ThermoMate JSLG44-26VE1(2")
0.92 UEF DOE CCD · 2026-09-19Grade C: where this UEF sits among the 397 models in its class, lowest (G) to highest (A). A position, not an official label. How the grade is set
A gas tankless unit, high draw pattern (a larger household, or one where showers and laundry overlap).
If you are checking the ThermoMate JSLG44-26VE1(2"), a gas tankless unit, this site computes 184 therms of natural gas a year. That figure uses the high draw pattern, the standard daily hot-water usage DOE tests against. It sits 2 therms above its class median of 182 therms, ranking 207th lowest energy use of 397.
Energy use per year
184 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 above the median of 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 207 of 397, lowest energy first.
Solid line: this model (184 therms). Dashed line: the class median.
Min 173 therms Median 182 therms Max 209 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
- 0.92 DOE CCD · 2026-09-19 Compared only with other models registered as a gas tankless unit at the high draw pattern.
- Draw Pattern the standard daily usage profile DOE tests the unit against
- High DOE CCD · 2026-09-19
- Maximum Gallons Per Minute how many gallons a minute it can heat while running continuously
- 4.1 gal/min DOE CCD · 2026-09-19
What it costs to install
$2,216–$3,239 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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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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How to size a tankless water heater by GPM
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 tankless water heaters
Gas-fired instantaneous units, sized by flow rate rather than tank gallons.
UEF 0.92 · Grade C Price it on your ZIP
The 184 therms figure does not appear in the registry itself. This site computed it from the model's UEF, the ratio of hot water delivered to energy used. The registry lists a UEF of 0.92 for this model. The second input is the DOE test's daily hot-water draw for the high draw pattern. The underlying data comes from DOE CCD, retrieved 2026-09-19. The comparison group is the 397 models registered as a gas tankless unit at the high draw pattern. Within that group, this model uses 2 therms a year more than the median. That places it in the second-highest quarter of its class for energy use. The figure holds only at the test's daily draw. Energy use at any other daily draw is not available on this page. The steps are set out in how the annual cost is calculated.
The high draw pattern stands for a larger household, or one where showers and laundry overlap. The registry lists a maximum flow rate in gallons per minute of 4.1 for this model. For a household of that kind, the 184 therms figure is the relevant test result. For a household with lighter daily use, this figure does not describe expected gas use. This page has no result for this model at other draw patterns. A reader who wants lower gas use at the same test draw should note the rank of 207th of 397. Other models in the same class sit lower on energy use. To compare them, find a same-class replacement by model number. To start from fuel, space and size instead, use the water heater selector.
Running cost is not stated in this text. It depends on your state's average residential natural gas price, which this site does not assume. The page therefore computes it from your ZIP, using the cost calculator on your own ZIP. The 184 therms yearly figure and the 2 therms gap to the class median are both energy amounts, not costs. What that gap means in money also depends on your rate, so it is not given here. The installed price range appears in its own block on this page, with its source and date. It is a modeled installed-cost range, not a quote from an installer. Neither the running cost nor the installed range changes the energy figure from DOE CCD, retrieved 2026-09-19.
DOE CCD · 2026-09-19