NCI Article Library

High-Performance HVAC Resources

Measuring Static Pressure on Service Calls is a Sure Thing

We've been advocating service technicians assure total external static pressure on every service call. How are you doing with it? First, a question. How's your annual summertime bet going? You know, your annual bet on the weather. If it's working out you're really...

Measuring Air Flow on Spiral Duct Systems

When measuring airflow in spiral ducts, it's often impossible to get a hood over the registers to read the airflow. Some systems prevent even one good hood reading to use to make a correction factor. In this situation, traverse the trunk duct serving the registers at...

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...

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...

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...

Magnehelic Magic

There's nothing like a quality tool that speaks to the soul...a good ole Magnehelic Gauge. You know, that shiny, fascinating pressure gauge spun from billet aluminum, solidly attached to the precision ground helix that drives the needle upward responding to even the...

Lonnie & Eric Robnett, Nevada Heating, A/C & Plumbing – Reno, NV

Eric and Lonnie Robnett of Nevada Heating are quite a father-son team. Lonnie, the dad, is a true marketing guru and Eric the son, is a full-time air and combustion diagnostic testing and selling master. They have found success in their business together by separating...