Welcome to SummerSun Heat & Air

A Holistic Approach to Indoor Air Quality

SummerSun Heat & Air is a licensed, insured, and certified heat and air-conditioning company. Serving all of North Texas, SummerSun specializes in a holistic, cost saving approach to indoor comfort and air quality.

Owner Gary Mertz and his team offers over 30-years experience in both commercial and residential construction, maintenance and energy management and have built relationships with their clients by finding solutions that fit needs instead of maximizing profits. Instead of strictly repairing or replacing existing equipment, SummerSun will first invest time to investigate the overall air quality needs while respecting the client’s budget needs.

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Building Relationships through Trust



"You will not find a more honest and trustworthy person for your HVAC work. I plan to bring Gary back for some additional work and he will be the first and only person I call for any future work."
~ G. Dasher - Dallas, Texas

Want to know more about SummerSun Heat & Air?

Call us at 214-415-4867 or find us on: