Richmond RHE40SP
0.75 UEF DOE CCD · 2026-09-19Grade A: where this UEF sits among the 288 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tank, medium draw pattern (a typical three- or four-person household, about 55 gallons on a busy morning).
Checking this unit's rating? Under the medium draw pattern, the standard daily hot-water usage DOE tests against, the Richmond RHE40SP gas tank uses 148 therms of natural gas a year. That is 37 therms below the 185 therms median of the 288 gas tank models at this draw pattern, and ranks 1st for lowest energy use.
Energy use per year
148 therms 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 natural gas rate where you live.
That is below the median of 185 therms for the 288 models registered in the same heater type and draw pattern; it ranks 1 of 288, lowest energy first.
Solid line: this model (148 therms). Dashed line: the class median.
Min 148 therms Median 185 therms Max 194 therms
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
- 0.75 DOE CCD · 2026-09-19 Compared only with other models registered as a gas 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
- 68 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 37 gal DOE CCD · 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 · 2026-09-24What 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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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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Is a 40-gallon water heater enough?
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 gas tank water heaters
Gas-fired storage tanks, every size and draw pattern on file.
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Every Richmond model on file
What this brand files, by heater type.
UEF 0.75 · Grade A Price it on your ZIP
The 148 therms figure does not appear in the registry. This site calculates it from two DOE inputs. The first is the model's UEF, the ratio of hot water delivered to energy used. The second is the daily hot-water draw that the federal test sets for the medium draw pattern. The registry lists this UEF as 0.75, taken from DOE's certification database (CCD) on 2026-09-19. The result applies only at that test draw. The registry gives no energy figure for heavier or lighter use. At that draw, the 37 therms gap to the class median is a difference in rated energy only. The steps are set out in how this site calculates annual energy and cost.
The medium draw pattern is DOE's test model of a typical household's daily hot-water use. This unit's first hour rating, the gallons of hot water available in the first hour from a full tank, is 68 gallons. Its rated volume is 37 gallons. A household whose busiest hour stays within 68 gallons matches the conditions behind the 148 therms figure. A household that needs more than that in its busiest hour falls outside what the rating covers. The data here does not say how the unit performs in that case. To compare other units by fuel, space and size, use the water heater selector. To find a unit in the same class as model RHE40SP, use the same-class replacement lookup by model number.
This text does not give a running cost. The cost depends on the average residential natural gas price in the reader's state. The page calculates it from the reader's ZIP code and the 148 therms figure. The cost calculator for your own ZIP applies that rate. No installed price range is published for the Richmond RHE40SP. This model's ratings lie outside the range that the cost database's model was fitted on. The site does not extend that range to cover it, so no installed price is shown. The class comparison above is based on energy use, not cost. The reader's gas price does not change the model's 1st rank among 288 models.
DOE CCD · 2026-09-19