Prime Build & Comfort
Prime technician working on a furnace and ductwork connection in an attic

Winter-ready service · Waltham, MA

Dependable heat in Waltham, all winter long.

Furnace, boiler, and heat pump service for homes and businesses in Waltham, ready before the cold hits.

Furnace, boiler, and heat pump service in Waltham, ready before the cold hits.

Call (774) 417-0596

Licensed & Insured

5.0 on Google · 20 reviews

“Our boiler stopped heating properly and we called Prime Build & Comfort. They came out, inspected everything and repaired the issue quickly…”

Lucas Do Vale Verified Google review

Two Prime technicians lifting an air handler into place in an attic

Heating in Waltham

Heat that holds when winter tests it.

Waltham sits in Middlesex County just west of Boston, well within our regular heating coverage across Greater Boston and eastern Massachusetts.

  • Furnaces
  • Boilers
  • Heat pumps

We also serve nearby Middlesex County communities, including Newton and Malden.

What we cover

Furnaces, heat pumps, boilers, and the hydronic and duct systems that carry the heat, repaired, installed, and maintained.

Furnaces

Warm air, delivered through the ductwork you already have.

Furnace Repair

No heat, short cycling, or a burner that will not stay lit. We trace the fault through the ignitor, flame sensor, blower, and control board instead of guessing at a full swap.

Furnace Installation

A replacement sized to your ductwork and fuel type when a furnace is done for good, combustion tested and commissioned before we call it finished.

Furnace Maintenance

A seasonal check on burner, exhaust, thermostat, and filter, the visit that catches a failing ignitor before it strands you on the coldest night of the year.

Heat Pumps

One system that heats and cools, sized for a New England winter.

Heat Pump Repair

A unit that will not hold temperature, short cycles, or struggles through a defrost cycle. We check refrigerant charge, the reversing valve, and controls to find what is actually failing.

Heat Pump Installation

Cold-climate heat pumps sized with a real load calculation, not a nameplate swap, so the system keeps up well below freezing instead of leaning on backup heat all winter.

Boilers

Steady, quiet heat for radiators, baseboard, and in-floor tubing.

Boiler Repair

A boiler that will not fire, loses pressure, or leaves radiators cold at the far end of the house. We track the fault through the burner, circulator, and controls.

Boiler Installation

A new or replacement boiler matched to your existing distribution, piped and commissioned to run efficiently through a full heating season.

Hydronic Heating & Ductwork

The distribution side of the system, radiant loops and the ducts that carry warm air.

Hydronic Heating

Radiant and hot-water heat, from baseboard loops to in-floor tubing, balanced zone by zone so no room runs hot while another stays cold.

Ductwork

Sealed, properly sized ductwork so the air a furnace or heat pump produces actually reaches the room it was meant for.

Our process

How a heating job actually goes.

  1. 01

    Free quote

    A call and a straight estimate, no obligation.

  2. 02

    On-site assessment

    A real load calculation, not a phone guess.

  3. 03

    Clean install or fast repair

    Tidy work, done right the first time.

  4. 04

    Tested before we leave

    Combustion, controls, and safety checked and commissioned.

Ready to get your heat sorted in Waltham?

Why Prime

One crew, straight answers.

  • Licensed and insured

    Full credentials and coverage on every visit, no exceptions.

  • Honest, no upsell

    A straight repair-or-replace answer, not a push toward the bigger job.

  • Fast when the cold hits

    We answer our own phone and move quickly on no-heat calls.

  • Clean, finished work

    Tidy installs and tested systems, not just switched on and left.

  • Homes and commercial

    One crew for single-family heat and multi-zone commercial systems.

Fall tune-up

Get your furnace looked at before it has to fight the cold alone.

We check the burner, the exhaust, the thermostat, and swap the filter, about an hour, at your place. It’s the same visit that catches a bad ignitor before it strands you on the coldest night of the year.

Winter demand is picking up, book your tune-up now.

Grab a tune-up slot
A Prime technician servicing a furnace in an attic

When to call

When the heat can't keep up.

  • The boiler that short-cycles every January.
  • A room that never gets warm no matter what you try.
  • Banging, rattling, or a burning smell on startup.
  • No heat at all, especially during a cold snap.

No heat right now in Waltham? Don’t wait it out.

Where we work

Waltham heating,
and the region around it.

Waltham is in Middlesex County, one of the six Massachusetts counties we run heating calls across. If you're in our service area, we can get someone out before the next cold snap.

See all heating service areas

Middlesex County · Homes and businesses

Reviews

What our Waltham clients say.

G Google 5.0 Showing 5 of 20 reviews
  • Rated 5 out of 5
    Our boiler stopped heating properly and we called Prime Build & Comfort. They came out, inspected everything and repaired the issue quickly. What I appreciated most was that they explained what was wrong and did not try to push unnecessary replacements. Honest company and very knowledgeable about heating systems.
    Lucas Do ValeG Verified Google review
  • Rated 5 out of 5
    Great job. I called and they came the same day and replaced my AC and furnace in one day. They even let me use a portable AC in the meantime.
    Francisco Reyes FloresG Verified Google review
  • Rated 5 out of 5
    They did a great job! Install was fast and on schedule. Very good customer service too! I recommend them highly!
    Roger DeckerG Verified Google review
  • Rated 5 out of 5
    Very professional, answers calls right away, punctual and they did a great job.
    Ferg McG Verified Google review
  • Rated 5 out of 5
    Robert and his team are knowledgeable, punctual, and keep things running smoothly on the job site. Highly recommend them.
    Magalhaes Group ConstructionG Verified Google review
  • Rated 5 out of 5
    Our boiler stopped heating properly and we called Prime Build & Comfort. They came out, inspected everything and repaired the issue quickly. What I appreciated most was that they explained what was wrong and did not try to push unnecessary replacements. Honest company and very knowledgeable about heating systems.
    Lucas Do ValeG Verified Google review
  • Rated 5 out of 5
    Great job. I called and they came the same day and replaced my AC and furnace in one day. They even let me use a portable AC in the meantime.
    Francisco Reyes FloresG Verified Google review
  • Rated 5 out of 5
    They did a great job! Install was fast and on schedule. Very good customer service too! I recommend them highly!
    Roger DeckerG Verified Google review
  • Rated 5 out of 5
    Very professional, answers calls right away, punctual and they did a great job.
    Ferg McG Verified Google review
  • Rated 5 out of 5
    Robert and his team are knowledgeable, punctual, and keep things running smoothly on the job site. Highly recommend them.
    Magalhaes Group ConstructionG Verified Google review
Read our reviews on Google

FAQ

Heating questions, answered.

Furnace, boiler, or heat pump, which is right for my home?
It depends on what is already there. A furnace heats air and pushes it through ductwork, so it warms quickly and can share ducts with central air. A boiler heats water for radiators, baseboard, or in-floor tubing, the steady radiant warmth many older New England homes were built around. A heat pump moves heat instead of burning fuel and both heats and cools. The right fit depends on your existing distribution, your fuel, and your comfort goals, which we confirm on site before recommending anything.
How fast can someone come out when there is no heat?
No-heat calls jump the line, especially in the middle of a cold snap. We answer our own phone, so you are talking to someone who can actually get you on the schedule, not a call center reading a script. Most no-heat calls in our area get seen the same day or the next morning.
Do heat pumps keep up in a New England winter?
Yes. Cold-climate heat pumps use variable-speed compressors built to keep heating well below freezing, with strong efficiency at 5 degrees. Boston-area winters see only a handful of truly sub-zero nights, so a properly sized cold-climate unit carries most of the season, and systems are designed with backup heat for the coldest snaps. Correct sizing is what makes the difference.
Do you handle commercial and light-commercial heating?
Yes, we serve both homes and businesses. Commercial buildings often use rooftop package units and larger multi-zone systems or commercial boilers. Because downtime affects tenants, staff, and customers, commercial heating benefits from planned maintenance, and we tailor the approach to the building and its use.
When's the best time to schedule a heating tune-up?
Before the cold arrives. Demand jumps with the first real cold snap of the season, and the schedule fills up fast once that happens. Booking in the fall means a technician can check combustion and safety, controls, thermostat, and filter while there is still room on the calendar, instead of waiting for a breakdown in January.
A Prime technician ready to help with a heating job

Prefer to talk?

(774) 417-0596
  • Licensed & insured
  • We answer our own phone

Get a quote

Request your free quote

Tell us about the system and we will follow up fast with real numbers, not a phone guess.

No pressure, no obligation. Prefer to talk? Call (774) 417-0596.

Thanks, we've got it.

We will call you back fast. For anything urgent, call (774) 417-0596.

Call Book tune-up