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Typical your area range for this kind of work, from regional averages — not a quote from Thayer. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Thayer, LLC describes itself on its website as an HVAC/R mechanical contractor offering commercial, industrial and institutional building solutions in Maine and New Hampshire since 1981. On its Better Business Bureau profile, the company calls itself an HVAC design-build contractor and maintenance provider with expertise in alternative energy systems and energy controls. The Better Business Bureau grades it A+. A 2023 customer said their installation was delayed six months, that they got different answers from everyone who came, and that the installers were rude and not helpful when they arrived. A 2023 reviewer described the woman who answers the phone as rude. A 2025 reviewer who said they had never used the company complained that a technician blocked their car in with a company vehicle. A 2025 reviewer said a company driver matched their speed and brake-checked them while they merged at exit 48.
Parking lot was nice
All I have to say is the employees are extremely unprofessional - This gentleman is at the dispensary blocked my car in with a company vehicle - I called to report it and Claire confirmed he is a technician and said well we do have customers there but the employee had stated he’s off shift and had a bag of marijuana walking out of the recreational side! One reporting to employee Claire she was so unprofessional. She was very condescending and talked over me a lot so it makes me think that the entire company is this way! Thank God I’ve never use this company and we have a different one that services our units but watch out the customer service is awful and the employees are allowed to go and get drugs on and off shift with company vehicles! Guarantee your installation process will be nothing but a hassle! Extremely low standards are being held at this business!!!!
Your drivers need an attitude adjustment. I was getting on at exit 48 north and with my blinker on license plate 8578 ZQ wouldn’t let me merge on. He matched my speed and then brake checked me when I got behind him.
No idea if these guys are good at their jobs or not, but I can say I've never spoken to a nastier, more rude person than the woman who answers the phone there. Despicable.
we had a 6 month delay in the installation. i got different answers from everyone who came. and when the installers arrived, they were rude and not helpful. i would not recommend them.
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1 change recorded — last scanned Oct 4, 2026.