Brands · High-Efficiency Boilers · South Shore MA
Viessmann Condensing Boilers
Viessmann’s Vitodens line is the German-engineered benchmark in wall-hung condensing boilers — stainless steel heat exchangers, whisper-quiet operation, and efficiency in the mid-90s. When a homeowner wants the premium hydronic option and plans to stay in the house for decades, this is the boiler we reach for.
VIESSMANN
Explore the full Vitodens boiler lineup at viessmann-us.com → then call 3R for installed pricing.
High-efficiency boiler? We handle the incentive paperwork. Qualifying condensing boiler installs may be eligible for Mass Save rebates and 0% HEAT Loan financing — see current rebates for what applies in 2026.
Why Viessmann Earns the Premium
Most boiler failures start at the heat exchanger. Viessmann builds the Vitodens around a stainless steel Inox-Radial heat exchanger that resists the corrosion that eventually kills lesser designs, and pairs it with combustion management that continuously self-adjusts to gas quality and venting conditions. The result is a boiler that holds its efficiency year after year instead of drifting — provided it’s piped, vented, and commissioned correctly. That last part is where we come in: every 3R boiler install is set up with combustion analysis, outdoor reset dialed to your actual radiation, and clean primary/secondary piping you won’t be embarrassed to show off.
Stainless steel heart
The Inox-Radial stainless heat exchanger is built to outlast aluminum designs — it’s the component that decides whether a boiler makes it to year 20.
Quiet, compact, wall-hung
A Vitodens hangs on the wall, runs at a whisper, and frees up floor space — a favorite for finished basements and tight mechanical rooms.
Smart combustion
Self-calibrating combustion management adjusts to real-world gas and venting conditions, holding peak efficiency instead of drifting out of tune.
Hydronic Work, Done the 3R Way
A premium boiler deserves a premium install. Here’s the standard every 3R boiler room is held to — clean copper, proper circulation, and commissioning with instruments, not guesswork.
What We Install
Vitodens wall-hung condensing boilers for baseboard, radiator, and radiant systems — sized to your home’s actual heat loss, piped primary/secondary, paired with an indirect water heater where the household needs serious hot water, and commissioned with combustion analysis. We also service and maintain existing Viessmann equipment. Browse the lineup at viessmann-us.com, then talk to us about which model fits your system — or compare with Navien, Laars, and Lochinvar to see the full range we install.
Ready for a boiler that lasts?
Honest sizing, installed pricing, and incentives applied up front.