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Green City has been providing the absolute best in boiler and hydronic heating service, repair, and installation for the Seattle area. Whatever your boiler or hydronic heating system needs, the experts at Green City Heating and Air Conditioning are prepared and ready to meet them.

Hydronic heating is a method of heating that uses hot water instead of air. A hydronic heating system takes advantage of water’s superior conductive properties to heat your home more efficiently by heating objects, not air.

Unlike a forced-air system which simply blows hot air into a room (hot air which obviously rises), a hydronic heating system provides maximum comfort by heating the room evenly. Enquire with Green City today about whether a hydronic system is the best option for you and your home!


Use our form to calculate service, repair, and installation costs.


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After assessing your current heating and cooling system and pinpointing where the problems lie and how we can help, Green City not only will solve those problems with expert diagnoses and professional installation of one of our state of the art heat pumps, we will stand behind our work with a five-year guarantee of our parts and labor.


We have earned our reputation as Seattle’s best heating and air conditioning contractor. Here are some of the reasons our customers trust Green City for all their heating and cooling needs:

  • We will carefully assess your heating and cooling requirements.
  • We will patiently educate you about your new or existing system.
  • We will help you choose an option that fits your overall budget.
  • We will ensure optimal comfort and energy efficiency.
  • We will provide an extended five-year warranty on materials and labor.


  • What about the price?

    At Green City Heating and Air Conditioning our prices are competitive enough to keep us Seattle’s #1 choice. Get a quote today!

  • How can I be assured of top quality for my money?

    Green City has an A rating on Angie’s List with over 400 reviews, as well as being accredited by the Better Business Bureau. You can trust our team of experts!

  • Why not choose a cheaper option?

    When it comes to your furnace and heating system, inferior products, shoddy installation, and bad customer service are not an option. At Green City you get what you pay for and more!

  • How can I know that Green City is the safest and smartest choice?

    We are licensed (#GREENCH866B2), bonded, and insured for $1M in general liability, and our technicians are certified with the Contractor Alliance Network through Puget Sound Energy. So you can rest assured!

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Locations: 1819 Central Ave. S Ste. A27, Kent, WA 98032 | 500 Mercer St. C202-154B Seattle, WA 98109