Geothermal.contractors

Control Tech Heating, Air, & Plumbing is a family-owned and operated geothermal contractor serving Zionsville, Indiana and the Indianapolis metro area since 1983. The company specializes in closed-loop geothermal system installation and service, leveraging the earth's constant 50–55°F temperature to achieve up to 500% heating and cooling efficiency. Control Tech installs modern geothermal systems from industry-leading manufacturers and pairs them with comprehensive HVAC services including air-source heat pumps, furnace installation, and ductless mini-splits. Operating across Hamilton County, Boone County, and surrounding areas, the firm distinguishes itself through an in-house team of technicians—no subcontractors or commissioned salespeople—ensuring transparent, upfront pricing and quality workmanship. With four members of the Winters family leading operations, Control Tech maintains a 4.9-star Google rating across 1,196 reviews. The company provides 24/7 emergency service and is licensed, bonded, and insured, making it a trusted choice for geothermal heating and cooling solutions throughout Central Indiana.