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Brennan Heating & Air Conditioning
Heating Contractor
Today 7:30 am – 5:00 pm
18 followers|185,817 views
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#Lennox makes the quietest units on the market. We've never seen an #HVAC unit shown quite like this. Take a look! http://social.lennox.com/5MO
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Need a reason to get your HVAC system checked? Here are four.
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Have a sunroom or room addition that needs extra cooling? A mini-split air conditioner may be exactly what you need.
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Your bathroom fan is a secret weapon for home ventilation. Make sure to turn the fan on when taking a shower to remove heat and humidity.
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The new XC20 from #Lennox is the latest in home comfort balancing temperature, humidity & energy savings. http://social.lennox.com/O9w
Get tips and inspiration for relaxing in absolute comfort year round, while saving every month in energy costs.
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See #tips on how to maintain #efficiency at home when you're away on #vacation.
brand.com is your first and best source for all of the information you’re looking for. From general topics to more of what you would expect to find here, brand.com has it all. We hope you find what you are searching for!
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Just because the temperature is warming up doesn't mean you should forget your furnace. Upgrade to a new furnace so you can enjoy the seasons ahead! #SeattleFurnace
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The iHarmony® zoning system lets you set a different temperature in each room. Now everyone can be comfortable! http://social.lennox.com/WJo
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The Energy Savings Calculator from #Lennox will show how much you can save with a high efficiency #HVAC system. http://social.lennox.com/1I5
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Take advantage of Brennan's reliable, professional, and award-winning services! #HeatingAirConditioningSeattle
Premier Seattle heating and air conditioning contractor Brennan Heating has won Angie's List Super Service Award 9 years in a row.
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Hear from #Lennox how smart #appliances make smart homes. http://social.lennox.com/aJU
Get tips and inspiration for relaxing in absolute comfort year round, while saving every month in energy costs.
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Looking for a new air conditioning system to stay cool this summer? Read more here to find out if portable air or central air is right for you! #AirConditioner #CentralAir #PortableAir
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Contact Information
Map of the business location
4601 S 134th Pl Seattle, WA 98168
4601 South 134th PlaceUSWashingtonSeattle98168
(206) 248-7900brennanheating.com
Heating Contractor, HVAC ContractorToday 7:30 am – 5:00 pm
Monday 7:30 am – 5:00 pmTuesday 7:30 am – 5:00 pmWednesday 7:30 am – 5:00 pmThursday 7:30 am – 5:00 pmFriday 7:30 am – 5:00 pmSaturday ClosedSunday Closed

Brennan Heating & Air Conditioning is a locally owned and operated HVAC contractor that has been keeping homes comfortable since 1987. We provide Seattle furnace and air conditioning installation and repair and offer gas fireplace inserts and indoor air quality products.

Our superior technicians average more than a decade of HVAC experience and are factory-certified in top brands like American Standard, Maytag, and Lennox. Brennan Heating has received awards from Puget Sound Energy, Lennox, and Angie’s List for our energy-efficient, customer-focused heating and cooling services.

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Review Summary
3.7
11 reviews
5 star
5 reviews
4 star
1 review
3 star
No reviews
2 star
No reviews
1 star
5 reviews
"...new super-high efficiency gas furnace and Rinnai tankless water heater..."
"Brennan installed our ductless heat pump recently, and we love it."
"Being on Bainbridge, we do not have natural gas service, we use propane."
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Have them in circles
18 people
Vicki Fairall's profile photo
Windy City Air Conditioning & Heating's profile photo
John Smith's profile photo
BBB serving Alaska, Oregon & Western Washington's profile photo
Arianna Evans's profile photo
HVACSS's profile photo
souad sdiri's profile photo
HVAC Local's profile photo
Bella Roy's profile photo
All reviews
Theresa Dodge
7 months ago
We had to call on Jason and Tim 3 times to come and fix our heater. We are renters and they treated us the same as if we owned this house! They came the same day as the heater went out and had us up and running. They made another trip out the next day to try and see if they could fix the problem the contractors caused when this house was built. It ran ok for a week but went out again. They came immediately and got us squared away! Thank you Jason for being so diligent and for doing such a good job! Very professional! They are the BEST!
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Elliott Green
a year ago
Our Brennan service tech, Adam, diagnosed a consistent problem with our gas furnace. Being on Bainbridge, we do not have natural gas service, we use propane. The original installer failed to convert one of our two gas furnaces from natural gas to propane. In the two years we've lived here we've had the original installer out twice to fix the furnace because it kept losing its pilot. Their visits were expensive, at $300 each, and totally ineffective. Adam diagnosed the problem, recommended that a propane conversion be installed, and quickly installed the required parts once they were available. We now have a gas furnace properly configured for propane that heats our living room.
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Mark Hartman
6 years ago
Well, it's three years after the installation of a brand new super-high efficiency gas furnace and Rinnai tankless water heater, and none of the promises of increased efficiency we were assured of have come to fruition. The tankless has caused nothing but headaches and the furnace runs continuously -- much more frequently than the "less-efficient" 25-year-old unit Brennan removed ever ran. Our utililty bills have actually increased slightly, and we're using even more therms than before even though our energy use habits (such as thermostat settings) have remained consistent. Brennan couldn't have cared less about my dissatisfaction -- basically told me to get lost, as a matter of fact. Unfortunately I paid the first 50% installment via a credit card, and they went ahead and charged the remaining 50% to my card without my consent BEFORE EVEN COMPLETING THE WORK (since I had given them my card information), so I had little recourse. I'll never make that mistake again. I recommend paying by check if you are foolhardy enough to trust these clowns to your heating and cooling needs -- at least that way you'll have some method of obtaining a measure of satisfaction I was never able to receive. As a side note, make sure that whoever sells you new equipment is knowledgable about the products they are hawking. We dealt with a salesperson who knew little about possible consequences of installing a tankless in existing construction. I think the tankless units are great in new construction, but caveat emptor in existing homes -- we've run into serious issues the sales staff never mentioned. When the issues cropped up, what was Brennan's reaction? "Buzz off -- not our problem."
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A Google User
5 years ago
dishonest, dont believe warranty. heater had problems immediately and BRENNAN would not honor the warranty! called BBB! sure the reps SELL good, but the intregrity is zilch! what bad luck they conned me!
Boyd Antonsen
a year ago
We just had a heat pump installed by Brennan. We found them through Costco. They came to our home for an evaluation of our needs and gave us a very fair price. They showed up on the day of install on time and ready to work. The crew are all employed by Brennan. They do not sub out any of their work. So, they all work well together. They completed the job very quickly and professionally. They were very neat and tidy. If they had to enter the home they always took their shoes off. They were very polite and respectful. We even have a cat that can not go outside and they were very aware of not letting her out. We were very impressed with there friendly attitude and the finished product.
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Brandon Gillin
9 months ago
Brennan installed our ductless heat pump recently, and we love it. Kevin, Jason, and Bob were all very pleasant and professional. I would not hesitate to refer family and friends to Brennan.
A Google User
5 years ago
Puget Sound Energy (PSE) recommended Brennan Heating, so although they were slightly more expensive than the two other bids we got, we went with Brennan to be safe. Unfortunately the experience was awful. The installers didn't use ground cloth so our basement floors and walls were filthy (installed in January), the existing oil furnace was to be resold, which we told the installer, but still the electrical chords and casing were cut so we couldn't re-sell. The oil gas lines were not cut back so they are still free hanging from the ceiling. The installer (kid) fell off the roof (no safety measures were used), but still wanted to finish the job (we were worried about his condition/clear head). Lastly we told the estimator we wanted a split for a gas stove in the future, but the kid said he wasn't told that so we would have to re-dig up our pipeline and have new permits when we install a gas stove in the future. All in all, in every way, we were very disappointed with the professionalism (lack of) and quality of the installation. We submitted this complaint with Brennan, who would not take responsibility for any of their actions, and to the Better Business Bureau and PSE – hopefully PSE will take them off their recommendation list at the very least.
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A Google User
7 years ago
These guys had great prices on a new gas furnace and 50 gal. hot water heater (I called 3 other places). They were on time, clean, and knowledgable. They walked me through the new thermostat I bought, vacuumed and cleaned up the area they were working on and left me feeling confident with their work.