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Brennan Heating & Air Conditioning
Brennan Heating & AC, Inc. is dedicated to providing the best heating and cooling solutions to meet your needs. We've earned a reputation for doing the job right the first time - you can count on us! As a Carrier dealer, with a wide variety of products to choose from, we can keep your family healthy and feeling comfortable all year long.

We carry a complete line of indoor comfort equipment with innovations that raise the standards of comfort and reliability, including air conditioners, heat pumps, gas furnaces, programmable thermostats, humidifiers, ductless split systems, geothermal systems, boilers, air cleaners, ultra violet lights, ventilators and zoning products.

Let the experts at Brennan Heating & AC, Inc. help you customize a solution that's right for you. We are service professionals! As licensed contractors and specialists in the field of heating and air-conditioning, we have the tools, the equipment, and the experience to keep your equipment running smoothly all year long.
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Brennan Heating & AC, Inc. was founded in 1947 by Richard (Dick) W. Brennan. Since the beginning, Brennan Heating and Air has remained a family owned and operated business. What started out as a one man shop behind the Brennan house is now a 10,000 square foot shop, showroom and office complex with two separate warehouses.
The technicians and staff at Brennan Heating & AC, Inc. are a dedicated group of individuals, working together as a team to ensure quality work and customer satisfaction. Mike Sieving has worked at Brennan's for 15 yrs. He is a co-owner of Brennan's. He is a Sheet Metal Worker, he is also a Fabricator, Welder, Installer, Estimator, and also a Plant Supervisor.
At Brennan Heating & AC, Inc. we strive for 100% satisfaction in everything we do. We value your opinion and invite you to tell us and others about your experience with us. Please take a few moments to tell us what you think by leaving us a review here on our website or on any of these popular review sites or social networks.
Your home should be your safe place, but is your inside air dangerous to your heath? We offer a variety of indoor air quality products, each of which target and combat numerous indoor air pollutants. Our indoor air quality products will help you maintain a clean and healthy indoor air environment, creating a safe haven for your family.
Thermostats are the brain of your heating and cooling system, while zoning is the muscle. Every system requires a thermostat, and zoning is great option to add on. Brennan Heating & AC, Inc. carries a complete line of thermostats and zoning products for optimum comfort and energy savings for your home.
Reviews (6)
Gary Goodwin
Gary Goodwin
Dec 26, 2021
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Best Heating and A/C in Town!
Had Furnace Problems 2 Days before Christmas!
From the Time I Called, they had everything up and Running less than 4 Hours!
Great Company!
Thank You!
Stephanie Sieving
Stephanie Sieving
Oct 05, 2019
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Great service! Everyone is so nice and willing to help. The guys are great at explaining everything so that it is easy to understand.
Stacy Stevens
Stacy Stevens
Oct 04, 2019
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Called them out because I was without heat.
My boiler is brand new. I asked several times what was going on and never got an answer. One worker told us one of the parts isnt the reason the boiler isnt working, but he replaced it because a new one would be better. (He told us this after he had already replaced it, without giving us the price.. even though I asked for a price several times). They also created a buzzing noise and explained "it's not bad, just annoying " and left it this way. A month later I got a bill for $1.5k, not far off from the cost of replacing it all together. Now I have to
Don McGee
Don McGee
Aug 08, 2019
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This company and service reps are very customer, service oriented. Would not hesitate to recommend them to friends & family.
Pam Helm
Pam Helm
Aug 07, 2018
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Fantastic after hours service. Chris made a special trip to Springfield for parts to ensure we had heat ASAP. Very client focused team, quick responses, arrived on time with prompt follow up. I will use Brennan's again and highly recommend them!
Michael Quinones
Michael Quinones
Oct 18, 2017
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Owner is a great guy to deal with the employees are always nice and they do a great job