Rinnai REP Series 27" 160K BTU Indoor Non-Condensing Propane Gas Tankl – US Fireplace Store
TCMT 16L Tankless Water Heater Natural Gas, 4.2 GPM On-Demand Instant Hot Water Heater, Indoor Whole House Gas Water Heater, Digital Display & Touch Screen, Thermostatic & Energy Saving - Walmart.com
RHEEM, Indoor, 24,000 W, Electric Tankless Water Heater - 53UJ87|RTEX-24 - Grainger
Rheem Performance Plus 9.5 GPM Natural Gas Indoor Tankless Water Heater ECO200DVLN3-1 - The Home Depot