Brennan Heating & Air Conditioning

Name: Brennan Heating & Air Conditioning
Address: 4601 S 134th Pl, Seattle, WA, 98168, US
Telephone: 206-248-7900
Price range: $$$$
Rating: 3.5

4601 S 134th Pl
Seattle, WA 98168 206-248-7900

Checkbook's Top Rating
Quality	NO
Price	NO

323 ratings
76% gave a "superior" overall rating
- Prices 30% higher than average
Compare 66 nearby air-conditioning & heating contractors
"I still use Brennan after they installed my main system many years ago. They are not the cheapest but..."
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Prices for Brennan Heating & Air Conditioning

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Consumer Ratings for Brennan Heating & Air Conditioning — 323 Ratings

Percent of customers who rated service "superior" for: | = average for all air-conditioning & heating contractors

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Complaints for Brennan Heating & Air Conditioning

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Current BBB report

Areas Served by Brennan Heating & Air Conditioning:

King Co.
Kitsap Co.
Mason Co.
Pierce Co.
Skagit Co.
Snohomish Co.
Thurston Co.

Equipment company services/installs:

Air duct cleaning
Humidifiers
Ductless mini-split systems
Air ducts (sheet metal work)
Central air conditioners

Electric furnaces
Gas furnaces
Hot water heating systems
Hot water systems pipes & radiators
Electronic air cleaners

Heat pumps
Attic fans

Consumer Comments for Brennan Heating & Air Conditioning

Consumer from KENT, WA
May 25, 2026

I still use Brennan after they installed my main system many years ago. They are not the cheapest but do quality work. They did overcharge me on materials for a fix they did incorrectly when it was installed. I had to challenge them on it, but they did eventually come to a compromise and refund some of the materials and labor back. Would be nice if they could work on more prompt and courteous communication.

Consumer from LAKEWOOD, WA
Feb 24, 2026

I previously reviewed this company in May 2022 after a furnace install. This review is about maintenance and repair. I continued to use Brennan for yearly maintenance so as not to jeopardize the warranty. I will not continue to use them for this service. Last year 2 months after having maintenance done, the A/C was not functioning on the heat pump and was due to an issue that should have been noticed during the maintenance visit (which was over $500). The tech who came to fix the problem was initially going to charge me almost $200 for the diagnosis. He called a manager and had the fee waived after I balked at the price. When I cleaned the filter on our minisplit, I discovered the person who did the maintenance installed the filter so it was folded over on itself! I'm surprised he hadn't broken it. The minisplit is working more efficiently after the filter was properly installed. Costco affiliated providers are not always the best option in this case.

Consumer from Graham, WA
Jul 19, 2025

We had a great experience with Brennan Heating and Cooling. They installed a new furnace and central air conditioning in our house.

...and 59 more consumer comments for Brennan Heating & Air Conditioning

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