Tankless Water Heater Installation in New Hampshire
Most people who dislike their tankless water heater don't have a bad unit. They have a good unit fed by an undersized gas line, vented on the cheap, or sized off a catalog number that assumed warmer water than New Hampshire actually has.
Tankless works here. It just has to be installed for here. In Hot Water sizes to real winter inlet temperatures, verifies gas capacity for the whole house, and runs venting and condensate the way the manufacturer and the code both require. We're veteran-owned, based in Litchfield, and backed by the 30 plus year reputation of Jolt Electric & HVAC.
If a tank is the better fit for your home, we'll tell you that too.
Hot Water Experts, Built on Full-System Expertise.
As your local water heater experts serving southern New Hampshire, we specialize in installation, repair, replacement, and maintenance for all types of water heaters. Whether you are dealing with an emergency breakdown or planning an upgrade, our team is here to help with fast service and honest recommendations.
System-First
Mindset
We diagnose the root cause, not just the symptom.
Precision
Installs
Tighter connections, better sizing, and smarter efficiency.
Zero
Noise
Clear communication and honest pricing. No fluff, just results.
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What a Tankless Installation Actually Involves
Three infrastructure items decide whether this job goes well, and all three cost money that a lowball quote quietly leaves out.
Gas comes first. A whole-home tankless unit can demand 150,000 to 199,000 BTU (the measure of how much heat the burner puts out) on full fire, several times what the tank it replaced used. If the existing gas line was sized for a small 40,000 BTU tank, it has to be upsized or the unit will starve for gas and shut itself down under load. We check the meter capacity and the whole house's total gas demand, not just the run to the heater.
Venting comes second: its own sealed venting run, built to the exact spec this unit requires, terminated where snow and ice can't block it. Condensate comes third, since these units produce acidic water as they run, which needs its own drain line and usually a neutralizer to make it safe to drain.
A tankless installation includes
- -Gas line sized to full-fire demand.
-Meter capacity and whole-house load verified.
-Dedicated sealed venting run.
-Vent termination clear of snow and intakes.
-Condensate drain and neutralizer.
-Wall mount that frees up the floor.
-Permit pulled and inspection scheduled.
-Recirculation or buffer tank when the layout needs it.
We handle every step of the process, from removing your old unit to ensuring your new system is installed safely and up to code. Our goal is to set you up with reliable hot water you can count on every day.
Sizing for a New Hampshire Winter, Not a Catalog Number
Every tankless unit is advertised at a flow rate tied to a specific temperature rise, and that rise is almost never the one your house has in January.
Groundwater here runs cold. Lifting it to a comfortable 120 degrees in the dead of winter takes a much bigger rise than the same unit needs in July, and available flow drops as the rise climbs. A unit that looks impressive on the box can deliver roughly half of that on the coldest morning of the year. That's how a house ends up with two showers that can't run at once.
So we measure your incoming water temperature, count your simultaneous-use fixtures, and size to the winter condition instead of the catalog.
Isolation valves for future descaling
Gas line pressure-tested after resizing
Vent pitched back to the unit
Dedicated circuit for built-in freeze protection
Winter sizing is only half of it. The rest is the install work that gets quietly skipped when a quote comes in low:
Worth It, With Eyes Open
Endless hot water and a footprint about the size of a carry-on suitcase, since there's no tank taking up floor space. Tankless units also last 20 years or more, roughly double the 10 to 15 years you get out of a standard tank. They run more efficiently too. A modern tankless heater turns about 95 cents of every dollar of gas into hot water for you. An older tank-style heater only manages around 60 cents on the dollar. That gap shows up on your utility bill every month.
The tradeoffs are real too. The unit costs more to install upfront. Hard well water means it needs a cleaning, called descaling, every six to twelve months to clear out mineral buildup. And if the power goes out, you have no hot water at all, which matters more here than most places, because the unit needs electricity to run its own freeze protection. An unprotected tankless heater sitting in an unheated space during a January outage is at real risk of freezing.
We install every major type of tankless setup, including:
- Condensing whole-home tankless units. Non-condensing and outdoor-rated tankless units. Multi-unit banks for high simultaneous demand. Recirculation and point-of-use setups.
We'll lay both columns out for you before you commit, with your house and your water in the math. If a storage tank turns out to be the better fit for how your home is plumbed, we'll say so up front instead of selling you something that disappoints you every February.
And if you already have a tankless unit aging out, swapping it is straightforward work for us.
Schedule Your New Hampshire Tankless Water Heater Installation
Call In Hot Water or request your estimate online, and we'll start with the two things that actually decide the outcome: your gas capacity and your winter water temperature.
You'll get a straight answer on whether tankless fits your home, a real number, and an install done to code the first time. We serve homeowners across southern New Hampshire and the surrounding towns. Never run cold again.