Rheem RTGH Series 8.4 GPM Natural Gas Tankless Water Heater Indoor | 157,000 BTUs Super High Efficiency On Demand, Continuous Hot Water | Condensing Ultra-Low Nox

Rheem IKONIC 11.2 GPM Natural Gas Tankless Water Heater Indoor | 199,900 BTUs Super High Efficiency On Demand, Instant Hot Water | Condensing Ultra-Low Nox | Wifi Enabled | Recirculation

★ 10.0/10

Noritz GQ-C3261WX-FF US NG EZ Series Pro 11.1 GPM 199,900 BTU 120 Volt Residential Indoor/Outdoor Natural Gas Tankless Water Heater with Bluetooth Connectivity

★ 10.0/10

TAKAGI TK-540P-NIH 10 GPM Residential Natural Gas Tankless Water Heater with 199000 Maximum BTU Input - N/A

★ 9.0/10

MIZUDO Natural Gas Tankless Water Heater, 199,000 BTU, Indoor | 10.3 GPM High Flow, Whole-Home Endless Hot Water, 5-7 Outlets, WiFi & App Control, CSA Certified, 95-149°F, Anti-Freeze

★ 8.8/10

Rheem RTGH Series 9.5 GPM Liquid Propane Tankless Water Heater Indoor | 199,900 BTUs Super High Efficiency On Demand, Continuous Hot Water | Condensing Ultra-Low Nox

★ 8.2/10

A. O. Smith Water Heater | 10 GPM, 199K BTU | NG Indoor | ATI-540P-N

★ 8.0/10