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Get your heating and cooling solutions directly from a team of skilled professionals. Give us a call at (510) 610-3123, or fill out the form below to get started.

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    Professional HVAC Solutions

    Speak Directly With Our Experts

    Our experts come second to none when it comes to providing professional heating and cooling services near the Sunnyvale, CA, area. If you want to get professional and reliable solutions, call us today.

    Call Us

    (510) 610-3123

    Operating Hours

    Mon – Sat: 7am – 5pm
    Sun: Closed

    Our Clients’ Testimonials

    • 5 star rating

      We had Dave remove a very old forced air furnace that was in a closet in our hall and had... read more

      Kevin D.

      David was kind, courteous and kept me informed. On time each day and did an excellent job. Since I needed... read more

      Carol Lynch
      5 star rating

      My relatively new electric furnace stopped working on Thanksgiving day, which also happened to be the coldest day of the... read more

      Lauren S.
    • 5 star rating

      My 1944 Victory Village house had the old original gas heater in the crawl space - dead. No A/C at... read more

      Jeanvieve W.

      We hired David to fix a flaky furnace on the home we just moved into. He arrived on time and... read more

      Dave Millman

      Excellent, professional services. Got my HVAC up and running beautifully. Punctual, reliable and a great partner to work... read more

      Patty Johnston
    • We called Grumpy's to replace the 70-year-old gas furnace in our new-to-us house. David came by, discussed our options, gave... read more

      Joe Bayes

      Grumpy's is great, truly wonderful! They're responsive, very knowledgeable, fairly priced, and professional. I'm so grateful for how seamless... read more

      Kelly Knight

      Excellent professional service, the charm is free. Real commitment to doing things right is what makes Grumpy's stand out.

      Jeannette Tetz
    • 5 star rating

      We hired David to fix a flaky furnace on the home we just moved into. He arrived on time and... read more

      Dave M.
      5 star rating

      What a find! I couldn't be happier with David and the work he did for us after another company (Hussey... read more

      Cynthia H.

      I am a plumbing contractor who has been using David and Grumpy's HVAC for the last 6 years and I... read more

      Will Feliciano
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