Maintenance and repair of residential or commercial HVAC systems


David Richardson/NCI
Interior Hvac Diagram
David Richardson/NCI
If you know what to look for, a visual inspection provides clues to unsafe operation. It's never good for one package unit to exhaust into the economizer of an adjacent unit.


David Richardson/NCI

Two Overlooked Supply Register Traits

May 21, 2024
Many in our industry overlook the importance of supply registers.
David Richardson/NCI

A New System Measurement Procedure – 20 Years Later

April 16, 2024
David Richardson shares the origins of NCI's System Efficiency Ratio™ testing, and other NCI advancements in HVAC system performance testing.

Servicing Furnace Pressure Switches

April 10, 2024
The furnace pressure switch opens and closes to prevent harmful combustion gases from entering the living space and to prevent furnace fires and potential explosions.
National Comfort Institute

Why HVAC and Home Performance Go Together

April 1, 2024
The integration of Home Performance into HVAC provides a smarter approach to better serving customers.

Make a Craftsmanship Commitment in 2024

Jan. 30, 2024
It’s time for a comeback of pride in workmanship. Here are some ways you can commit to reviving craftsmanship this new year.


Quiz: Indoor Air Quality Accessories

May 20, 2024
Take our latest quiz.
National Comfort Institute
Before you jump on the heat pump bashing bandwagon, look at your duct installation practices first.
Contracting Business/Kelly L Faloon
Ahr2023 Succession
Contracting Business/Kelly L Faloon
Ahr2023 Women
Contracting Business/Kelly L Faloon
Ahr2023 Nate
Contracting Business/Kelly L Faloon
Ahr2023 Hvac Industry Update

AHR 2023: HVACR State of the Industry

Feb. 8, 2023
Industry leaders discuss critical issues for the HVACR industry.
Contracting Business/Kelly L Faloon
Ahr2023 Recruitment

AHR 2023: Be the Employer of Choice

Feb. 8, 2023
HVAC technicians are looking for employers who offer them work-life balance and a career path in an industry that directly affects people's health and comfort.
Contracting Business/Kelly L Faloon
Ahr2023 Profit Pricing

AHR 2023: Pricing for Profit

Feb. 7, 2023
Don't base your pricing on what your competitors are doing; base it on your overhead costs and billable hours.
David Spates Dreamstime
Hvac Repairman Dreamstime L 70415842

Should You Repair or Replace that HVAC Unit?

Feb. 1, 2023
Which is most beneficial to customers? Read what experts in #HVAC system maintenance advise about when to repair or replace an HVAC system.