Furnace Installation & Repair

Gas and electric furnace service. 24/7 emergency repair. Serving southeastern MA and Rhode Island since 1970.

💰 MA: Up to $9,500 in Mass Save rebates + 0% financing | RI: Up to $1,000/ton + Clean Heat RI incentives

Furnace Service for SE Massachusetts & Rhode Island

Furnace not keeping up? Making a noise it did not used to make? We repair gas and electric furnaces from any manufacturer, and we convert oil systems to gas. If a repair does not make financial sense, we tell you and quote a replacement instead.

New installations run on high-efficiency equipment from Carrier, Lennox, and Samsung.

Qualifying systems are eligible for Mass Save rebates in Massachusetts and RI Energy incentives in Rhode Island. Replacing an old oil furnace with a high-efficiency gas unit or heat pump can mean significant savings. See our Mass Save Rebates page for current details.

Gas & Electric

Gas and electric furnaces serviced

Mass Save Eligible

Rebates on qualifying systems

24/7 Emergency

No heat calls answered day and night

In-House Electrical

Panel and wiring by our own electricians

⭐⭐⭐⭐⭐ Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

Karen L.

Residential Customer

Get Your Free Assessment

Services Form — Triangle Mechanical (#5)

📞 Call (508) 501-7424

Fastest: call (508) 501-7424. Calls are answered around the clock, and emergencies get the on-call tech dispatched day or night.

Prefer the form? We typically get back to you within one business day.

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Our Installation Process & Brands

Free Assessment

We evaluate the space, measure rooms, and check your electrical panel. No cost, no obligation.

Custom System Design

We spec the right system for your home and put the price in writing before any work starts.

Professional Installation

Our licensed techs handle HVAC, electrical, and any panel upgrades. All in-house. No subcontractors.

System Training & Warranty

We walk you through the controls, register your warranty, and stand behind the work with a one-year labor guarantee.

What Does a Furnace Cost in SE MA / RI?

A new gas furnace installed costs $4,000 to $10,000. Home size and efficiency rating set the price. An 80% unit for a smaller Swansea colonial lands near the bottom. A 96% two-stage furnace for a larger home runs higher, and the fuel savings show up every winter after.

Switching from oil? The conversion is quoted as a single project because the gas line work comes with it.

The spread comes down to three things: the efficiency tier you pick, the condition of your existing ductwork, and what the venting needs. A straightforward swap costs less than an install that needs new venting on the way out.

Furnace repairs run $350 to $1,500 depending on the part and the labor involved. Ignitors and flame sensors are quick. Blower motors and control boards cost more. We quote before we start.

Rebates & Incentives (2026)

Rebate amounts depend on system type, efficiency rating, and whether you’re replacing fossil fuel equipment. Massachusetts projects fall under Mass Save. Rhode Island projects fall under RI Energy and Clean Heat RI, available through December 31, 2026. We confirm your eligibility.

Why Homeowners Choose Triangle for Furnace Service

In-House Electricians

Most HVAC installers sub out the panel work. That means two companies, two schedules, two invoices. Our own electricians handle the panel work. One company, one invoice.

Mass Save Participating Contractor

We know which systems qualify, what documentation the program requires, and where homeowners usually lose money by picking the wrong equipment tier. We confirm your eligibility before you spend a dollar.

55 Years. Not a Startup.

Rebate money brought a lot of new companies into this market. Triangle has been at 425 Pleasant Street in Fall River since 1970. When your compressor needs warranty service in 2030, we will still be here.

Four Trades, One Company

Getting a mini split and notice the water heater looks rough? Want a generator quote while we are there? Heating, cooling, plumbing, electrical, refrigeration. One call, one truck, one bill.

What Our Customers Say

⭐⭐⭐⭐⭐They diagnosed a heating problem we had for over 20 years that no one else could figure out — including one of the guys from This Old House. They didn't give up until they solved it. The owner Tom is wonderful and Neil is a real gem!

⭐⭐⭐⭐⭐Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

⭐⭐⭐⭐⭐ AJ, Chad, and Tony did an amazing job on our church's HVAC system. Professional, clean, and on time. Triangle treats every job like it matters.

⭐⭐⭐⭐⭐ Called on a Sunday night with no heat. They had someone at our house within an hour. Fixed it on the spot. Can't ask for more than that.

⭐⭐⭐⭐⭐ We use Triangle for all our rental properties. One call for heating, plumbing, electrical — they handle everything. Makes my life so much easier.

Furnace FAQ

How much does a new furnace cost?

Gas: $4,000 to $10,000 installed. Depends on size, efficiency, and whether gas line work is needed. Free estimates. Call (508) 501-7424.

Should I repair or replace my furnace?

If it is over 15 years old and the repair exceeds a third of replacement cost, replacing usually makes more sense. We give you both numbers side by side.

Do you repair all furnace brands?

Yes. Carrier, Lennox, Trane, Rheem, Samsung, Goodman, and others. We carry common parts on our trucks for faster repairs.

Can I switch from oil to gas?

If natural gas is available on your street, yes. We handle gas line installation and furnace install. Licensed for gas work in MA and RI.

Ready to Get Started?

Whether you need an emergency repair, a new installation, or a second opinion, Triangle is here to help. One call handles it all.