Brands · Hydronic Heating · South Shore MA
Lochinvar Knight & Noble Boilers
Lochinvar is one of the most respected names in high-efficiency hydronics — the Knight and Noble lines are stainless fire-tube condensing boilers that heating pros trust for a reason. When a boiler-heated home wants top-tier efficiency with a long service life, Lochinvar is on our short list.
We handle the rebate paperwork and apply it as a discount at signing. Qualifying high-efficiency Lochinvar boilers may be eligible for Mass Save incentives and 0% HEAT Loan financing — see current rebates for what applies in 2026.
The Pro’s High-Efficiency Boiler
Lochinvar’s stainless steel fire-tube heat exchangers are built for the long haul, and their smart controls modulate the flame to match what the house actually needs — so the boiler sips gas on mild days instead of blasting at full fire. A condensing boiler only hits its rated efficiency when the system around it is piped and set up correctly, which is why our installs include proper near-boiler piping, outdoor reset configuration, and combustion analysis at startup. The full process is on our boiler installation page.
Knight fire-tube
The flagship: stainless fire-tube heat exchanger, high turndown modulation, and smart controls — a premium condensing boiler with a long track record.
Noble combi & heating
Wall-hung Noble models handle heat — or heat plus domestic hot water in the combi version — at a friendlier price point than the Knight.
Commissioned right
Outdoor reset, combustion analysis, and correct near-boiler piping at startup — the setup work that turns rated efficiency into real fuel savings.
What We Install
Knight and Noble condensing boilers for baseboard, radiator, and radiant systems, Noble combi units for heat plus domestic hot water, and indirect water heaters paired to either — permitted, inspected, and commissioned with combustion analysis on every install. Learn more about the equipment at lochinvar.com, then call us for an installed price on your home.
Equipment & Specs
Lochinvar equipment we install
Lochinvar KNIGHT and NOBLE boilers we install. The product summaries list sizes, efficiency and venting; the brochures cover features.
KNIGHT Floor Boiler
Floor-standing stainless fire-tube condensing boiler. Built for multi-zone hydronic homes.
KNIGHT Wall Mount Boiler
Same fire-tube heat exchanger in a wall-hung package for tighter mechanical rooms.
NOBLE Wall Mount Boiler
Compact heat-only condensing boiler for baseboard and radiant systems.
NOBLE Combi Boiler
Space heating and on-demand domestic hot water from one wall-hung unit.
Spec sheets & brochures
- KNIGHT Floor – Product Summary (Specs)PDF · 57 KB
- KNIGHT Wall Mount – Product Summary (Specs)PDF · 63 KB
- KNIGHT Fire-Tube Boiler – BrochurePDF · 4.7 MB
- NOBLE Combi – Product Summary (Specs)PDF · 48 KB
- NOBLE Combi – BrochurePDF · 2.6 MB
- Consumer Guide to Home ComfortPDF · 7.7 MB
lochinvar.com residential boilers ↗
Product images and documents are from Lochinvar and are shown for reference. Lochinvar and its logo are trademarks of their respective owner. Specs can change — we confirm model details and sizing on site before quoting.
Videos
See Lochinvar equipment in action
Short videos on the Lochinvar equipment we install.
KNIGHT Floor Boiler – Features & Benefits
KNIGHT Wall Mount Boiler
NOBLE Combination Boiler
Lochinvar Installations by 3R
A Lochinvar condensing boiler installed by our crew, with near-boiler piping and controls set up for the home’s heating zones and commissioned with combustion analysis at startup.
FAQ
Lochinvar questions we hear most
What’s the difference between KNIGHT and NOBLE?
KNIGHT is Lochinvar’s flagship stainless fire-tube boiler, available floor-standing or wall-hung, with advanced controls for multi-zone systems. NOBLE is a compact wall-hung boiler, available heat-only or as a combi, at a lower price point. We recommend one or the other based on your heat loss, zones and hot water needs.
Can a Lochinvar boiler make my hot water too?
Yes. The NOBLE combi makes domestic hot water on demand. KNIGHT and NOBLE heat-only boilers pair with an indirect water heater, which is the better choice for homes with several bathrooms.
Can it run on propane?
Yes. Lochinvar residential boilers can be set up for natural gas or propane (LP). We confirm gas type, pipe size and supply pressure before we install.
Does it need yearly maintenance?
Yes. A condensing boiler needs an annual service: combustion analysis, heat exchanger and burner inspection, condensate trap and neutralizer cleaning, and a check of the controls and safeties. The Total Care Club keeps it on schedule.
What warranty comes with a Lochinvar?
Warranty terms vary by model — see the product summary or brochure for your unit. We register the equipment for you, and keeping up annual maintenance helps keep the warranty valid.
Are there rebates for a new Lochinvar boiler?
Qualifying high-efficiency equipment may be eligible for Mass Save rebates and 0% HEAT Loan financing. See our current rebates page — we handle the paperwork.
Ready for a high-efficiency boiler?
Sized to your system, commissioned with instruments, priced installed.