LOCHINVAR GPCT-40L 1**
0.9 UEF DOE CCD · 2026-09-19Grade A: where this UEF sits among the 414 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tank, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are verifying the LOCHINVAR GPCT-40L 1**, here is its federal test result. It uses 188 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 72 therms below the 260 therms median of the 414 gas tank models at the same draw pattern.
Energy use per year
188 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 260 therms for the 414 models registered in the same heater type and draw pattern; it ranks 1 of 414, lowest energy first.
Solid line: this model (188 therms). Dashed line: the class median.
Min 188 therms Median 260 therms Max 277 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
- 0.9 DOE CCD · 2026-09-19 Compared only with other models registered as a gas 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
- 86 gal DOE CCD · 2026-09-19
- Rated Storage Volume the tank size in gallons
- 38 gal DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2025-10-21 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
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.
- 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
- Vent type and size (ENERGY STAR)
- how a gas unit is vented, the vent's diameter and the height of its vent connector
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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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 LOCHINVAR model on file
What this brand files, by heater type.
UEF 0.9 · Grade A Price it on your ZIP
The registry does not print the 188 therms figure. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw for the high draw pattern. This model's UEF is 0.9. The source is the DOE CCD, retrieved 2026-09-19. This site compared the unit with the 414 models registered as a gas tank at the high draw pattern. It ranks 1st for lowest energy use among them, which places it in the lowest quarter of its class for energy use. The figure holds only at the test's daily draw. This page does not have the model's gas use at a different daily draw.
The high draw pattern stands for a larger household, or one where showers and laundry overlap. For that use, the registry lists a first hour rating, the gallons of hot water available in the first hour from a full tank, of 86 gallons. The tank's rated volume is 38 gallons. A home with lighter daily use does not match the condition behind the annual figure. This page has no energy figure for this model at a lower draw pattern, so that comparison is unknown. To compare other models, use the water heater selector by fuel, space and size. To match this unit within its class, find a same-class replacement by model number.
The running cost does not appear in this text because it depends on your state's average residential gas price. Instead, the page computes it from your ZIP, using the yearly gas figure at the high draw pattern. You can enter a ZIP in the water heater cost calculator for your ZIP. The steps behind that result are set out in how the annual running cost is calculated. This site does not publish an installed price range for this model. Its ratings lie outside the range that the cost database's model was fitted on. This site does not stretch the range past that limit, so this page has no installed price for the unit.
DOE CCD · 2026-09-19