Indoor Air Quality

Aprilaire

Madison, United States

Aprilaire is America's leading indoor air quality solutions manufacturer, founded in 1938 and headquartered in Madison, Wisconsin. With production facilities in Madison and Poynette, the company offers whole-home humidifiers, air cleaners, dehumidifiers, smart thermostats, fresh air ventilation systems, radon control, and UVC sanitization through a nationwide dealer and contractor network. Aprilaire employs over 500 people and its Healthy Air solutions address humidity control, fresh air supply, air purification, and temperature management for residential and light commercial properties across North America.

Canadian Residential Services

Toronto, Canada

Canadian Residential Services is a Toronto-based indoor air quality and HVAC specialist serving the Greater Toronto Area with whole-home air purifier installation, humidifier and dehumidifier installation, HEPA filtration, UV light integration, and indoor air quality testing. The company specializes in Aprilaire, Lennox PureAir, Honeywell, and IQAir systems for residential customers across Toronto, Mississauga, Brampton, Vaughan, and Markham. Services include allergen reduction solutions, mould prevention, and whole-home ventilation upgrades tailored to Ontario's cold-winter, humid-summer climate.

EnviroVent

Harrogate, United Kingdom

EnviroVent is a UK-based ventilation manufacturer and indoor air quality specialist founded in 1987 and headquartered in Harrogate, North Yorkshire. Employing over 250 people with 60+ local branches across the UK, EnviroVent designs and manufactures extractor fans, heat recovery systems (MVHR), and positive input ventilation (PIV) units at its Harrogate factory. The company specializes in solving condensation, damp, and mould problems in UK homes through on-site surveys by local ventilation specialists, offering tailored product recommendations and installation for homeowners and landlords.

IQAir North America

La Mirada, United States

IQAir North America is the US operations arm of IQAir, the Swiss air quality technology company founded in 1963 and regarded as the global gold standard for medical-grade air purification. Based in La Mirada, California, IQAir North America provides high-performance air purifiers, HVAC-based air cleaning, air quality monitoring instruments, and the AirVisual global air quality platform. IQAir's patented HyperHEPA filtration technology captures particles down to 0.003 microns and is trusted by hospitals, dental practices, cleanrooms, schools, and homeowners with severe allergies, asthma, or compromised immune systems.

Mold Busters

Ottawa, Canada

Mold Busters is one of Canada's largest indoor air quality, mold inspection, and remediation companies, founded in 2005 and headquartered in Ottawa, Ontario. The company provides professional mold testing, air quality testing, asbestos testing, VOC assessment, radon testing, and mold remediation services across Ontario, Quebec, and British Columbia — with major offices in Ottawa, Montreal, Toronto, and Vancouver. Mold Busters offers same-day lab results, IICRC-certified technicians, and comprehensive indoor environmental testing for residential, commercial, and insurance claim customers.

Pure Air Services

United States

Pure Air Services is a US indoor air quality and environmental testing company specializing in whole-home air purifier installation, mold testing and remediation, allergen control, and VOC (volatile organic compound) assessment. The company provides professional air quality testing, HEPA filtration system installation, UV-C light integration, whole-home dehumidifier installation, and comprehensive IAQ audits for residential and commercial customers. Pure Air Services helps homeowners identify indoor pollution sources including mold, dust mites, pet dander, formaldehyde, and radon, and designs tailored remediation plans.

Vent-Axia

Crawley, United Kingdom

Vent-Axia is the United Kingdom's leading indoor air quality and ventilation manufacturer, founded in 1936 by Joe Akester and headquartered in Crawley, West Sussex. Now owned by Volution Group plc, Vent-Axia pioneered the world's first electrically-operated window fan and the first app-controlled bathroom fan. The company designs and manufactures unitary fans, demand control systems, heat recovery (MVHR), whole-house ventilation, electric heating, and clean-air systems for residential, commercial, public sector, and industrial applications across the UK construction market.