ARISTON ARIHPWH-40-T
3.55 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).
For ARISTON ARIHPWH-40-T, this site computes 915 kWh of electricity a year at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 2,616 kWh below the class median of 3,531 kWh across 426 electric tank models registered at that pattern.
Energy use per year
915 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 60 of 426, lowest energy first.
Solid line: this model (915 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
- 3.55 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
- 65 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 37 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2025-09-01 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)
- Yes (CTA-2045-B) 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-513A, GWP 630 ENERGY STAR · 2026-09-19
What it costs to install
Not published: Installed cost range
This model's rated tank size lies outside the range NLR REMDB's cost model was fitted on, and the range is not stretched past it.
The annual energy figure on this page does not depend on this range and is unaffected.
Safety 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
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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.
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Find a water heater that fits
Three questions — fuel, hot water need, install space — narrow every model on file to the ones that fit.
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What a water heater costs to run
Prices a unit's efficiency against your own utility's filed tariff for your ZIP code.
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What size heat pump water heater do I need?
Answered from what models in this size actually file.
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Water heaters
Every model on file with the Department of Energy, by heater type.
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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.
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Every ARISTON model on file
What this brand files, by heater type.
UEF 3.55 · Grade B Price it on your ZIP
The figure of 915 kWh is not a meter reading. This site computed it from the registry's UEF of 3.55 and the DOE test's daily hot-water draw for the medium draw pattern. UEF, the ratio of hot water delivered to energy used, is the input that moves the result. The unit ranks 60th lowest in energy use of 426, which places it in the lowest quarter of its class. Its distance from the class median of 3,531 kWh is 2,616 kWh. The source is DOE CCD, retrieved 2026-09-19. The figure holds only for the medium draw pattern. Values for other draw patterns are not available on this page.
The medium draw pattern describes a typical three- or four-person household on a busy morning. The figure suits a reader whose use resembles that pattern. This model has a first hour rating, the gallons of hot water available in the first hour from a full tank, of 65 gallons. Its rated volume is 37 gallons. A household that draws much more or much less than the test's daily draw should expect real energy use to differ from 915 kWh. The registry does not say by how much. Whether the first hour rating covers a given household's peak hour is a separate check that this page does not make. To compare, use the water heater selector by fuel, space and size or find a same-class replacement by model number.
The running cost depends on the electricity tariff you pay, so this text states no cost figure. The cost calculator on your own ZIP applies your rate to 915 kWh. The steps behind that calculation are explained in how the annual cost is calculated. An installed price range is not published for this model. Its ratings of 65 gallons first hour rating and 37 gallons rated volume lie outside the range the cost database's model was fitted on. The range is not stretched past it. The class comparison rests on 426 models at the medium draw pattern only.
DOE CCD · 2026-09-19