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...

How to Determine Combustion Air Performance

Combustion air testing is performed using a draft gauge and a CO analyzer. When the draft in the flue of an appliance is low or below -.01" to -.02" W.C. and when CO reading are rising, combustion air problems are present. Carbon Monoxide diagnostics consistently...

How to Adjust Barometric Dampers on Gas-Fired Appliances

The procedure and purpose for adjusting barometric dampers for gas appliances is completely different from the reason you adjust barometric dampers on oil equipment. Let's take a look at each method to get a clearer picture of what we're trying to accomplish. OIL...

Homer Nine and Sons of Beaver, Pennsylvania

May, 2010 NCI Member of the Month

Harvesting Summer Leads – Now Is The Time To Reap

That quiet time is just around the corner. Those days when the heat subsides, but it's not cold yet. The panic shifts from "How am I going to get all this work done?" to "We gotta sell something!" This is a great time to get caught up on the air diagnostic leads that...

Hard to Pinpoint CO Problem? Narrow It Down

Have you ever noticed a distinct change in CO readings when the blower comes on? Most technicians believe this indicates a cracked heat exchanger. But could it be something else? There are at least three scenarios that could cause this situation on Natural Draft and...

Haller Enterprises, Lititz, PA

200 Sept. Contractor of the Month

Generate New Work With CO & Combustion Testing

In addition to keeping your customers safe and saving them money, CO and Combustion Testing can be a very lucrative source of revenue for your contracting company. One of the main benefits of testing is the repair work it generates. These repairs are offered by few of...

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...