HVAC contractors perform work involving systems that control indoor temperature, ventilation, humidity, and air movement. Depending on their licensing, qualifications, and scope of work, their services may include installing and replacing air conditioners, heat pumps, furnaces, air handlers, ductwork, thermostats, ventilation equipment, and other HVAC components.

HVAC contractors may also diagnose system problems, perform preventive maintenance, evaluate system performance, repair or replace components, and address refrigerant-related issues. Work involving refrigerants may be subject to U.S. Environmental Protection Agency (EPA) Section 608 requirements, while contractor licensing and other professional requirements vary by state and local jurisdiction.

In Texas, HVAC contractors performing regulated air-conditioning and refrigeration work are subject to applicable requirements administered by the Texas Department of Licensing and Regulation (TDLR).

An HVAC contractor may be an individual contractor, a small local business, or a larger HVAC company. The term describes the type of professional or business performing HVAC work, rather than a specific company or regulatory organization.

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