6-GPM Gas Tankless Water Heaters

Gas tankless water heaters rated at about 6 gallons per minute under the DOE test's 77 °F temperature rise. At a milder rise the same units deliver more flow — roughly 8.4 GPM at 55 °F.

161 certified models in this category.

Model Uniform Energy Factor (UEF)FuelFirst-hour ratingMax flow rateRated storage volumeSmart / connected capable
A. O. Smith ACTH-199M-(N,P) 1 0.95Natural Gas, Propane—5.8 GPM—No
A. O. Smith ATHR-199M 1 0.95Natural Gas, Propane—5.9 GPM—No
A. O. Smith ATHR-199M 1 (ATHR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
A. O. Smith ATHR-199M 1 (GT15THR-199M 1) 0.95Natural Gas, Propane—5.9 GPM—No
A. O. Smith ATHR-199M 1 (GT15THR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
A. O. Smith ATM-199M-N 1 0.95Natural Gas—6 GPM—No
A. O. Smith ATM-199M-N 1 (ATM-199X3-N 1) 0.95Natural Gas—6 GPM—No
A. O. Smith ATM-199M-N 1 (GT15TM-199M-N) 0.95Natural Gas—6 GPM—No
A. O. Smith ATM-199M-N 1 (GT15TM-199X3-N) 0.95Natural Gas—6 GPM—No
A. O. Smith ATM-199M-P 1-1 0.95Propane—6 GPM—No
A. O. Smith ATM-199X3-P 1-1 0.95Propane—6 GPM—No
A. O. Smith GT15TM-199M-N 1 0.95Natural Gas—6 GPM—No
A. O. Smith GT15TM-199M-P 1-1 0.95Propane—6 GPM—No
A. O. Smith GT15TM-199X3-N 1 0.95Natural Gas—6 GPM—No
A. O. Smith GT15TM-199X3-P 1-1 0.95Propane—6 GPM—No
A. O. Smith T-H3-OS-N 1 (ACT-199O-N 1) 0.95Natural Gas—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ACT-199O-P 1-1) 0.95Propane—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540H 1-1) 0.95Propane—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540H 1) 0.95Natural Gas—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540HX3-N 1) 0.95Natural Gas—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540HX3-P 1-1) 0.95Propane—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540P-N 1) 0.95Natural Gas—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (ATO-540P-P 1-1) 0.95Propane—5.8 GPM—No
A. O. Smith T-H3-OS-N 1 (GT15-540-NO 1) 0.95Natural Gas—5.8 GPM—No
American ATHR-199M 1 (MTHR-199M 1) 0.95Natural Gas, Propane—5.9 GPM—No
American ATHR-199M 1 (MTHR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
American ATM-199M-N 1 (MTM-199M-N 1) 0.95Natural Gas—6 GPM—No
American ATM-199M-N 1 (MTM-199X3-N 1) 0.95Natural Gas—6 GPM—No
American MCTH-199M-(N,P) 1 0.95Natural Gas, Propane—5.8 GPM—No
American MTM-199M-P 1-1 0.95Propane—6 GPM—No
American MTM-199X3-P 1-1 0.95Propane—6 GPM—No
American T-H3-OS-N 1 (GT-540-NEH 1) 0.95Natural Gas—5.8 GPM—No
American T-H3-OS-N 1 (GT-540-PEH 1-1) 0.95Propane—5.8 GPM—No
American T-H3-OS-N 1 (GT-540P-NEH 1) 0.95Natural Gas—5.8 GPM—No
American T-H3-OS-N 1 (GT-540P-PEH 1-1) 0.95Propane—5.8 GPM—No
American T-H3-OS-N 1 (GT-540X3-NEH 1) 0.95Natural Gas—5.8 GPM—No
American T-H3-OS-N 1 (GT-540X3-PEH 1-1) 0.95Propane—5.8 GPM—No
American T-H3-OS-N 1 (MCT-199O-N 1) 0.95Natural Gas—5.8 GPM—No
American T-H3-OS-N 1 (MCT-199O-P 1-1) 0.95Propane—5.8 GPM—No
Bradford White RTGR199N1 0.96Natural Gas—5.8 GPM—No
Bradford White RTGR199X1 0.96Propane—5.8 GPM—No
Bradford White RTGS199N1 0.96Natural Gas—5.8 GPM—No
Bradford White RTGS199X1 0.96Propane—5.8 GPM—No
Friedrich FDTGH-S11I 0.96Natural Gas, Propane—5.8 GPM—No
Friedrich FDTGH-SR11I 0.96Natural Gas, Propane—5.8 GPM—No
Kepler JSG52-32PCH/199KNP 0.96Natural Gas—5.7 GPM—No
Kepler JSG52-32PCH/199KWP 0.96Natural Gas—5.7 GPM—No
Kings Peak KNG199ICW 0.96Natural Gas—5.7 GPM—No
Kiturami KGWH-190JFN 0.96Natural Gas—5.8 GPM—No
Kiturami KGWH-190JFP 0.96Propane—5.8 GPM—No
Kiturami KGWH-199JFRN 0.96Natural Gas—5.8 GPM—No
Kiturami KGWH-199JFRP 0.96Propane—5.8 GPM—No
Kiturami KTGWH-199CWP1 0.95Natural Gas, Propane—5.8 GPM—No
Kiturami KTGWH-199CWS1 0.95Natural Gas, Propane—5.8 GPM—No
Laars LT199NRX1 0.96Natural Gas—5.8 GPM—No
Laars LT199NXX1 0.96Natural Gas—5.8 GPM—No
Laars LT199PRX1 0.96Propane—5.8 GPM—No
Laars LT199PXX1 0.96Propane—5.8 GPM—No
Lochinvar ATHR-199M 1 (LTHR-199M 1) 0.95Natural Gas, Propane—5.9 GPM—No
Lochinvar ATHR-199M 1 (LTHR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
Lochinvar ATM-199M-N 1 (LTM-199M-N 1) 0.95Natural Gas—6 GPM—No
Lochinvar ATM-199M-N 1 (LTM-199X3-N 1) 0.95Natural Gas—6 GPM—No
Lochinvar LCTH-199M-(N,P) 1 0.95Natural Gas, Propane—5.8 GPM—No
Lochinvar LTM-199M-P 1-1 0.95Propane—6 GPM—No
Lochinvar LTM-199X3-P 1-1 0.95Propane—6 GPM—No
Lochinvar T-H3-OS-N 1 (LCT-199O-N 1) 0.95Natural Gas—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LCT-199O-P 1-1) 0.95Propane—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540H-N 1) 0.95Natural Gas—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540H-P 1-1) 0.95Propane—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540HX3-N 1) 0.95Natural Gas—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540HX3-P 1-1) 0.95Propane—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540P-N 1) 0.95Natural Gas—5.8 GPM—No
Lochinvar T-H3-OS-N 1 (LTO-540P-P 1-1) 0.95Propane—5.8 GPM—No
Midea JSG52-32PCH-LP 0.95Propane—5.7 GPM—No
Midea JSG52-32PCH-NG 0.95Natural Gas—5.7 GPM—No
Midea JSG52-32PCHP-LP 0.95Propane—5.7 GPM—No
Midea JSG52-32PCHP-NG 0.95Natural Gas—5.7 GPM—No
Midea MGWH199IXNN 0.95Natural Gas—5.7 GPM—No
Midea MGWH199IXNP 0.95Natural Gas—5.7 GPM—No
Midea MGWH199IXPN 0.95Propane—5.7 GPM—No
Midea MGWH199IXPP 0.95Propane—5.7 GPM—No
MRCOOL 0.95Natural Gas—5.7 GPM—No
MRCOOL MHWH199NCLU 0.95Propane—5.7 GPM—No
Navien NPE-240A2 0.95Natural Gas, Propane—5.6 GPM—No
Navien NPE-240S2 0.96Natural Gas, Propane—5.8 GPM—No
Noritz EZ111DV (GQ-C3259WX-FF US) 0.96Natural Gas, Propane—5.8 GPM—No
Noritz EZ111DV (GQ-C3260WX-FF US) 0.96Natural Gas, Propane—5.6 GPM—No
Noritz EZ111DV (GQ-C3261WX-FF US) 0.98Natural Gas, Propane—5.5 GPM—No
Noritz EZ111DV (GQ-C3261WX-FF-1 US) 0.98Natural Gas, Propane—5.5 GPM—No
Noritz EZ98DV (GQ-C2860WX-FF US) 0.96Natural Gas, Propane—5.6 GPM—No
Noritz NCC199CDV (GQ-C3259WZ-FF US) 0.96Natural Gas, Propane—5.8 GPM—No
Noritz NCC199CDV (GQ-C3260WZ-FF US) 0.96Natural Gas, Propane—5.6 GPM—No
Noritz NCC199CDV (GQ-C3261WZ-FF US) 0.98Natural Gas, Propane—5.5 GPM—No
Noritz NCC199CDV (GQ-C3261WZ-FF-1 US) 0.98Natural Gas, Propane—5.5 GPM—No
Noritz NRCR111DV (GQ-C3260WXQ-FF US) 0.96Natural Gas, Propane—5.6 GPM—No
Noritz NRCR111DV (GQ-C3261WXQ-FF US) 0.98Natural Gas, Propane—5.5 GPM—No
Noritz NRCR111DV(GQ-C3261WXQ-FF-1 US) 0.98Natural Gas, Propane—5.5 GPM—No
RELIANCE WATER HEATERS ATHR-199M 1 (RTHR-199M 1) 0.95Natural Gas, Propane—5.9 GPM—No
RELIANCE WATER HEATERS ATHR-199M 1 (RTHR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
RELIANCE WATER HEATERS ATM-199M-N 1 (RTM-199M-N 1) 0.95Natural Gas—6 GPM—No
RELIANCE WATER HEATERS ATM-199M-N 1 (RTM-199X3-N 1) 0.95Natural Gas—6 GPM—No
RELIANCE WATER HEATERS RTM-199M-P 1-1 0.95Propane—6 GPM—No
RELIANCE WATER HEATERS RTM-199X3-P 1-1 0.95Propane—6 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540-GEH 1) 0.95Natural Gas—5.8 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540-LEH 1-1) 0.95Propane—5.8 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540P-GEH 1) 0.95Natural Gas—5.8 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540P-LEH 1-1) 0.95Propane—5.8 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540X3-GEH 1) 0.95Natural Gas—5.8 GPM—No
RELIANCE WATER HEATERS T-H3-OS-N 1 (TS-540X3-LEH 1-1) 0.95Propane—5.8 GPM—No
Rheem ECOHS200IN 0.96Natural Gas—5.8 GPM—No
Rheem ECOHS200IP 0.96Propane—5.8 GPM—No
Rheem ECOHSR200IN 0.96Natural Gas—5.8 GPM—No
Rheem ECOHSR200IP 0.96Propane—5.8 GPM—No
Rheem RECTGH-S11IN 0.96Natural Gas—5.8 GPM—No
Rheem RECTGH-S11IP 0.96Propane—5.8 GPM—No
Rheem RECTGH-SR11IN 0.96Natural Gas—5.8 GPM—No
Rheem RECTGH-SR11IP 0.96Propane—5.8 GPM—No
Rheem RTGH-CS11I 0.96Natural Gas, Propane—5.8 GPM—No
Rheem RTGH-CSR11I 0.96Natural Gas, Propane—5.8 GPM—No
Rheem RTGH-S11I 0.96Natural Gas, Propane—5.8 GPM—No
Rheem RTGH-SR11I 0.96Natural Gas, Propane—5.8 GPM—No
Richmond RMTGHS11IN 0.96Natural Gas—5.8 GPM—No
Richmond RMTGHS11IP 0.96Propane—5.8 GPM—No
Richmond RMTGHSR11IN 0.96Natural Gas—5.8 GPM—No
Richmond RMTGHSR11IP 0.96Propane—5.8 GPM—No
Rinnai CX199I REU-NB3237FFC-US 0.98Natural Gas, Propane—5.8 GPM—No
Rinnai CXP199I REU-NBP3237FFC-US 0.98Natural Gas, Propane—5.8 GPM—No
Rinnai RX199I REU-NB3237FF-US 0.98Natural Gas, Propane—5.8 GPM—No
Rinnai RXP199I REU-NBP3237FF-US 0.98Natural Gas, Propane—5.8 GPM—No
Ruud RUTGH-CS11I 0.96Natural Gas, Propane—5.8 GPM—No
Ruud RUTGH-CSR11I 0.96Natural Gas, Propane—5.8 GPM—No
Ruud RUTGH-S11I 0.96Natural Gas, Propane—5.8 GPM—No
Ruud RUTGH-SR11I 0.96Natural Gas, Propane—5.8 GPM—No
State ATHR-199M 1 (STHR-199M 1) 0.95Natural Gas, Propane—5.9 GPM—No
State ATHR-199M 1 (STHR-199X3 1) 0.95Natural Gas, Propane—5.9 GPM—No
State ATM-199M-N 1 (STM-199M-N 1) 0.95Natural Gas—6 GPM—No
State ATM-199M-N 1 (STM-199X3-N 1) 0.95Natural Gas—6 GPM—No
State STCH-199M-(N,P) 1 0.95Natural Gas, Propane—5.8 GPM—No
State STM-199M-P 1-1 0.95Propane—6 GPM—No
State STM-199X3-P 1-1 0.95Propane—6 GPM—No
State T-H3-OS-N 1 (GTS-540-NEH 1) 0.95Natural Gas—5.8 GPM—No
State T-H3-OS-N 1 (GTS-540-PEH 1-1) 0.95Propane—5.8 GPM—No
State T-H3-OS-N 1 (GTS-540P-NEH 1) 0.95Natural Gas—5.8 GPM—No
State T-H3-OS-N 1 (GTS-540P-PEH 1-1) 0.95Propane—5.8 GPM—No
State T-H3-OS-N 1 (GTS-540X3-NEH 1) 0.95Natural Gas—5.8 GPM—No
State T-H3-OS-N 1 (GTS-540X3-PEH 1-1) 0.95Propane—5.8 GPM—No
State T-H3-OS-N 1 (SCT-199O-N 1) 0.95Natural Gas—5.8 GPM—No
State T-H3-OS-N 1 (SCT-199O-P 1-1) 0.95Propane—5.8 GPM—No
stream33 S33-95TWH199-LP/NG 0.95Natural Gas—5.7 GPM—No
stream33 S33-95TWH199P-LP/NG 0.95Natural Gas—5.7 GPM—No
Takagi T-H3-OS-N 1 0.95Natural Gas—5.8 GPM—No
Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) 0.95Propane—5.8 GPM—No
Takagi T-H3-OS-N 1 (TCT-199O-N 1) 0.95Natural Gas—5.8 GPM—No
Takagi T-H3-OS-N 1 (TCT-199O-P 1-1) 0.95Propane—5.8 GPM—No
Takagi T-H3-OS-N 1 (TK-540P-NEH 1) 0.95Natural Gas—5.8 GPM—No
Takagi T-H3-OS-N 1 (TK-540P-PEH 1-1) 0.95Propane—5.8 GPM—No
Takagi T-H3-OS-N 1 (TK-540X3-NEH 1) 0.95Natural Gas—5.8 GPM—No
Takagi T-H3-OS-N 1 (TK-540X3-PEH 1-1) 0.95Propane—5.8 GPM—No
Vesta VRP PLUS-199 0.96Natural Gas, Propane—6 GPM—No
Vesta VRS PLUS-199 0.96Natural Gas, Propane—5.9 GPM—No
Vesta VRS PLUS-199 (VTS-199) 0.96Natural Gas, Propane—5.9 GPM—No