CircumVent HVAC

CircumVent HVAC is a heating and cooling outfit whose website lists a service area running from Rochester, Dover and Somersworth to Portsmouth, Exeter, Hampton, Eliot and Kittery. On r/newhampshire, one commenter wrote: "I use CircumVent in Dover Nh. very reliable, quick response, fair prices." Mike West replaced an old kerosene boiler with a new propane system and installed ac/heat splits throughout one customer's home, and that customer said he worked the weekend without question. During a long home remodel, a customer said the company put in all new ductwork, a built-in whole-house dehumidifier, an upgraded heating system, air conditioning and 3 new mini splits upstairs. A customer with a mini split not blowing cold said Mike troubleshot it, recharged the refrigerant and put in dye to find a leak in the future. A customer with an AC issue on July 3rd said Mike answered the call, arrived early, and diagnosed and fixed the problem. A 2026 customer whose furnace had been out for 5 days said CircumVent came the next day and had them up and running within 3-4 hours. A 2025 customer said Mike came within 40 minutes of a call about no heat, fixed the issue and stuck to his quote, with no surprise fees. A 2025 customer needing a furnace replacement said they signed Mike's estimate and were getting installed within 2 days. A 2025 customer in Portsmouth said Mike and his team replaced a condo mini split with a new Mitsubishi unit and did the installation in a day.