waterheaterspecs

Gas tankless · high draw

Bosch T9800 SE xx

The Bosch T9800 SE xx line holds two certified rating sets of gas tankless water heaters, 11 model numbers sold under two brand names, listed by Bosch Thermotechnology. Gas input runs from 160,000 to 199,000 Btu/h, and max flow at a 67 °F rise runs from 4.6 to 5.4 gal/min. Bosch T9800 SE 199, the set with the most model numbers, rates 0.01 below 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 Bosch T9800 SE xx
Rating setGas input, Btu/hMax flow, gal/minShare of heat ceilingUEFUEF rankTherms/yr
Bosch T9800 SE 1605 model numbers160,0004.696%0.95 highlowest of 39, 19 tied178
Bosch T9800 SE 1996 model numbers199,0005.491%0.95 highlowest of 39, 19 tied178

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%.

Bosch T9800 SE xx: max flow against gas input

Bosch T9800 SE xxOther gas tankless sets

Max flow at a 67 °F rise, gal/min

Bosch T9800 SE xx: 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 1Bradford 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)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-150Bosch T9800 SE 199Bosch T9800 SE 160
Bosch T9800 SE xx: 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 1Bradford 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)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-150Bosch T9800 SE 199Bosch T9800 SE 160
Filled: the two sets of Bosch T9800 SE xx; 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 160,000 Btu/h to 199,000 Btu/h of gas input lifts max flow from 4.6 gal/min to 5.4 gal/min, about 0.21 gal/min for each extra 10,000 Btu/h.

Strongest placings, size by size

MeasureValueMedian of the groupPlacingCompared with
UEFBosch T9800 SE 1600.950.96lowest of 39, 19 tied39 high-draw gas tankless sets
Rated gas useBosch T9800 SE 160178 therms/yr176 therms/yrhighest of 39, 15 tied39 high-draw gas tankless sets
UEFBosch T9800 SE 1990.950.96lowest of 39, 19 tied39 high-draw gas tankless sets
Gas inputBosch T9800 SE 199199,000 Btu/h180,000 Btu/hhighest of 40, 13 tied40 gas tankless sets

Model numbers

The line covers 11 model numbers under two brand names, first certified 2023-04-07 and most recently 2023-07-06.

Model numberBrandRating setVentFuelMin flowCertified
T9800 SE 160BoschT9800 SE 160Direct Ventnatural gas or propane0.50 gal/min2023-04-07
T9800 SEO 160BoschT9800 SE 160Direct Ventnatural gas or propane0.50 gal/min2023-04-07
T9900 SE 160BoschT9800 SE 160Direct Ventnatural gas or propane0.50 gal/min2023-04-07
RTG-K-160N1Bradford WhiteT9800 SE 160Direct Ventnatural gas or propane0.50 gal/min2023-04-17
RTG-K-160N2Bradford WhiteT9800 SE 160Direct Ventnatural gas or propane0.50 gal/min2023-04-17
T9800 SE 199BoschT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-07-06
T9800 SEO 199BoschT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-07-06
T9900 SE 199BoschT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-07-06
RTG-K-199N1Bradford WhiteT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-06-07
RTG-K-199N2Bradford WhiteT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-06-07
RTGL 199N1Bradford WhiteT9800 SE 199Direct Ventnatural gas or propane0.50 gal/min2023-06-07

Nearest certified alternatives

Rating setMax flowUEFGas input
A. O. Smith ATI-340H 1compared with Bosch T9800 SE 199±0.0 gal/min±0.00−19,000 Btu/h
A. O. Smith ATHR-180M 1compared with Bosch T9800 SE 199−0.1 gal/min±0.00−19,000 Btu/h
Navien NPE-240A2compared with Bosch T9800 SE 199+0.2 gal/min±0.00same Btu/h
Midea JSG48-29PCH-LPcompared with Bosch T9800 SE 199−0.2 gal/min±0.00−19,000 Btu/h
A. O. Smith ATO-240H 1compared with Bosch T9800 SE 160+0.1 gal/min±0.00same Btu/h

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