#1 Holt's Mechanical
Northeast San Antonio · Licensed since 1986
Commercial HVAC contractor serving San Antonio businesses since 1972, with service, maintenance, replacement and design-build installation work.
24/7
Best 24-hour emergency HVAC companies in San Antonio, TX
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#2 Beyer Air Conditioning & Heating (Beyer Boys)
Selma · Licensed since 1995
Family-owned South Texas company, based in Selma since 1990, that installs and repairs air conditioning and heating and also does electrical, plumbing and water well work.
24/7
#3 Air Care & Canyon Lake Air Conditioning
North Central San Antonio · Licensed since 1997
San Antonio heating and air conditioning company, founded in 1974, that repairs, installs and maintains AC, furnaces, heat pumps and ductless systems for homes in San Antonio and Canyon Lake.
24/7
#4 Cowboy's Air Conditioning & Heating
North Central San Antonio · Licensed since 2007
Family-owned San Antonio company, running from one shop on Blanco Road since 2007, that repairs, replaces and maintains air conditioners, furnaces and heat pumps.
24/7
#5 Air Dynamics Mechanical
Northeast San Antonio · Licensed since 2013
Family-owned San Antonio contractor that repairs and installs residential and commercial air conditioning and heating systems, with emergency service around the clock.
24/7
#6 Comfort Techs A/C & Heating
Northeast San Antonio · Licensed since 2016
Family-owned San Antonio heating and air conditioning company that repairs, installs and maintains AC, furnaces, heat pumps and mini-splits for homes and commercial spaces.
24/7
#7 Manuel & Sons Service Co.
Northeast San Antonio · Licensed since 2017
Family-owned San Antonio HVAC company, founded by Manuel Tamez in 1988, that repairs and installs air conditioning and heating for homes and businesses.
24/7
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Rankings follow our published criteria (see How we rank). License details come from the Texas Department of Licensing and Regulation (TDLR); services, hours and prices from each company's own website. Confirm prices and availability with the company.
About HVAC in San Antonio
San Antonio's 1991-2020 normals at the international airport show average highs of about 95°F in July and 96°F in August with summer nights near 75°F, while January lows average 41°F, so air conditioning runs most of the year and furnaces or heat pumps are still needed on winter cold fronts. In Texas anyone who installs, repairs or maintains air conditioning, refrigeration or heating systems must hold an Air Conditioning and Refrigeration Contractor license from the Texas Department of Licensing and Regulation (TDLR), issued as Class A or Class B with an environmental and/or commercial refrigeration endorsement. Ranked by license record and years licensed, never by payment. Checked 28 October 2026.