About
DeHart Air Conditioning & Heating is a fourth-generation, family-owned contractor founded in 1920 in Chickasha, Oklahoma, originally as DeHart Sheet Metal Works. The company moved into HVAC under Elmer DeHart and expanded into the commercial and geothermal markets in 1976, and today installs and services ground-source geothermal heat pump systems using ClimateMaster equipment. Operating from 1201 S. 4th Street in Chickasha with a second location in Duncan, DeHart handles residential and light-commercial geothermal installation, maintenance agreements covering ground-source systems, and conventional heating and cooling. Co-owners Seth and John DeHart continue the family tradition across more than a century of central Oklahoma service to Chickasha, Duncan, and surrounding communities. Verified active operator via dehartac.com company history + geothermal service pages (OK bundle audit 2026-06-01)
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Dehart Air Conditioning — Chickasha, Oklahoma
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