waterheaterspecs

Gas tankless · high draw

Kepler gas tankless heaters

Kepler model numbers form two certified rating sets of gas tankless water heaters across several model series, 4 model numbers sold under two brand names, listed by Azure Canada and Salt Lake Iron & Steel. Gas input runs from 180,000 to 199,000 Btu/h, and max flow at a 67 °F rise runs from 5.2 to 5.7 gal/min. Kepler JSG52-32PCH/199KNP sits exactly on the median UEF of the 39 high-draw gas tankless sets, 0.96.

Certified as of October 27, 2026 · EPA ENERGY STAR data, public domain · Compare in the Heater finder

Size by size

Certified values of Kepler gas tankless heaters
Rating setGas input, Btu/hMax flow, gal/minShare of heat ceilingUEFUEF rankTherms/yr
Kepler JSG48-29PCH/180K1 model number180,0005.297%0.96 higheighth highest of 39, 13 tied175
Kepler JSG52-32PCH/199KNP3 model numbers199,0005.796%0.96 higheighth highest of 39, 13 tied175

Share of heat ceiling: listed flow ÷ the flow the gas input could heat through 67 °F at 100% efficiency; test tolerances allow a little over 100%.

Kepler gas tankless heaters: max flow against gas input

Kepler gas tankless heatersOther gas tankless sets

Max flow at a 67 °F rise, gal/min

Kepler gas tankless heaters: max flow against gas input3.54.04.55.05.56.06.5120130140150160170180190200Gas input, thousand Btu/hA. O. Smith ACT-199O-N 1A. O. Smith ATHR-160M 1A. O. Smith ATHR-180M 1A. O. Smith ATHR-199M 1A. O. Smith ATI-340H 1A. O. Smith ATM-140M-N 1A. O. Smith ATM-199M-N 1A. O. Smith ATO-240H 1Bosch T9800 SE 160Bosch T9800 SE 199Bradford White RTGR150N1Midea JSG40-24PCH-LPMidea JSG48-29PCH-LPMidea JSG52-32PCH-LPMidea MGWH150IXNNNavien NPE-180A2Navien NPE-180S2Navien NPE-210A2Navien NPE-210S2Navien NPE-240A2Noritz EZ111DV (GQ-C3260WX-FF US)Noritz EZ111DV (GQ-C3261WX-FF US)Noritz EZ71DV (GQ-C2661WX-FF US)Noritz EZ98DV (GQ-C2860WX-FF US)Noritz EZ98DV (GQ-C2861WX-FF US)Noritz NRCR92DV (GQ-C2660WXQ-FF US)Noritz NRCR92DV (GQ-C2661WXQ-FF US)Rheem ECOHS160INRheem ECOHS180INRheem ECOHS200INRinnai (CX160I) REU-NB2530FFC-USRinnai (CX199I) REU-NB3237FFC-USRinnai (RX130I) REU-NB2024FF-USVesta VRP-PLUS-150Vesta VRS PLUS-199Vesta VTP-150Vesta VTP-199Vesta VTS-150Kepler JSG52-32PCH/199KNPKepler JSG48-29PCH/180K
Kepler gas tankless heaters: max flow against gas input3.54.04.55.05.56.06.5120140160180200Gas input, thousand Btu/hA. O. Smith ACT-199O-N 1A. O. Smith ATHR-160M 1A. O. Smith ATHR-180M 1A. O. Smith ATHR-199M 1A. O. Smith ATI-340H 1A. O. Smith ATM-140M-N 1A. O. Smith ATM-199M-N 1A. O. Smith ATO-240H 1Bosch T9800 SE 160Bosch T9800 SE 199Bradford White RTGR150N1Midea JSG40-24PCH-LPMidea JSG48-29PCH-LPMidea JSG52-32PCH-LPMidea MGWH150IXNNNavien NPE-180A2Navien NPE-180S2Navien NPE-210A2Navien NPE-210S2Navien NPE-240A2Noritz EZ111DV (GQ-C3260WX-FF US)Noritz EZ111DV (GQ-C3261WX-FF US)Noritz EZ71DV (GQ-C2661WX-FF US)Noritz EZ98DV (GQ-C2860WX-FF US)Noritz EZ98DV (GQ-C2861WX-FF US)Noritz NRCR92DV (GQ-C2660WXQ-FF US)Noritz NRCR92DV (GQ-C2661WXQ-FF US)Rheem ECOHS160INRheem ECOHS180INRheem ECOHS200INRinnai (CX160I) REU-NB2530FFC-USRinnai (CX199I) REU-NB3237FFC-USRinnai (RX130I) REU-NB2024FF-USVesta VRP-PLUS-150Vesta VRS PLUS-199Vesta VTP-150Vesta VTP-199Vesta VTS-150Kepler JSG52-32PCH/199KNPKepler JSG48-29PCH/180K
Filled: the two sets of Kepler gas tankless heaters; open circles: the other 38 gas tankless sets. Dashed line: the flow that the full gas input could heat through a 67 °F rise.

Across the sizes

Moving from 180,000 Btu/h to 199,000 Btu/h of gas input lifts max flow from 5.2 gal/min to 5.7 gal/min, about 0.26 gal/min for each extra 10,000 Btu/h.

Strongest placings, size by size

MeasureValueMedian of the groupPlacingCompared with
Rated gas useKepler JSG48-29PCH/180K175 therms/yr176 therms/yrseventh lowest of 39, six tied39 high-draw gas tankless sets
UEFKepler JSG48-29PCH/180K0.960.96eighth highest of 39, 13 tied39 high-draw gas tankless sets
Gas inputKepler JSG52-32PCH/199KNP199,000 Btu/h180,000 Btu/hhighest of 40, 13 tied40 gas tankless sets
Rated gas useKepler JSG52-32PCH/199KNP175 therms/yr176 therms/yrseventh lowest of 39, six tied39 high-draw gas tankless sets

Model numbers

The line covers 4 model numbers under two brand names, all certified 2024-03-18.

Model numberBrandRating setVentFuelMin flowCertified
JSG48-29PCH/180KKeplerJSG48-29PCH/180KPower Direct Ventnatural gas0.60 gal/min2024-03-18
JSG52-32PCH/199KNPKeplerJSG52-32PCH/199KNPPower Direct Ventnatural gas0.60 gal/min2024-03-18
JSG52-32PCH/199KWPKeplerJSG52-32PCH/199KNPPower Direct Ventnatural gas0.60 gal/min2024-03-18
KNG199ICWKings PeakJSG52-32PCH/199KNPPower Direct Ventnatural gas0.60 gal/min2024-03-18

Nearest certified alternatives

Rating setMax flowUEFGas input
Rheem ECOHS200INcompared with Kepler JSG52-32PCH/199KNP+0.1 gal/min±0.00same Btu/h
Noritz EZ111DV (GQ-C3260WX-FF US)compared with Kepler JSG52-32PCH/199KNP−0.1 gal/min±0.00same Btu/h
Noritz EZ98DV (GQ-C2860WX-FF US)compared with Kepler JSG52-32PCH/199KNP−0.1 gal/min±0.00−19,000 Btu/h
Vesta VRS PLUS-199compared with Kepler JSG52-32PCH/199KNP+0.2 gal/min±0.00same Btu/h
Rheem ECOHS180INcompared with Kepler JSG48-29PCH/180K±0.0 gal/min±0.00same Btu/h

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