waterheaterspecs

Gas tankless · high draw

Rheem ECOHSxxIN

The Rheem ECOHSxxIN line holds three certified rating sets of gas tankless water heaters, 71 model numbers sold under eight brand names, listed by Rheem Sales Company, Kiturami and Navien. Gas input runs from 157,000 to 199,000 Btu/h, and max flow at a 67 °F rise runs from 4.6 to 5.8 gal/min. Rheem ECOHS200IN lists 5.8 gal/min, the fifth highest of the 40 gas tankless sets (shared by three sets). Rheem ECOHS200IN 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 Rheem ECOHSxxIN
Rating setGas input, Btu/hMax flow, gal/minShare of heat ceilingUEFUEF rankTherms/yr
Rheem ECOHS160IN18 model numbers157,0004.698%0.96 higheighth highest of 39, 13 tied176
Rheem ECOHS180IN18 model numbers180,0005.297%0.96 higheighth highest of 39, 13 tied176
Rheem ECOHS200IN35 model numbers199,0005.898%0.96 higheighth highest of 39, 13 tied176

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%.

Rheem ECOHSxxIN: max flow against gas input

Rheem ECOHSxxINOther gas tankless sets

Max flow at a 67 °F rise, gal/min

Rheem ECOHSxxIN: 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 RTGR150N1Kepler JSG48-29PCH/180KKepler JSG52-32PCH/199KNPMidea 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)Rinnai (CX160I) REU-NB2530FFC-USRinnai (CX199I) REU-NB3237FFC-USRinnai (RX130I) REU-NB2024FF-USVesta VRP-PLUS-150Vesta VRS PLUS-199Vesta VTP-150Vesta VTP-199Vesta VTS-150Rheem ECOHS200INRheem ECOHS160INRheem ECOHS180IN
Rheem ECOHSxxIN: 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 RTGR150N1Kepler JSG48-29PCH/180KKepler JSG52-32PCH/199KNPMidea 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)Rinnai (CX160I) REU-NB2530FFC-USRinnai (CX199I) REU-NB3237FFC-USRinnai (RX130I) REU-NB2024FF-USVesta VRP-PLUS-150Vesta VRS PLUS-199Vesta VTP-150Vesta VTP-199Vesta VTS-150Rheem ECOHS200INRheem ECOHS160INRheem ECOHS180IN
Filled: the three sets of Rheem ECOHSxxIN; open circles: the other 37 gas tankless sets. Dashed line: the flow that the full gas input could heat through a 67 °F rise.

Across the sizes

Moving from 157,000 Btu/h to 199,000 Btu/h of gas input lifts max flow from 4.6 gal/min to 5.8 gal/min, about 0.29 gal/min for each extra 10,000 Btu/h.

Strongest placings, size by size

MeasureValueMedian of the groupPlacingCompared with
UEFRheem ECOHS160IN0.960.96eighth highest of 39, 13 tied39 high-draw gas tankless sets
Max flow at a 67 °F riseRheem ECOHS160IN4.6 gal/min5.2 gal/mineighth lowest of 40, four tied40 gas tankless sets
UEFRheem ECOHS180IN0.960.96eighth highest of 39, 13 tied39 high-draw gas tankless sets
Rated gas useRheem ECOHS180IN176 therms/yr176 therms/yr13th lowest of 39, 11 tied39 high-draw gas tankless sets
Gas inputRheem ECOHS200IN199,000 Btu/h180,000 Btu/hhighest of 40, 13 tied40 gas tankless sets
Max flow at a 67 °F riseRheem ECOHS200IN5.8 gal/min5.2 gal/minfifth highest of 40, three tied40 gas tankless sets

Model numbers

The line covers 71 model numbers under eight brand names, first certified 2023-02-23 and most recently 2025-03-28. An asterisk stands for a variant character in the model number.

Model numberBrandRating setVentFuelMin flowCertified
FDTGH-S84IFriedrichECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
FDTGH-SR84IFriedrichECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
ECOHS160INRheemECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHS160IPRheemECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
ECOHSR160INRheemECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHSR160IPRheemECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-S84INRheemECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-S84IPRheemECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-SR84INRheemECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-SR84IPRheemECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
RTGH-S84IRheemECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
RTGH-SR84IRheemECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
RMTGHS84INRichmondECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHS84IPRichmondECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
RMTGHSR84INRichmondECOHS160INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHSR84IPRichmondECOHS160INDirect Ventpropane0.40 gal/min2024-04-26
RUTGH-S84IRuudECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RUTGH-SR84IRuudECOHS160INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
FDTGH-S10IFriedrichECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
FDTGH-SR10IFriedrichECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
ECOHS180INRheemECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHS180IPRheemECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
ECOHSR180INRheemECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHSR180IPRheemECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-S10INRheemECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-S10IPRheemECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-SR10INRheemECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-SR10IPRheemECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
RTGH-S10IRheemECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RTGH-SR10IRheemECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RMTGHS10INRichmondECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHS10IPRichmondECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
RMTGHSR10INRichmondECOHS180INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHSR10IPRichmondECOHS180INDirect Ventpropane0.40 gal/min2024-04-26
RUTGH-S10IRuudECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RUTGH-SR10IRuudECOHS180INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RTGR199N1**Bradford WhiteECOHS200INPower Direct Ventnatural gas0.50 gal/min2025-01-21
RTGR199X1**Bradford WhiteECOHS200INPower Direct Ventpropane0.50 gal/min2025-01-21
RTGS199N1**Bradford WhiteECOHS200INPower Direct Ventnatural gas0.50 gal/min2025-01-21
RTGS199X1**Bradford WhiteECOHS200INPower Direct Ventpropane0.50 gal/min2025-01-21
FDTGH-S11IFriedrichECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
FDTGH-SR11IFriedrichECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-07-22
KGWH-190JFNKituramiECOHS200INPower Direct Ventnatural gas0.50 gal/min2024-10-29
KGWH-190JFPKituramiECOHS200INPower Direct Ventpropane0.50 gal/min2024-10-28
KGWH-199JFRNKituramiECOHS200INPower Direct Ventnatural gas0.50 gal/min2024-10-29
KGWH-199JFRPKituramiECOHS200INPower Direct Ventpropane0.50 gal/min2024-10-28
LT199NRX1**LaarsECOHS200INPower Direct Ventnatural gas0.50 gal/min2025-02-20
LT199NXX1**LaarsECOHS200INPower Direct Ventnatural gas0.50 gal/min2025-02-20
LT199PRX1**LaarsECOHS200INPower Direct Ventpropane0.50 gal/min2025-02-20
LT199PXX1**LaarsECOHS200INPower Direct Ventpropane0.50 gal/min2025-02-20
NPE-240S2NavienECOHS200INPower Direct Ventnatural gas or propane1.00 gal/min2023-02-23
ECOHS200INRheemECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHS200IPRheemECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
ECOHSR200INRheemECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
ECOHSR200IPRheemECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-S11INRheemECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-S11IPRheemECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
RECTGH-SR11INRheemECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
RECTGH-SR11IPRheemECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
RTGH-CS11IRheemECOHS200INDirect Ventnatural gas or propane0.40 gal/min2025-03-28
RTGH-CSR11IRheemECOHS200INDirect Ventnatural gas or propane0.40 gal/min2025-03-28
RTGH-S11IRheemECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RTGH-SR11IRheemECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RMTGHS11INRichmondECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHS11IPRichmondECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
RMTGHSR11INRichmondECOHS200INDirect Ventnatural gas0.40 gal/min2024-04-26
RMTGHSR11IPRichmondECOHS200INDirect Ventpropane0.40 gal/min2024-04-26
RUTGH-CS11IRuudECOHS200INDirect Ventnatural gas or propane0.40 gal/min2025-03-28
RUTGH-CSR11IRuudECOHS200INDirect Ventnatural gas or propane0.40 gal/min2025-03-28
RUTGH-S11IRuudECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-04-26
RUTGH-SR11IRuudECOHS200INDirect Ventnatural gas or propane0.40 gal/min2024-04-26

Nearest certified alternatives

Rating setMax flowUEFGas input
Kepler JSG52-32PCH/199KNPcompared with Rheem ECOHS200IN−0.1 gal/min±0.00same Btu/h
Vesta VRS PLUS-199compared with Rheem ECOHS200IN+0.1 gal/min±0.00same Btu/h
Noritz EZ111DV (GQ-C3260WX-FF US)compared with Rheem ECOHS200IN−0.2 gal/min±0.00same Btu/h
Noritz EZ98DV (GQ-C2860WX-FF US)compared with Rheem ECOHS200IN−0.2 gal/min±0.00−19,000 Btu/h
Vesta VTS-150compared with Rheem ECOHS160IN±0.0 gal/min±0.00−7,000 Btu/h

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