We retrofit Back Bay brownstones, we convert oil to heat pump in Lincoln colonials, and we install mini-splits in Cambridge triple-deckers without touching the crown molding. Three generations of craft — and every Mass Save rebate, filed for you.
We don't chase every job. We focus on the work our craftsmen do better than anyone in Massachusetts — and we say no to the rest.
Oil-to-heat-pump conversions across the Commonwealth. Mass Save rebates up to $10,000 filed for you. Cold-climate Mitsubishi & Fujitsu systems only.
Condensing gas & hydronic boilers for New England's older housing stock. 95%+ AFUE rating standard — and we preserve your existing radiators.
Cambridge triple-deckers, Beacon Hill townhouses, Lincoln capes. Ductless zones where duct retrofit isn't an option — and the lineset isn't visible.
$29/mo. Two precision tune-ups, priority scheduling, 20% off every repair. Our plan members come first — even in an ice storm.
My grandfather started Bluestone in 1962 installing oil boilers in Cambridge triple-deckers. My father converted half the South Shore from oil to gas in the 80s. Today we're converting those same homes from gas to heat pump — and Mass is paying half the bill.
Our installs are 30% slower than the average Boston HVAC company. On purpose. Manual J load calcs, hand-finished lineset covers, three-day commissioning. It's why our heat pumps still run in year 12 when everyone else's are dying in year 7.
A master tech walks your home, measures, and talks through options. 60–90 minutes.
Manual J sizing + engineered plan. We tell you exactly what equipment and why.
Flat price. Mass Save rebates pre-filed. No change orders mid-install.
Three-day commissioning, 6- & 12-month audits, lifetime labor warranty.
From Back Bay brownstones to Lincoln colonials to Cape Cod saltboxes. Two dispatch hubs: Cambridge HQ + Framingham.
Our 1894 brownstone on Marlborough Street had oil heat for 130 years. Four HVAC companies told us a heat pump retrofit was "impossible." Bluestone spent three hours measuring, came back with a concealed-lineset mini-split design that touches nothing historic, and filed our Mass Save rebate for $9,800. Brilliant work.
We've worked with Bluestone on three houses now. Peter's crew is unlike any other HVAC company I've encountered — they'll spend an extra half day making the lineset trim match the clapboards. Our electric bills are half what oil was. Worth every dollar above the cheap quote we almost took.
Bluestone installed our triple-decker mini-splits last fall. Every tenant has independent temperature control for the first time in 100 years. Peter personally commissioned each head, came back at 6 months to audit, and the whole job cost $2,200 less than the lowest competing quote because Mass Save rebates were pre-filed. Incredible.
A master tech — not a salesperson — walks your home and hands you a no-pressure plan. Mass Save rebate eligibility confirmed on the spot.