Right-sized by calculation
Manual J load calc room by room, so equipment matches the building instead of a rule of thumb.
AirPrime HVAC Design is an HVAC engineering and installation company in Ayer, Massachusetts. We design heating and cooling by calculation and install it to spec, for builders, contractors, and property managers who need it done right the first time.
On site · AirPrimeMost HVAC problems start on paper, not in the field. Equipment picked by habit instead of calculated for the building is what causes the short-cycling, the cold rooms, the failed inspection, and the callback. We built AirPrime to do the opposite: a room-by-room load calculation first, then equipment matched to it, then a clean install documented for sign-off.
We work across Massachusetts and Southern New Hampshire on new construction, renovations, retrofits, and repairs. The audience is professional, so the deliverable is professional: right-sized systems, code-compliant work, and the paperwork to prove it, handed over at close.
The same discipline whether it is one system or a multi-unit build.
Manual J load calc room by room, so equipment matches the building instead of a rule of thumb.
Work built to MA and NH code and manufacturer spec, with calcs, specs, and as-builts ready for inspection.
Quality materials and tidy, organized installs, sequenced around your other trades.
A written scope and clear pricing up front, so there are no surprises at handover.
A small, hands-on crew. You deal with the people doing the work, not a call center.



Based in Ayer, MA. If your project is in the region, we can quote it.
On the road across MA & NHSend the details and we’ll follow up to set up a site assessment and load calculation. No obligation, no cost to quote.