St. John's Heating & Air

St. John's Heating & Air has served the greater Collegedale region from its Ooltewah headquarters for more than 30 years, establishing itself as a fixture in Hamilton County's HVAC landscape. Owner Larry St. John operates this full-service heating and air company personally, offering sales, service, maintenance, and installation across all makes and models. The company maintains a second location in Athens to serve eastern Tennessee homeowners, and currently holds a 4.9-star rating from 92 customer reviews. This volume of feedback with nearly-perfect scoring ranks among the most review-rich contractor profiles in the area.

What distinguishes St. John's Heating & Air from regional competitors is the company's unconditional guarantee on workmanship and their stated commitment to operate with integrity, a standard visibly confirmed in recent customer feedback where technicians advised against replacing equipment that still held useful life. The business offers same-day service for urgent calls and maintains after-hours availability, a practical benefit for homeowners facing sudden system failures. Their service menu spans residential air conditioning, heating systems, indoor air quality solutions, and new equipment installations, covering both traditional split systems and modern variable-speed alternatives.

Customer stories from the past year illustrate the on-the-ground experience. When Rebecca Blaesing's upstairs unit failed, technician Ryan arrived the same day, evaluated both systems, and presented multiple repair options rather than pushing an immediate replacement, ultimately recommending a conservative approach that saved the homeowner money. For Ryan Casserly, a gas line installation required Jason, Ben, and Alex, whose crew protected flooring during the work and cleaned thoroughly upon completion. Christine Stammen specifically noted that St. John's technicians identified a compressor another contractor claimed needed replacing at $7,250, confirming it was actually functioning properly, an honesty that earned the company a long-term customer.