Kepler JSG52-32PCH/199KNP
0.95 UEF DOE CCD · 2026-09-19Grade B: 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 Kepler JSG52-32PCH/199KNP, it uses 178 therms of natural gas a year at the high draw pattern, the standard daily hot-water usage DOE tests against. That is 4 therms below the class median of 182 therms, and it ranks 45th lowest of 397 models.
Energy use per year
178 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 182 therms for the 397 models registered in the same heater type and draw pattern; it ranks 45 of 397, lowest energy first.
Solid line: this model (178 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
- 0.95 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
- 5.7 gal/min DOE CCD · 2026-09-19
- On the market since (ENERGY STAR) the date the manufacturer told ENERGY STAR the model went on sale
- 2024-05-30 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
$2,358–$3,405 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 · 2026-09-24Does 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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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.
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Every Kepler model on file
What this brand files, by heater type.
UEF 0.95 · Grade B Price it on your ZIP
The figure of 178 therms of natural gas is not a measurement taken in your home. This site computed it, not the registry. The inputs are the registry's UEF, the ratio of hot water delivered to energy used. For this unit it is 0.95. The second input is the DOE test's daily hot-water draw for the high draw pattern. The source is the 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 the unit uses 4 therms less than the median of 182 therms. Its rank of 45th lowest puts it in the lowest quarter of its class for energy use. The spread of the class is not in the data, so how large that gap is against the rest of the group is not available.
The registry lists a maximum flow rate in gallons per minute of 5.7 for this unit. How many fixtures that flow serves depends on incoming water temperature and the fixtures in use, and neither is in the data. The energy figure applies to a household that matches the high draw pattern, meaning a larger household, or one where showers and laundry overlap. It does not describe a household with lighter use. Annual energy for other draw patterns is not calculated on this page for this model. If you want to compare other options by fuel, space and size, the water heater selector covers those filters. The class median of 182 therms is the reference point for any comparison made here.
The running cost is not stated in the text. It depends on your state's average residential gas price, and this page does not assume one. The cost follows from 178 therms and that price. Enter your ZIP in the cost calculator to see the result for your own rate. The page how the annual cost is calculated explains the inputs and their dates. The unit sits 4 therms below the class median of 182 therms, so at any single gas price the difference in running cost from a median model comes only from that energy gap. The modeled installed-cost range appears in its own block on this page, with its source and date. It is a modeled range, not a quote.
DOE CCD · 2026-09-19