Brennan Cooling & Heating

Brennan Cooling & Heating is a one-man HVAC shop in Billerica, run by owner Tim Brennan, who has — according to the company's Better Business Bureau listing — been doing heating, air conditioning, and sheet metal installation, service, and repair here for 32 years. Written feedback is scarce, but what exists points the same direction. In a 2025 Google review, a customer called him "always available," said he "arrives quickly when we call him for help," and added they'd already recommended him to neighbors — the kind of line usually written by someone who's called more than once. There isn't much else to weigh: no complaints, licence disputes, or government actions turn up anywhere in his record, and the BBB doesn't list him as an accredited business even though it grades him A+. He's a reasonable call for routine Billerica-area heating and cooling work from a long-tenured local shop — just go in knowing the written track record is thin, so it's worth asking your own reference questions before booking.