NCI Article Library

High-Performance HVAC Resources

How to Red Tag a Defective System

How to Red Tag a Defective System When following National Comfort Institute Carbon Monoxide and Combustion Efficiency Protocols and procedures there is a chance a dangerous or potentially dangerous condition will be uncovered. If this happens, there are times when...

How to Maintain Your Combustion Analyzer

The primary goal of combustion testing is to take readings you can trust so you can evaluate the operating condition of the combustion appliance. In order to take readings you can trust you have to be sure your combustion analyzer remains in tip-top shape. The...

Equipment Red Tagging Procedure

Equipment Red Tagging Procedure Revisited When following National Comfort Institute's Carbon Monoxide (CO) and Combustion protocols and procedures, there is a good chance you'll uncover a dangerous or potentially hazardous condition. Checking ambient CO is always the...

Electronic Combustible Gas Leak Detectors

Combustible Gas Leak Detectors should be one of the most valuable tools in our arsenal of equipment. They are time savers and income generators. However there seems to be somewhat of a mistrust in their operation and ability "I only use bubbles!" I've heard than...

Draft Testing Done Right!

Many of us have been taught that if draft in the flue is .02" W.C. or higher, everything is working fine. This is a very dangerous assumption because you don't have enough information to make an educated diagnosis. Remember, none of the above methods can differentiate...

Don’t Put That Analyzer Away!

While some of us are already dealing with summer air conditioning work, in many parts of the country some of us are still dealing with heating. There's also a large number of contractors that aren't doing heating or cooling work because it is between seasons. This...

Don’t Let “Mother Nature” Control Your Summer Success and Profits!

We all love hot, humid and miserable weather in the summer because it's good for business. Unfortunately in many parts of the country that's not been the case the past few years, and for many, business just hasn't been what it should be. But should air conditioning be...

Combustion Diagnostics Yield High-Margin System Repairs

Those who have implemented Combustion Diagnostics in their service agreements know that technology has given us the ability to uncover mechanical deficiencies with fuel burning appliances like never before. Combustion analysis helps us detect improper fuel input,...

CO Monitor Sales Tips

We received two great tips on creative ways of selling Low-level Carbon Monoxide Monitors and using them to help close sales. The first tip is from NCT Member, John Jones of ABC HVAC CO., Clarkston, MI. When one of John's service techs offers the NSI 3000 low-level CO...

“Air Free” CO or “As Measured” Carbon Monoxide?

Jim Davis, Senior Instructor, National Comfort Institute "Air Free" CO or "As Measured" Carbon Monoxide? by Jim Davis The subject of carbon monoxide (CO) Air Free and As Measured is not new, but still causes confusion due to many conflicting protocols. ANSI standard...