Trusted Home Services Across the Puget Sound Since 1987
Seattle's Trusted Home Service Experts
Proudly Serving Communities Across Western Washington
Keeping your home comfortable through Western Washington’s changing seasons is essential to enjoying where you live. Since 1987, homeowners across the Western Washington region have trusted Brennan Heating, Air Conditioning, Plumbing, and Electrical for heating, cooling, plumbing, electrical, and air quality solutions that deliver dependable performance and lasting comfort.
We’re committed to helping you create a more energy-efficient home and addressing your comfort needs with clear communication and practical solutions. Rooted in honesty, integrity, and outstanding service, Brennan Heating, Air Conditioning, Plumbing, and Electrical approaches every project with care, whether you’re in Seattle, Bellevue, Kirkland, Renton, or the surrounding areas.
Energy Consultation
Your Path to an Energy-Efficient Home
We are committed to helping Seattle homeowners enhance their homes' energy efficiency. A more efficient home not only lowers monthly utility bills but also creates a consistently comfortable environment for you and your family. This is a responsibility we take seriously.
We offer free energy consultations to help you understand how your home consumes energy and suggest practical ways to reduce usage. Our team can introduce you to a selection of innovative, energy-efficient products, such as advanced Lennox heating and cooling systems, versatile heat pumps, and innovative tankless water heaters—all designed to deliver high performance while using less energy.
In addition to these energy-saving solutions, we also provide options for portable and standby generators to keep your home powered during outages. Portable generators are a flexible solution for short-term use, while standby generators automatically keep your home running seamlessly during extended power interruptions. Both options are designed to complement your energy-efficient upgrades and offer peace of mind when you need it most.
By choosing energy-saving solutions and making thoughtful upgrades, you can enjoy lower energy costs and the satisfaction of an eco-friendlier home.
High-Quality HVAC Products & Support
Service That Speaks for Itself
See Why Western Washington Homeowners Love Brennan
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“Detail-oriented and their technicians spend time teaching you the system. I also can’t believe they also came back the next day to caulk a tiny hole they made. You get quality with Brennan.”- Marcin N.
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“The install team was great. They were all experienced and really enjoyed their jobs, and it showed. I love our new Carrier 38MURA hvac system already, and it's not even hot out yet.”- Melissa R.
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“Bryan & Michael arrived early as I requested and worked hard to clean the furnace vents, returns, and ductwork, including the dryer vent. Our daughter had recently used Brennan & recommended the company. I am delighted with the results.”- Janie H.
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“The service was extremely professional, courteous, respectful, and knowledgeable. We loved Dakota & Brian!”- Lloyd N.
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“Excellent and efficient service. Brayan Rodriguez and Giovanni did a great job. Brennan will be my go to for services needed”- Diane V.
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“The services provided by the Brennan staff were outstanding. Sergio & James were on time, completely explained the 5 W's before starting, they were efficient, cleaned up as they worked, explained how each part of the system functioned.”- Steve S.
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“I had Brennan come today to clean my air ducts. Since this was the first time having it done, it was reassuring to know it’s a pretty simple & fast process, and totally affordable. You're always in good hands with them.”- Sandy M.
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“Our experience from estimate to installation was outstanding! Their price and quality of installation were a great deal. I highly recommend them for any Water Heater, AC, or Heating needs!”- Douglas D.
Service You Can Rely On. People You Can Trust.
A member of our team will be in touch shortly to confirm your contact details or address questions you may have.
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Smarter, Safer, & More EfficientFrom high-efficiency HVAC installs to LED lighting upgrades and surge protection, we’re here to improve the way your home feels—and functions—year-round.
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Award-Winning CareMulti-year Angie’s List Super Service Award winner with an A+ BBB rating, Brennan is Seattle’s trusted partner for top-tier heating, cooling, and electrical services.
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Integrity Meets InnovationFrom certified energy consultants to licensed electricians, our team brings you forward-thinking solutions backed by time-tested values of honesty, reliability, and expert care.
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Trusted Since 1987With decades of experience and thousands of satisfied customers, Brennan delivers worry-free heating, cooling, and electrical solutions with service you can count on.
Ways To Save With Brennan
From flexible financing to energy-efficient upgrades—we make comfort more affordable.
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Flexible FinancingDon’t let budget concerns delay your comfort. We offer trusted financing options to help you move forward with confidence. -
Current SpecialsWhether it’s seasonal savings or limited-time discounts, we’ve always got a way to help you save more.
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Energy RebatesEligible HVAC upgrades could qualify for big rebates under the Inflation Reduction Act. Let’s help you save while going green.
Here When You Need Us: HVAC Service Throughout Western Washington
Heating, cooling, plumbing, and electrical issues can strike at any time and often require immediate attention. At Brennan Heating, Air Conditioning, Plumbing, and Electrical, we stand ready to address your needs quickly and efficiently, restoring comfort and functionality to your home with minimal disruption.
Serving communities from Kent to Kirkland and beyond, we offer flexible service options designed to fit your lifestyle. Our team is available 24/7 for urgent situations, with dedicated emergency services when it matters most. We strive to provide same-day service whenever possible and even offer weekend appointments to accommodate your schedule, because big problems don’t wait for convenient times to rear their heads.
