Knowles Mechanical, Inc.

& Knowles Metal Fab

Heating, Ventilation, Air Conditioning, Plumbing Installation, Sales & Service

Certified Professionals

All of our employees are licensed and certified.

Residential Services

Upgrade your home HVAC system.

Commercial Services

Increase productivity with an updated HVAC system.

Preventative Maintenance

Leave your building's scheduled maintenance to us and focus on more important tasks.

System Conversions

Propane, Oil, Natural Gas, you name it, we'll change it.


We'll fix that burst pipe and install that new Jacuzzi tub you've been dreaming about.


  • 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
  • KEITH AND his crew are nothing short of fantastic! True professionals at their craft. From their billing dept., to the customer service people, to the field crews. The whole company is great to deal with! I'm glad I chose Knowles Mechanical.

    Johnny Wulff
  • THEY CONVERTED our house from oil to natural gas. Furnace, range. Installed a line for a future gas dryer and installed a tank-less water heater. They were very professional and thorough with their work. Two days after they were done, we had a power surge (not their fault) that damaged the furnace. They were notified and they came immediately to fix the damage at no charge. They will routinely stop by when they are in the area to see how we are doing. We are both retired and it is great to know you have a contractor who cares and is dependable. We highly recommend Knowles Mechanical to anyone who needs a good HVAC contractor.

  • 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 Dickey – Sierra Peaks Tibbets


Repairs & Installs

Call us if you're looking for a new HVAC system or want your furnace repaired. Our service techs are trained to handle jobs big and small.

Metal Fabrication

Knowles Metal Fab fabricates duct for your home and commercial HVAC systems as well as decorative metal art. (Signs, Fire Place Gates & more).

System Maintenance

We will perform preventative maintenance on your HVAC systems to extend the life of your current system and save you money down the road.


Years in Business




Customers Assisted

Contact Us

Connect with us and we'll get back to you ASAP.

Contact Info

(207) 445-4092
1097 US Route 3
South China, ME 04358
United States