IAQ & Ventilation

Management of airflow and reduction of impurities from air circulating in homes and buildings.


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National Comfort Institute
Pacific Northwest National Laboratory
Contracting Business/Kelly Faloon


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.
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Maximize Your Commercial HVAC Business with Indoor Air Quality Services

Sept. 26, 2023
Awareness of commercial building IAQ is higher than it's ever been. Position your commercial HVAC business as a provider of indoor air quality solutions.
Ashrae Title Page 241

ASHRAE Standard 241 Ushers in New Era of Air Filtration for Buildings

July 21, 2023
Far-reaching standard establishes stronger airborne infection risk mitigation standards for buildings.


Quiz: Indoor Air Quality Accessories

May 20, 2024
Take our latest quiz.
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Manhattan darkened by smoke from Canadian wildfires.
Contracting Business/Kelly L Faloon
Ahr2023 School Iaq
Ahc 2023

New application predicts IAQ and thermal comfort ratings before you construct

Sept. 19, 2022
The simulationHub team at CCTech invested more than four years of research in developing AHC 2023, described as the world's most advanced indoor air quality prediction app.
CoilJet CJ-200E HVAC Coil Cleaner System

HVACR Products: August 2022

July 26, 2022
This month's product gallery highlights filters and cleaners, valves and fittings, and more.
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Down to Business

July 22, 2022
A business management guide from Contracting Business.
Interstate Traffic

Visualizing the 'Traffic' of Airflow

June 17, 2022
Vehicle traffic on a busy road is a perfect analogy to aid understanding of the way airflow behaves inside a duct system.