Seattle HVAC Services: Installation, Repair & Maintenance

A Higher Standard Company. The GREENTOP Difference

Though HVAC technology moves fast, GREENTOP keeps pace. Our technicians train continuously on emerging equipment and best practices, so homes and businesses in Seattle, WA get solutions that are efficient, reliable, and built to last. From quick fixes to turnkey system replacements, we make the process clear and comfortable.

Experience You Can Trust, Innovation You Can Feel

Customer-first HVAC service in Seattle, WA

We combine years of hands-on expertise with modern diagnostics and commissioning. That means accurate sizing, smarter controls, verified airflow, and documented results. Our team is background-checked, safety-focused, and ready to solve complex problems without upsell pressure.

Service for all major HVAC brands and models
Load calculations and performance testing on installs
Clean job sites and clear communication at every step
Licensed, bonded, and insured

Air Conditioning Services in Seattle

Keep your space comfortable through the warm season with precise cooling matched to your home’s layout and usage. We handle everything from design to final commissioning in Seattle, WA.

Central AC systems and high-efficiency upgrades
Heat pump cooling, including cold-climate models
Ductless mini-split design for single and multi-zone rooms
Package and roof-mount units where appropriate
Thermostats and smart controls, including Wi-Fi models

Heating Services

Dependable heat starts with the right equipment and safe operation. We service gas and electric furnaces, heat pumps, and dual-fuel systems with a focus on comfort, safety, and efficiency.

Furnace installation, repair, and seasonal tune-ups
Heat pump repair and replacement
Ignition, sensor, and airflow diagnostics
Combustion checks and ventilation verification

System Design & Installation

Professional HVAC system design and installation in Seattle, WA

Great outcomes begin with great design. We evaluate your home’s construction, room volumes, ducts, insulation, and electrical to select the right system and ensure it performs as promised in Seattle.

Manual J load calculations and equipment right-sizing
Matched indoor and outdoor components for peak efficiency
Custom ductwork, sealing, and balancing for even airflow
Professional startup and commissioning with documented results

Repair & Maintenance

HVAC repair and maintenance services in Seattle, WA

When comfort can’t wait, our vehicles are stocked with common parts to finish most repairs in a single visit. Preventive maintenance keeps systems efficient and reduces surprise breakdowns.

Responsive diagnostics and transparent repair options
After-hours emergency service for no-cool or no-heat situations
Maintenance plans with seasonal tune-ups and priority scheduling
Repairs on all makes and models

Air Quality, Ductwork, Insulation & Water Heaters

Comfort is more than temperature. We address the whole system around your HVAC to improve air quality and reduce energy waste across Seattle, WA.

Indoor air quality assessments and whole-home air cleaners
Air duct cleaning, sealing, and insulation to cut losses
Attic and crawl-space insulation upgrades for year-round comfort
Traditional and tankless water heater installation, repair, and maintenance

Ready to get started in Seattle, WA? Tell us what’s happening, and we’ll provide clear options, pricing, and a plan that fits your home and budget.

2582 clients have trusted us in Seattle, WA and nearby areas

We hired Green Top to install a 3-zone mini-split system in our home. Their quote was competitively priced, and the installation team did an excellent job -- they managed to get everything done in a single day, and their work was clean and high quality. Hennadii and Oleksii performed the installation, and they did an excellent job -- it's easy to tell they take pride in their work.

Responsive customer service, quality work and outstanding diagnostic price. I was looking for someone to help look at the my mini-split system. Sent in a project and get very quick response from GreenTop. Appointment set up was super quick. The technician came the day later to diagnose our system, and was able to tell us that the problem was not because of the system but different units were configured with different mode, so the system was not working. In the end, we only needed to pay the $1 diagnostic fee

Aleksi did a great job with our minisplit installation. We highly recommend.

I had a fantastic experience with Greentop when they installed a heat pump system for me. What really set them apart from the other quotes I got was their creativity and problem-solving skills in figuring out the best way to run refrigerant lines without making them an eye sore. They don’t just opt for the approach that's the least amount of work for them; they really work with you to design a solution that fits your space and your needs. On top of that, their pricing is excellent--by far the least of the quotes I got. When installation day came (just one week after accepting their quote) they rolled up with an 8 man crew and completed the entire job in a single day. The inspection passed without any issues. I’ve already recommended Greentop to friends and coworkers, and every single one of them has had the same great experience. It's been nearly 3 years since their original install, and I've had zero complaints about the system. I had them come out to add a fourth head unit and decided that this company really deserves a review for their excellent work. If you're looking for quality work, thoughtful planning, and a team that knows their stuff, I can’t recommend them highly enough.

End to end excellent service on our heat pump installation. They provided us a very consultative quote with several options to meet our needs. The estimate was far less than other companies for the same equipment. Once we selected GreenTop, they were able to start installation within 2 business days. They did a great job on installation and the owner even called to check in and ensure I was happy. The inspectors said all was installed well. We’re very happy with the experience and would recommend GreenTop to others.

We just had a great experience with Oleskii. He came out in a reasonable time, worked super fast and explained the problem with our furnace. There was no diagnostic charge and he was so kind. God bless him and this company for coming out so quick during the winter time on a weekend morning. God is good.

Green Top Heating provided the best estimate to replace my 40 year old broken home furnace. Unlike other HVAC contractors, they didn't charge for a diagnostic service visit. The installation of the new furnace into the former tight location in the middle of the house and the connection to existing ducts, took only four hours. The service tech laid down floor covering leaving the carpet clean. They also applied for a Seattle mechanical permit, registered the system and scheduled an inspection. The project cost included a senior discount.

Green top was quick to my initial request. Tech Yaroslav was early and didnt waste anytime diagnosing the issue which thankfully was minor this time. No cost! furnace was up and running within 20 minutes of his arrival. I will be calling on them again in the future should my needs change and telling all my friends. I appreciate the honest integrity and the fact that did not slam me with some hidden cost. We need more businesses like them.

Five starts for Greentop Heating and cooling! Our Rheem brand gas furnace stopped working several days before Thanksgiving. We had a competitor company come to our place for a diagnostic and they told us that the problem was the motherboard and some type of switch. When the motherboard and switch were both in the technician observed that a THIRD part was needed--a serial communication memory module, which was on severe back order from Rheem. Long story short, we spent the entire winter without a furnace! (kept warm with a hodgepodge of fireplace insert, infrared ceiling panels and portable heaters). By early February, we still did not have a working furnace! We asked WA Energy to refund the diagnostic fee (they did) and reached out to Greentop Heating and Cooling because of their stellar reviews on Yelp. Guess what? Greentop revealed that our motherboard is not even broken! The simple problem was the interface between the furnace and the thermostat. They fixed it in 24 hours and we have been enjoying (finally!) a warm home for a fraction of the price that WA Energy had quoted us. Greentop was extremely responsive, had clear communication, charged a fair price, and was quickly and accurately able to get our heat back on. If he ever need ANYTHING in the realm of heating and/or cooling in the future, Greentop will be at the TOP of our rolodex!!!!