National Safety Institute (NSI) manufactures the NSI 6000 low-level carbon monoxide (CO) monitor. This monitor is different from a UL-listed CO alarm in that it begins to read CO at five parts per minute (ppm) after 30 seconds and sounds an alarm after 30 seconds.

On the other hand, UL-listed CO alarms usually don’t sound until CO levels reach 70+ ppm and stay there for up to 3.5 hours!

NCI teaches contractors about the advantages of a low-level CO monitor like the NSI 6000 versus store-bought CO detectors.

Another difference is that CO alarms can be bought at most retail outlets, while the NSI 6000 is only available through National Comfort Institute (NCI) and is sold through professionally trained contractor resellers.

NCI teaches and certifies professionals know where to place the low-level monitor, in which room, and in the correct location. These pros also spend the time to educate their customers on how it works and what to do at the different alert levels.

This reseller program is only available to those contractors and technicians who hold current NCI CO/Combustion certifications or attend NCI’s CO and Combustion certification courses.

Did you know that if you have NCI CO-trained techs, you qualify to become a reseller and NCI will waive the application fee?

NCI CEO Dominick Guarino teaches the importance and value of this reseller program in a High-Performance HVAC Today editorial, which you can read here.

There are quantity discounts available. NCI Members save even more! So, if you have questions about the NCI Reseller program, call our Customer Care line at 800/633-7058.


See this 5-part video as Dustin Cole teaches you about the right way to do HVAC renovations.

HVAC renovation is essential in the retrofit market to achieve customer comfort and system performance. Simply swapping equipment without understanding the entire system can be a recipe for disaster. This is what NCI teaches.

Last year in Asheville at National Comfort Institute’s (NCI) High-Performance HVAC Summit, Dustin Cole presented a session that showed why and how High-Performance HVAC™ professionals blend system testing and diagnostics with ACCA Manuals J, S, D, and T to deliver High-Performing HVAC systems for clients and protect themselves from costly mistakes.

NCI recorded Cole’s presentation and divided it into five parts. If you’d like to see this presentation and get a taste for what Summit brings to the table, just go to: ncilink.com/DColePresents.

We hope to see you at Summit 2025 in Austin, TX, on September 9-12. Registration is open, and early bird pricing is available!

If you have any questions, contact your Customer Care representative at 800/633-7058.


It’s a fact: National Comfort Institute (NCI) training is NOT just for members of the organization: It is open to the entire HVAC industry.

NCI teaches the industry. It's true. Training is not based on membership.

It always has been. NCI teaches higher-level skills to help contracting firms and their technicians to not only better understand the equipment side of the equation, but also the impact of duct systems and building structures on customer comfort, safety, and energy efficiency.

If you want accuracy in diagnosing problems and solving them, NCI classes will help you get there, whether you are a member or not.

So why join this organization? Membership certainly has its benefits including discounts on training, access to member services, and first dibs on content specifically designed for members.

So why not enroll some technicians into a class or two and see how NCI training can benefit you and your customers. Then, if you feel the value is there, consider joining.

Questions? Call NCI’s Customer Care help line at 800/633-7058.