Water Heaters
Dependable hot water — tank or tankless — installed right and built to last.
Tank & Tankless Options · Repair & Replacement · Energy-Efficient Upgrades
Our Approach to Water Heaters
How a Tank Water Heater Works
- Cold inlet — the dip tube carries it to the tank bottom
- Burner — heats water at the bottom of the tank
- Anode rod — sacrificial rod that fights corrosion
- T&P valve — releases pressure if it builds too high
- Hot outlet — draws the hottest water from the top
When your water heater fails, you need it fixed fast. J&R Mechanical Services provides water heater replacement and service for both traditional tank and tankless systems.
If your water heater is leaking, not producing enough hot water, or has simply reached the end of its lifespan, we can assess the situation and recommend the best replacement option for your home and budget. Our leak repair team can also address any water damage caused by a failing unit. We handle the removal of your old unit and installation of the new one efficiently and cleanly.
Considering a tankless water heater? Our tankless water heater installations provide endless hot water while taking up less space. We will help you determine if tankless is right for your household based on your hot water usage and plumbing configuration.
Every water heater installation includes proper venting, connections, and safety checks. We test everything thoroughly before we leave and walk you through how your new system works.
Our Approach
We do not push the most expensive option. We help you find the right water heater for your home, install it properly, and make sure you have reliable hot water for years to come.
Water Heaters Services
Equipment We Work On
Serving Augusta & Brunswick
Efficiency Maine
Rebates & Guidance
- Rebate
$1,150 off a heat pump water heater
Efficiency Maine offers a $1,150 instant discount at participating retailers (or a mail-in rebate) on a qualifying heat pump water heater.
Source: Efficiency Maine - Recommendation
Give a heat pump water heater the right space
A heat pump water heater needs a room with at least 6-foot ceilings and a condensate drain, and it works best in an unheated or semi-heated space - installing it in a warm living area reduces its efficiency.
Source: Efficiency Maine - By the numbers
Lifetime savings vs. electric water heaters
Efficiency Maine estimates a heat pump water heater can save a homeowner more than $5,000 over its lifetime compared with a standard electric-resistance water heater.
Source: Efficiency Maine
Program details as of Sep 26, 2026. Rebate amounts and eligibility change; confirm current terms at efficiencymaine.com.
Water Heater Types, Efficiency, and Brands
Five different water heater technologies show up in Maine homes, and picking between them starts with two numbers: the Uniform Energy Factor (UEF), which is how the U.S. Department of Energy's test procedure scores efficiency across every type on one scale, and the unit's expected service life. Both numbers vary a lot by type — a heat pump water heater and a standard electric tank can carry the same voltage and outlet, and one can cost a third as much to run as the other.
The brand sections below cover five widely installed water heater manufacturers — A.O. Smith, Rheem, Bradford White, Navien, and Rinnai — each with the residential line the manufacturer itself currently markets as its flagship. Two of the five (A.O. Smith and Rheem) sell across every format in this table under one roof; the other three lean toward a specific technology, which says something about where each brand puts its engineering effort. We're an Efficiency Maine Registered Residential Vendor, and Efficiency Maine's current heat pump water heater incentive is covered at the end.
Comparing Water Heater Types
UEF ratings aren't directly comparable across fuel types in an intuitive way — a gas UEF of 0.86 and a heat pump UEF of 3.30 don't mean the heat pump is "four times" the gas unit, because the heat pump is moving existing heat from the surrounding air rather than generating it from fuel or resistance wire. Within a type, though, a higher UEF means lower operating cost for the same hot water output, and DOE's test procedure is what makes that comparison apples-to-apples on the yellow EnergyGuide label every new water heater carries.
- Electric and gas tank units are rated and sold the same way most homeowners already know: by tank gallons, with UEF as the efficiency figure on the label.
- Heat pump water heaters are electric storage tanks with a heat-pump module on top that pulls heat from the surrounding air, which is why they need a space that stays above roughly 40–90°F and has enough air volume to draw from.
- Tankless units are rated the same UEF way but sized by maximum flow rate (gallons per minute) at a given temperature rise, not by tank volume, since there's no tank to hold a reserve.
- Indirect water heaters don't appear in ENERGY STAR's water heater program at all — they're sized and specified as part of the boiler system, not as a standalone appliance.
| Type | Typical UEF | Typical service life |
|---|---|---|
| Electric tank (storage) | Standard electric resistance storage runs roughly 0.90–0.95 UEF already, since there's no flue loss; ENERGY STAR doesn't set a separate high-efficiency tier for standard electric storage the way it does for heat pump models. | ENERGY STAR's own replacement guidance flags planning for replacement once a unit passes 10 years old. |
| Gas or propane tank (storage) | ENERGY STAR requires UEF ≥ 0.81 (medium draw, tanks 55 gallons or smaller) or ≥ 0.86 (high draw, or any tank over 55 gallons) to qualify as high-efficiency. | Same 10-year replacement-planning guidance from ENERGY STAR. |
| Heat pump water heater (integrated) | ENERGY STAR requires UEF ≥ 3.30 for a standard integrated unit (≥ 2.20 for 120V/15A and split-system models). DOE's federal cost-analysis documentation lists a best-available model at 3.93 UEF. | DOE's federal cost analysis for ENERGY STAR heat pump water heaters assumes a 13-year product life. |
| Gas tankless (demand) | ENERGY STAR requires UEF ≥ 0.95 to qualify as a high-efficiency whole-home tankless unit. | DOE doesn't publish an independent lifespan figure for tankless the way it does for heat pump models. Manufacturers commonly market tankless units for longer service than tank models, provided the heat exchanger is descaled on the manufacturer's schedule. |
| Indirect (off a boiler) | An indirect water heater has no burner or element of its own — it's a storage tank heated by the boiler's water loop — so DOE doesn't assign it an independent UEF. Its practical efficiency rides on the boiler's own AFUE rating and how well the two are matched. | Tank construction and lifespan track a standard storage tank; the boiler supplying it has its own separate service life. |
A.O. Smith — ProLine XE
A.O. Smith markets ProLine XE as its top residential tier, spanning gas tank, electric tank, hybrid heat pump, and gas tankless models under one line name — commercial-grade components and A.O. Smith's longer warranty coverage are the common thread across the format.
Rheem — ProTerra
Rheem's flagship residential offering is the ProTerra hybrid electric heat pump water heater, which the company markets as its most efficient residential water heater — the format that lets a household reach the ENERGY STAR UEF tiers above 3.30 rather than the roughly 0.86 ceiling of even a high-efficiency gas tank. Rheem also sells the Maximus high-efficiency gas tank line for households that need a gas-fired flagship instead.
Bradford White — AeroTherm G2
Bradford White, a brand sold primarily through plumbing wholesalers rather than big-box retail, features the AeroTherm G2 heat pump water heater as its current flagship residential electric product.
Navien — NPE Series
Navien's residential flagship is its NPE condensing tankless series (NPE-A2 and NPE-S2), an ultra-high-efficiency gas tankless line built around a stainless-steel condensing heat exchanger. Navien's residential lineup centers on tankless models — unlike A.O. Smith or Rheem, it isn't also selling a conventional tank line alongside it.
Rinnai — SENSEI RX Series
Rinnai's flagship is the SENSEI RX series (led by the RXP model), a condensing tankless line built around smart-home connectivity and self-diagnostics on top of the tankless format Rinnai has built its US residential business on. Like Navien, Rinnai's US residential lineup centers on tankless rather than tank models.
Efficiency Maine's Heat Pump Water Heater Program
As of this writing, Efficiency Maine offers a $1,150 incentive on qualifying heat pump water heaters, delivered either as an instant discount at the register through participating distributors and retailers, or as a mail-in rebate if you buy elsewhere. The program lists specific partner pricing after the instant discount — figures like $349 at Granite Group, $399 at Selco, $400 at Lowe's, and $549 at Home Depot for a 50-gallon unit — though retail pricing changes, so the program page is the source of truth for current numbers. Efficiency Maine's own case for the technology is straightforward: heat pump water heaters produce plenty of hot water, help dehumidify the space they're installed in (basements benefit from this), and the program estimates savings of more than $500 a year on electricity compared with a standard electric tank.
Eligibility is straightforward: the unit must be new, ENERGY STAR certified, and installed in Maine, and it does not have to be installed by a Registered Vendor to qualify. A mail-in rebate needs to be submitted within six months of purchase with a receipt or invoice showing the purchase date, price, and model number. Only one heat pump water heater incentive is allowed per installation address per calendar year, and the instant discount and mail-in rebate can't be combined on the same unit.
Efficiency Maine's incentive applies to any ENERGY STAR-certified heat pump water heater, in any tank size — it isn't limited to a short list of specific models.
Sources: ENERGY STAR — Residential Water Heaters Key Product Criteria · U.S. DOE (FEMP) — Purchasing Energy-Efficient Residential Water Heaters · ENERGY STAR — When Should You Replace Your Water Heater · Efficiency Maine — Heat Pump Water Heater Incentives · A.O. Smith (hotwater.com) — ProLine XE · Rheem Residential Water Heating — ProTerra and Maximus · Bradford White — AeroTherm G2 Heat Pump Water Heater · Navien — NPE Series · Rinnai — SENSEI RX Series Tankless Water Heaters
Brand names and logos are trademarks of their respective owners, shown only to identify the equipment discussed. J&R Mechanical Services is an independent contractor and is not affiliated with or endorsed by these manufacturers.
Water Heaters FAQs
How long does a water heater last?
Tank units commonly last 8–12 years; tankless units run 20 or more with annual descaling. A tank past 10 years with rust-colored hot water or moisture at the base is on borrowed time — replace it before it fails, not after it floods the basement.
Tank or tankless — which is right for my home?
Tankless gives endless hot water and saves space, but needs a properly sized unit and often a larger gas line. Tank units cost less up front and work with any fuel. We size either from your actual usage, not a rule of thumb.
What drives the cost of a water heater replacement?
Fuel type, venting, gas piping, and any code-required upgrades (like an expansion tank) all move the price. We quote it up front once we see the install.
Can you replace a failed water heater quickly?
Often yes for standard tank units — call and we can talk through scheduling. Tankless and heat pump water heaters typically take a bit more lead time to source and install.
More Ways We Can Help
Google ReviewsCompany
5Get to know J&R Mechanical Services through…
Services
30Homeowners often pair this with our other offerings, including…
Service Areas
9We cover Kennebec and Cumberland County, including…
Get a Quote
Request Service
Fill out the form below to request an estimate or schedule service.
“*” indicates required fields
Need it today?Call (207) 902-8899