JOHN WOOD GPVL-40 2**
0.67 UEF DOE CCD · 2026-09-19Grade D: 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).
If you are verifying the JOHN WOOD GPVL-40 2**, it uses 165 therms of natural gas a year. This is at the medium draw pattern, the standard daily hot-water usage DOE tests against. That is 20 therms below the class median of 185 therms, and it ranks 20th lowest of 288 models.
Energy use per year
165 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 20 of 288, lowest energy first.
Solid line: this model (165 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
- 0.67 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
- 73 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 38 gal DOE CCD · 2026-09-19
What it costs to install
$1,818–$3,214 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 · 2026-09-24What 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 JOHN WOOD model on file
What this brand files, by heater type.
UEF 0.67 · Grade D Price it on your ZIP
The figure of 165 therms was computed by this site, not by the registry. It combines the registry's UEF with the DOE test's daily hot-water draw for the medium draw pattern. UEF, the ratio of hot water delivered to energy used, is 0.67 for this model. The registry lists a rated volume of 38 gallons for this tank. The figure holds only for that draw pattern and for natural gas. A household that draws hot water differently will use a different amount. The source is the DOE CCD, retrieved 2026-09-19. The method is set out in how the annual cost is calculated.
Against its class, this unit sits 20 therms below the median of 185 therms. Its rank of 20th lowest of 288 places it in the lowest quarter of its class for energy use. That comparison covers only gas tank models at the medium draw pattern. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 73 gallons. This suits a household whose busy-hour demand is close to the test's draw. It suits less well a household with larger peaks. The data here does not show how the unit performs above the test's draw. For a same-class comparison, use find a same-class replacement by model number.
Running cost depends on the state average residential gas price, which this text does not state. The figure of 165 therms is a quantity of gas, not a cost. Multiplying it by your own gas price gives the yearly cost at the medium draw pattern. Use the cost calculator on your own ZIP to apply your state's gas price. The 20 therms gap to the class median is also a quantity of gas, so its cost depends on the same price. The installed price range appears in its own block on the page, with its source and date. If the fuel, space or size does not fit, try the selector by fuel, space and size.
DOE CCD · 2026-09-19