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Knowles Mechanical Van


(207) 445-4092


Knowles Mechanical, Inc. is a locally owned and operated business based in Vassalboro, Maine that provides residential and commercial solutions for HVAC, plumbing, refrigeration, and metal fabrication. Our services are available throughout the entire state of Maine. We take pride in delivering quality workmanship, professionalism, and ensuring customer satisfaction.


As your local installers, we offer products from York, Trane, Rinnai, System 2000, American Standard, Daikin, and Viessmann. Our services include emergency assistance, routine maintenance, system conversions, system servicing, and new installations for heating, cooling, refrigeration, and plumbing systems. We have the necessary experience and expertise to handle any project, regardless of its size.


In addition to our HVAC services, we specialize in commercial fabrication and installation of metal ductwork, piping, fittings, and custom metal products. We have the equipment and skills to meet your specifications and deadlines. We have completed projects for various clients, such as KVCAP, ABM, Fairfield Inn, Children's Museum, Bixby Chocolate Factory, Maine Equal Justice, and more.


We are committed to providing you with the best service possible at Knowles Mechanical, Inc. We hold licenses, insurance, and certification from the State of Maine. We are also members of the Maine Energy Marketers Association and the Refrigeration Service Engineers Society. We value your trust and loyalty and look forward to serving you for years to come.

HVAC Vent next to a brick wall
Bathroom sink
Hampden Webbs metal duct work

Commercial Preventative Maintenance, Refrigerant Recharge, System Conversions, System Service, Emergency Service, and Commercial and Residential Installs.


Installation, Repairs, Pumps, Leaks, Water Pressure, Winterizing, Burst Pipes, Well Tanks, Mixing Valve Adjustments, Re-Piping, and More.


Commercial Fabrication, Repairs, Custom Builds, Replacement Parts, and Installs.

We are your source for HVAC
Service & Install

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"Fantastic service, unlike the local guys, they went through my furnace from top to bottom, checked my lines, tank filter, cleaned and tested everything. This was my second time having them service my furnace and I will be calling them next time as well because the service was just that good. Keep in mind: Good workers are one thing, but having an upbeat and happy personality took them over the top. I highly recommend Knowles Mechanical."


Ray Lemar

"I want to share a great experience I had today with Knowles Mechanical. The staff was super from the receptionist, to the supervisor to the technician. They were all super professional with a pleasant attitude. They showed up on time as promised, did the job in a workman like manor and even showed me pictures of what they found and how they remedied my problem. Bill the tech guy was exactly what you would want in a service person, thank you Bill. I Highly recommend Knowles Mechanical."

John Carey

"Total replacement of HVAC system in the factory building. They kept us informed of their plans. Their people were thorough, polite and competent. Changes were taken in stride with minimal impact on cost and schedule."









Michael Drickey

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