Donnelly's Cooling, Heating & Plumbing

Home Comfort Specialists Since 1972

Serving Montgomery, Bucks, Chester, & Delaware Counties

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Trusted HVAC & Plumbing Services in the Greater Philadelphia Area

Five Decades of Local Service Excellence

Trust the home comfort specialists from Donnelly's Cooling, Heating & Plumbing when you have a broken AC, inefficient furnace, or leaky faucet. With over 50 years of experience, our family-owned and -operated company has the skills and tools to handle any home service you need. You can expect licensed and insured technicians to deliver prompt, reliable solutions that keep your home comfortable and functional year-round.
What To Expect

Discover the Donnelly’s Difference

Professional Services

We show up on time, keep things clean, and listen to what you need. We treat you and your home with the respect it deserves.

Service for All Brands

We can work on all makes and models of HVAC and plumbing equipment.

Trustworthy

​You can count on us to be honest and always do what we say. We communicate clearly, provide our guarantees & warranties in writing, and ensure you understand everything we're doing in your home.​

Experienced Technicians​​

We excel at solving problems with years of experience behind us. We look at today's challenges and future needs to create the best customized solutions.​

Licensed & Insured

​Our technicians are licensed, insured, and background-checked for your peace of mind.​

Professional Services

We show up on time, keep things clean, and listen to what you need. We treat you and your home with the respect it deserves.

Service for All Brands

We can work on all makes and models of HVAC and plumbing equipment.

Trustworthy

​You can count on us to be honest and always do what we say. We communicate clearly, provide our guarantees & warranties in writing, and ensure you understand everything we're doing in your home.​

Experienced Technicians​​

We excel at solving problems with years of experience behind us. We look at today's challenges and future needs to create the best customized solutions.​

Licensed & Insured

​Our technicians are licensed, insured, and background-checked for your peace of mind.​

    We are proud to Offer Affordable Financing Options!

    Our Reviews

    See What Your Neighbors Are Saying

    Very professional. Experienced technicians.
    Sally Jones
    1 day ago
    Nick was kind and knowledgeable and we went through the house with him making suggestions about upkeep. Very professional, very nice.
    Deborah Degeorge
    1 day ago
    Donnelly’s responded to us right away even though it was past normal business hours. Caleb handled the situation very professionally
    Suzanne Philbin
    1 day ago
    Tom was deployed quickly to manage a burst pipe. He quickly assessed the issue, showed evidence and made an appropriate recommendation. He also improved the positioning of the replacement to avoid future issues. Very pleased with the service.
    Kyle Given
    1 day ago
    Brandon did an amazing job and was so quick, responsive, and professional. He informed us that we had biological growth in our upstairs HVAC system (it sure looked like mold to me) and he discovered that my moms in law suite did not have a filter on the split system that was installed during our garage to in law suite conversion. He gave us options and I discussed pricing with my husband. Brandon came back to our home the same day and he installed 2 UV light systems on both our upstairs and downstairs unit and he put a filter on my mothers split system. We were so impressed by his knowledge, honesty, and quality of work. Great experience!
    Adrienna Wilbourne
    2 days ago
      Read Our Reviews

      Donnelly’s Proven Process

      What to Expect, Start To Finish, When You Set up An Appointment With Donnelly’s
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        We Sell, Service and Install All Top Brands

        Proudly Serving

        The Greater Philadelphia area and the surrounding counties


        • Montgomery County
        • Bucks County
        • Chester County
        • Delaware County

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        Recognized for Excellence by Customers and Industry Professionals Alike