Small company. Big standards. No excuses.
Shamrock Mechanical is one owner, one van, and one rule: install it like it's going in your own basement.
Windham, New Hampshire. Since 2020.
Shamrock Mechanical is owned and operated by Jon Paul Gariepy out of Windham, NH. It's a deliberately small company: the person who quotes your job is the person who does it, and the person who does it is the one who answers the phone afterward.
[Founder background to confirm: years in the trade, where he trained and worked, and what pushed him to start his own shop in 2020.]
The standard hasn't changed since day one. Real load calculations, not rules of thumb. Clean pipe and straight duct. Every system tested under load, every startup reading written down and left with the homeowner. If a job can't be done that way for the price, we'd rather not do it.
Get in TouchAbout the skull.
You've probably seen it on the van. It isn't a gimmick. HVAC is unforgiving work — gas, high voltage, refrigerant under pressure, and a New Hampshire winter that doesn't care if you're tired. The skull is a reminder that we take the job dead seriously so you never have to think about it.
The shamrock is the other half. A little luck never hurts. We'd just rather earn it.
Three rules. Every job.
Do it once
Size it right, install it right, test it right. A callback is a failure on our end, not a line item on yours.
Say it straight
What's wrong, what it costs, what we'd do in your shoes. No fear-selling, no mystery fees, no "while we're here."
Leave it clean
Drop cloths down, boots covered, mechanical room tidier than we found it. You'll know we were there because the house works — not because of the mess.
Let's talk about your house.
(774) 488-4093Free estimates on new equipment. Same-business-day callbacks on everything else.