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Tankless Water Heater Installation in Waltham, MA

Tankless Water Heater Installation in Waltham, MA. Veteran-owned, Master Plumber, Mass Save registered, same-day service. Call (781) 242-2386 for a quote.

Tankless Water Heater Installation in Waltham, MA

Waltham’s housing varies dramatically by neighborhood — dense older two-families near Moody Street, mid-century single-family in the South Side and Lakeview. Each housing type drives different equipment selection. For tankless installs specifically, Waltham homeowners typically come to us for one of two reasons: their existing 50-gallon tank is finally giving out and they want endless hot water this time, or they’re planning a kitchen and bath renovation that will demand more hot water than the existing tank can supply.

Tankless Water Heater Brands We Install

Navien: Our most-installed tankless brand. Premium condensing units with built-in recirculation and lifetime heat exchanger warranties on premium models.

Rinnai: Long-time tankless leader with proven cold-climate performance.

Rheem: Strong mid-tier option with excellent serviceability.

AO Smith: Reliable tankless option with broad parts availability.

What’s Included in Tankless Installation

Pulling and disposing of the existing tank water heater. Resizing the gas line if necessary — most existing 1/2″ gas lines are too small for tankless and need to be upgraded to 3/4″ or 1″. Installing the new tankless unit on the wall with proper structural support. Running new vent to the exterior. Installing condensate drain and isolation valves. Pressure-testing the gas line. Pulling all required permits. Commissioning the unit.

Mass Save Rebates and Financing

Waltham homeowners qualify for Mass Save rebates on high-efficiency tankless water heaters. We are a registered Mass Save installer and handle the rebate paperwork. 0% HEAT Loan financing is available.

Why Choose Sedona for Tankless Installation in Waltham

Local dispatch from Winchester. 20 minutes from our shop to most Waltham addresses.

Master Plumber and licensed gas fitter. Tankless installs require gas line resizing. Veteran-owned, fully insured, .

Authorized installer for Navien, Rheem, Rinnai, AO Smith. Manufacturer warranties stay valid.

Upfront flat-rate pricing. Detailed written quote before work starts.

24/7 emergency response in Waltham.

Areas We Serve Near Waltham

Beyond Waltham, we install tankless water heaters in Belmont, Watertown, Newton, Lexington, Weston and surrounding communities.

Frequently Asked Questions about Tankless Installation in Waltham

How long does tankless water heater installation take in Waltham?

A standard tankless install (replacing an existing tank, gas line already correctly sized) takes about a full day. If the gas line needs resizing, add 4-8 hours.

Will a tankless really give me unlimited hot water?

Yes — but with a flow-rate limit. A typical residential tankless unit (180,000-199,000 BTU) supplies about 7-9 GPM in our New England climate. That’s enough for 2-3 simultaneous showers in most Waltham homes. For larger demand, we install paired tankless units.

How long does a tankless water heater last?

15-20+ years with annual descaling, vs 8-12 for a typical tank.

Can I qualify for Mass Save rebates on tankless in Waltham?

Yes — high-efficiency tankless water heaters qualify for Mass Save rebates. We handle the rebate paperwork.

Need tankless water heater installation in Waltham, MA? Call (781) 242-2386 or use the form on this page.


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