "rebalance" the system for one reason or another? By marking your damper positions when the job is complete you can easily tell if they were moved and easily rebalance the system by...

Mark Amsdill of Koch and White – Ann Arbor, MI

Mark Amsdill of Koch and White located in Ann Arbor, Michigan is April's NCI Contractor of the month. We interviewed Mark Amsdill, the firm's Sales Manager, to reveal an amazing program they use to find, employ and train beginning technicians. The other principles in...

Managing Your Most Valuable Asset

Manage Your Most Valuable Asset by David Holt, NCI Director Sales & Service Leadership Time is your most valuable resource. Assuming you make it through the next 24 hours, you have exactly the same amount of time as the richest person in the world. The difference...

Make-Up Air Equals IAQ, Safety, Comfort & Efficiency

Most homes are already leaky and drafty so why would you want to bring in more outside air into the duct system? Because that's the best place to bring it in! Normally the air that comes into buildings, leaks through the walls, windows, doors, electrical outlets,...

Make the Decision to Make Money

NCI training seminars show you how to achieve gross margins of up to 80% on testing and system renovation work. This should result in net profits of 20% or better. Some of you make these margins regularly on this type of work, yet many still do not. As we provide...