Key Heating & Air Conditioning

Key Heating & Air Conditioning serves Exeter and the surrounding New Hampshire communities as a full-service HVAC contractor backed by 706 client reviews that collectively earn the business a 4.8-star rating. The company maintains around-the-clock availability every day of the week, enabling dispatch for heating and cooling emergencies regardless of when problems arise. Technicians with experience across residential systems routinely handle calls spanning from straightforward maintenance visits to complex diagnostic challenges involving older equipment. Customers in Exeter and nearby towns regularly describe reaching the company during weekends or late evenings and receiving same-day response.

Specific equipment installations highlighted in recent projects include ductless mini-split configurations that require careful positioning of refrigerant lines and electrical connections. The company maintains service agreements for ongoing maintenance and offers member perks such as waiving diagnostic fees on scheduled visits. Emergency visits booked outside normal business hours address furnace failures and system malfunctions that cannot wait until the following day, a capability several reviewers specifically required after competing contractors failed to respond.

Reviewers consistently mention individual technicians by name. Jonathan DeSisto guided a homeowner through extensive documentation requirements during a multi-unit mini-split installation, while Seth, Will, and Max composed the installation crew praised for concealing exposed line sets beneath roof overhangs for a clean visual result. Peter handled a Saturday night after-hours furnace emergency for a new customer who had not previously contracted with the company, arriving on time and explaining repair options. Michael resolved an urgent situation by assessing the issue, implementing a temporary repair, and ordering components needed for a lasting solution.