We are a Full-Service Commercial Heating, Ventilation, Air Conditioning, Refrigeration & Plumbing Contractor

Since 1981, commercial, industrial and institutional building managers have relied upon Thayer Corporation to design, install, maintain and repair their HVAC/R & mechanical systems. 

To successfully operate facilities today there must be a thorough understanding of the complex interactions between all of the systems  within a building; Each system plays an important role in the operation of the facility and the comfort and safety of its occupants. Thayer Corporation strives to deliver the highest quality, performance-based services at all times by providing business solutions tailored to each individual customer. We aim to develop enduring relationships with our customers by taking the time to understand their unique needs and culture.  Our ultimate business goal is to make a positive and productive difference to our customers’ business performance. We offer a complete range of services with a team of experts supporting customers throughout the States of Maine & New Hampshire.

Video Introduction About Us

Trust Creates Solutions….We Stand Behind Our Work

Career Opportunities

Thayer Corporation Proudly Serves The States of Maine and New Hampshire


Hours Of Operation

Monday - Friday
7:00 a.m. to 5:00 p.m.
Always On Call 24/7

Saturday & Sunday
24/7 Emergency On Call Support

24/7 Emergency Service

Keeping your systems operational is our primary goal. 



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Don't be shy.  Let us know if you have any questions!