RELIANCE WATER HEATERS FPTU-50 1**
3.35 UEF DOE CCD · 2026-09-19Grade B: where this UEF sits among the 426 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
If you are checking the RELIANCE WATER HEATERS FPTU-50 1**, this electric tank uses 970 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 2,561 kWh below its class median of 3,531 kWh. It ranks 101st lowest in energy use of 426 electric tanks at this pattern.
Energy use per year
970 kWh a year
Computed by this site from the registry's UEF and the federal test's daily hot-water draw for this draw pattern. What it costs depends on the electricity rate where you live.
That is below the median of 3,531 kWh for the 426 models registered in the same heater type and draw pattern; it ranks 101 of 426, lowest energy first.
Solid line: this model (970 kWh). Dashed line: the class median.
Min 773 kWh Median 3,531 kWh Max 3,569 kWh
What it costs to run where you live
What the registry files
- UEF (Uniform Energy Factor) how much hot water you get for each unit of energy the heater uses
- 3.35 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the medium draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- Medium DOE CCD · 2026-09-19
- First Hour Rating how many gallons of hot water the unit can deliver in one hour, starting from a full tank
- 66 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 46 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2019-04-05 ENERGY STAR · 2026-09-19
- Connected / demand response (ENERGY STAR) whether the unit can take signals from your utility to shift when it heats, and by which standard (such as CTA-2045)
- No ENERGY STAR · 2026-09-19
- Refrigerant and GWP (ENERGY STAR) the refrigerant a heat pump unit uses and its global warming potential, a leak's climate effect relative to carbon dioxide (CO2 = 1)
- R-134a, GWP 1430 ENERGY STAR · 2026-09-19
What it costs to install
$3,011–$4,010 installed
Not a quote — a modeled range of what installers have charged for this class of unit; your price will vary with labor rates, access, and local code requirements.
Escalation indexes: equipment (BLS PPI) latest available: August 2026; labor (BLS ECI) latest available: April 2026 to June 2026.
NLR REMDB (BLS PPI/ECI escalated) · 2026-04-01Safety record
No CPSC recall names this model.
Checked against the CPSC recall database. CPSC does not publish a model-level match for this product category, so this list is curated by hand from the manufacturer's recall filings.
CPSC · 2026-09-24Does it fit your space?
Enter your own numbers below — this compares them to what ENERGY STAR publishes for this model, it does not tell you what to buy.
- Compressor operating range (ENERGY STAR)
- the air temperatures around the unit in which its heat pump runs; outside this range the heat pump stops
- Dimensions (ENERGY STAR)
- the unit's filed height, width, depth or tank diameter, in inches
- Input voltage and maximum current (ENERGY STAR)
- the circuit voltage the unit is certified on and the most current it draws
What these figures mean
How this compares
The closest models in the same class — same fuel, type and draw pattern.
Keep going
How every figure on this page is calculated
-
Find what replaces your water heater
Enter the model number off your old unit and see what is on file today, with the yearly cost difference.
-
Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
-
What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
-
What size heat pump water heater do I need?
Answered from what models in this size actually file.
-
Water heaters
Every model on file with the Department of Energy, by heater type.
-
All heat pump water heaters
Electric tanks that file a UEF of 2.0 or more — the registry has no separate heat pump type, so this site draws the line there.
-
Every RELIANCE WATER HEATERS model on file
What this brand files, by heater type.
UEF 3.35 · Grade B Price it on your ZIP
This site calculates the 970 kWh figure; the registry does not list it. The calculation uses the model's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw. For the FPTU-50 1**, the registry lists a UEF of 3.35. The medium draw pattern represents a typical mid-sized household with a busy morning. The figure applies only at that test draw. It describes the federal test, not any particular home. Energy use at other draw levels is not available for this model. The source is DOE CCD, retrieved 2026-09-19. For the steps behind the figure, see how the annual energy and cost figures are calculated.
The FPTU-50 1** has a rated volume of 46 gallons. Its first hour rating, the gallons of hot water available in the first hour from a full tank, is 66 gallons. These two values describe capacity, and the annual figure describes energy. The energy figure was calculated for a household whose hot-water use matches the medium pattern. A household that often needs more than 66 gallons in its busiest hour does not match that case. This page cannot say how energy use would change for that household, because that value is not available. The class gap given above, 2,561 kWh, also applies only at the medium pattern. To compare other electric tanks at the same pattern, use the same-class replacement search by model number.
This text does not state the yearly running cost. The cost depends on the reader's own utility electricity tariff, applied to the 970 kWh this model uses at the medium pattern. The page calculates that cost from the reader's ZIP. To see the cost for a specific address, enter the ZIP in the running cost calculator for your own ZIP. The installed price is separate. It appears in its own block with its source and date. That figure is a modeled installed-cost range, not a quote. Neither the running cost nor the installed price changes this model's registered UEF of 3.35.
DOE CCD · 2026-09-19