New and replacement tankless units

Tankless Water Heater Installation Across the CT Shoreline and River Valley

Guild Water Heater Experts installs and replaces tankless water heaters across the CT Shoreline and River Valley. We size each unit for Connecticut winter water temperatures, so your showers stay hot in January, not just in July.

  • Licensed and insured in CT
  • Owner-operated since 2022
  • $80 on-site estimate, credited to the job
Wall-hung combi unit installed among copper and red and blue PEX lines in an older basement
Google reviews

What our customers say

Straight from Google, posted by homeowners across the CT Shoreline and River Valley.

See all reviews

A tankless water heater heats water only when you turn on a faucet, so there is no tank to keep hot. It needs the right gas supply, venting and sizing to work well. We install new units and replace worn out tankless heaters, starting with an $80 on-site estimate credited to the job.

Signs you need tankless water heater installation

Tankless units are a good fit for many homes, but not every home. These are the signs that tankless installation or a tankless replacement makes sense for you.

  • Repeated codes on an older unit can mean worn parts or scale damage inside the heat exchanger.
  • The unit may be undersized for your flow, especially in winter when incoming water is colder.
  • Older units lose efficiency and parts get harder to find.
  • A correctly sized tankless unit keeps up as long as the faucet runs.
  • A wall-mounted unit frees up the corner where a tank used to stand.
  • New fixtures are a good time to rethink how you heat water.

Wondering if a tankless water heater fits your home? Call and we will talk through your gas supply and hot water use. Call (860) 510-6899

How long it takes

Tankless for tankless replacementAbout half a dayExisting gas line and venting reused where they meet the new unit's specs.
New tankless installationOne to two daysIncludes new gas piping, venting and wall mounting.
Adding service valves to an older unitAbout 1 to 2 hoursMakes yearly descaling faster.
Estimate visitAbout 45 to 60 minutesWe check gas supply, venting route and fixtures.

From our job photos

Fittings, valves and manifold parts laid out on a work table before installation
Step one: every fitting, valve and manifold part sorted and checked before anything goes on the wall.
Underside of a combi unit on a work table with brass service valves attached
Brass isolation valves fitted to the unit first. They let us flush it later without cutting pipes.
Combi unit on a work table with a stainless steel manifold attached to its connections
The manifold attached on the bench, so the wall work goes faster and cleaner.

How tankless water heater installation works with us

  1. Measure your hot water demand

    We count fixtures and talk about how your household uses hot water at the same time, so the unit is sized right.
  2. Check gas and venting

    Tankless units draw a lot of gas while running. We check meter size, line size and where the vent can exit.
  3. Mount and pipe the unit

    The unit goes on the wall with isolation valves, which let us flush it later without cutting pipes.
  4. Vent and connect

    We run the venting, connect gas and water, and route the condensate drain if the unit needs one.
  5. Fire, test and set up

    We test flow at several taps, check for leaks, set the temperature and show you the controls.

Ready to schedule your tankless water heater installation?

Serving the CT Shoreline and River Valley. Call to talk through your job, or book an $80 on-site estimate online. It comes off your bill.

What affects the price

Tankless installation costs more up front than a tank, mostly because of the gas line and venting work, not the unit itself. A replacement of an existing tankless unit is usually simpler. We price your job after the $80 on-site estimate, which is credited toward the work.

  • Unit sizeBigger units cover more fixtures at once and cost more.
  • Gas line sizeMany homes need a larger gas line to feed a tankless unit.
  • Venting routeA short run through an outside wall costs less than a long run.
  • Fuel typeNatural gas and propane units differ, and propane tanks may need regulator checks.
  • Water qualityHard well water may call for treatment to protect the heat exchanger.
  • Existing setupReusing sound piping and venting from an old tankless unit lowers cost.

Every price is confirmed at your $80 on-site estimate, never guessed over the phone.

Connecticut rebates and incentives

Connecticut homeowners may qualify for rebates, low-cost loans or income-based help when they replace a water heater. Most current water heater rebates are for high-efficiency heat pump models. Amounts, eligibility and installer requirements change each year, so check the program pages below before you buy.

Licensed, insured and owner-operated

Licensed in Connecticut

CT heating license HTG.0410608-S1 and plumbing license PLM.0292074-P2.

Fully insured

Your home and our crew are covered on every job we take on.

Owner-operated since 2022

Erik Anderson Sr. runs the company and answers for the work himself.

$80 estimate, credited

The on-site estimate fee comes off your bill when you go ahead.

Local water and the seasons

Groundwater in Connecticut gets cold in winter. A tankless unit has to raise that water much further in January than in August, so its flow rate drops. A unit sized from a summer guess can leave you with lukewarm showers in February. We size for winter.

Many homes in the smaller valley and shoreline towns are on private wells, and hard water builds scale inside tankless heat exchangers. Service valves and a yearly descale keep the unit running. In homes without natural gas, propane tankless units are common, and the tank and regulator need to keep up with the demand.

Common Questions

Is a tankless water heater worth it in Connecticut?

For many households, yes. Tankless units use fuel only when you run hot water and take up almost no floor space. The catch is upfront cost and winter sizing, since colder groundwater lowers the flow a unit can deliver. A correctly sized unit with yearly descaling usually lasts 20 years or more.

Who installs tankless water heaters near Chester, CT?

Guild Water Heater Experts installs and replaces tankless water heaters in Chester and across the CT Shoreline and River Valley, from Middletown to New Haven to New London. We hold Connecticut heating and plumbing licenses, so the gas line, venting and water piping are handled by one company.

Can a tankless water heater run on propane?

Yes. Many tankless models come in propane versions, which is useful in Connecticut towns where natural gas service is limited. The propane tank, regulator and gas line all have to keep up with the unit's demand while it runs. We check those before recommending a propane tankless setup.

Frequently Asked Questions

Many tankless water heaters last about 20 years with yearly care, which is longer than a typical tank. Hard water is the main thing that shortens their life, because scale builds up inside the heat exchanger. A yearly descale, made easy by service valves, is the best way to protect the unit.

It will keep heating as long as water flows, but only up to its flow rate. If you run more showers and appliances than the unit can heat at once, the water cools. That is why sizing matters. We size for your fixtures and for cold winter water, not an average day.

Tankless units burn a lot of gas for a short time while hot water runs. A gas line sized for an old tank may not deliver enough, and the unit then shuts down or runs cool. We check line size and length against the unit's needs before installing.

Yes. If your existing tankless unit is worn out or failing, we can replace it with a new one. When the gas line and venting meet the new unit's requirements, we reuse them, which keeps the job shorter and lowers cost. If you are switching from a tank, see our tank to tankless conversions.

Yes. Most manufacturers call for a yearly descale, where a cleaning solution is pumped through the unit to remove mineral build-up. Homes on hard well water may need it more often. Skipping descaling can cause error codes, lower flow and a shorter life for the heat exchanger.

Related water heater services

Compare options or see all our water heater services, then book an estimate.

Tank-to-Tankless Conversion

Conversion from a tank water heater to a tankless unit, including gas line upsizing, new venting, wall mounting and removal of the old tank.

Water Heater Maintenance

Yearly tank flushing, anode rod inspection and replacement, and tankless descaling to help water heaters last longer and run efficiently.

Water Heater Repair

Repair of gas, electric and tankless water heaters, including no hot water calls, leaks, pilot and ignition problems, and noisy tanks.

Book tankless water heater installation across the CT Shoreline and River Valley

Call Guild Water Heater Experts or book online. Your $80 on-site estimate comes off the bill when you book the work.