Best heat pump installation companies in Round Rock, TX

#1 Casa Mechanical Services

Round Rock · Licensed since 1989

Family-owned Round Rock heating, cooling and plumbing company, run by the Christianson family since April 2001, serving homes and light-commercial customers.

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#2 Chilly Air Services

Round Rock · Licensed since 2003

Round Rock company that has repaired and installed heating and cooling systems for homes and businesses in Williamson County since 2016.

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#3 Koala Cooling & Plumbing

Round Rock · Licensed since 2006

Family-owned Round Rock air conditioning, heating and plumbing company founded in 2019 by Scott and Stacie Feller.

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#4 Neal HVAC

Georgetown · Licensed since 2009

Owner-run Georgetown company that repairs, installs and maintains residential air conditioning, heating and heat pump systems.

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#5 Capitol Air Conditioning Services

Georgetown · Licensed since 2010

Family-owned Georgetown HVAC contractor founded in 2003 that repairs, installs and maintains heating and cooling systems for homes and light-commercial buildings.

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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 Round Rock

Round Rock averages daytime highs of about 95 to 96°F in July and August, so air conditioning carries most of the load, while January lows near 35°F still call for working heat. Texas HVAC contractors are licensed by the Texas Department of Licensing and Regulation (TDLR) as Class A or Class B air conditioning and refrigeration contractors, with license numbers that begin TACLA or TACLB. Ranked by license record and years licensed, never by payment. Checked 27 October 2026.