Lennox WHHP080T45MD240S****
4.1 UEF DOE CCD · 2026-09-19Grade B: where this UEF sits among the 194 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
An electric tank, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking the Lennox WHHP080T45MD240S****, an electric tank, this site computes 1,210 kWh of electricity a year for it. That figure holds at the high draw pattern, the standard daily hot-water usage DOE tests against. It is 96 kWh below the 1,306 kWh median of its class, ranking 11th lowest energy use of 194.
Energy use per year
1,210 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 1,306 kWh for the 194 models registered in the same heater type and draw pattern; it ranks 11 of 194, lowest energy first.
Solid line: this model (1,210 kWh). Dashed line: the class median.
Min 1,002 kWh Median 1,306 kWh Max 5,334 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
- 4.1 DOE CCD · 2026-09-19 Compared only with other models registered as an electric tank at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High 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
- 88 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 74 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2025-12-01 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 UEF 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 Lennox model on file
What this brand files, by heater type.
UEF 4.1 · Grade B Price it on your ZIP
The registry does not print the 1,210 kWh figure. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used. For this model the UEF is 4.1. The second input is the daily hot-water draw that the DOE test sets for the high draw pattern. The registry values come from the DOE CCD, retrieved 2026-09-19. The result applies only at the federal test's daily draw. A household that draws more or less hot water will use a different amount. The page on how the annual cost is calculated explains each step. The rated volume is 74 gallons. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 88 gallons.
The high draw pattern describes a larger household, or one where showers and laundry overlap. The comparison class is the 194 models registered as an electric tank at that same draw pattern. Within that class, this model is in the lowest quarter for energy use, at the 11th position noted above. A plumber, seller or homeowner checking paperwork can match the unit against WHHP080T45MD240S**** and the 4.1 UEF listed here. The 88-gallon first hour rating is the figure to compare with a household's busiest hour of hot-water use. To see other models registered in the same class, use a same-class replacement search by model number.
The 1,210 kWh figure does not describe a smaller household with lower daily use. This page has no energy figure for this model at any other draw pattern, so that value is not available here. This text does not state the running cost. The cost depends on the reader's own utility electricity tariff. The cost calculator on your own ZIP applies that rate to the 1,210 kWh figure. This model also has no published installed price range. Its ratings lie outside the range the cost database's model was fitted on, and the range is not stretched past it. This data does not show whether the unit fits a given space or fuel supply. The selector by fuel, space and size filters on those points.
DOE CCD · 2026-09-19