Water Heater; LP Gas; With Pilot And Direct Spark Ignition Options; On-Demand/ Tankless; 60,000 BTU; 12-1/2 Inch Height x 12-1/2 Inch Width x 20 Inch Depth; 36 Pounds When Installed; Non Portable; With Built-In Freeze Protection Mechanism; 2-Stage Modulating Combustion System Monitors (MCS); On Demand Control Center Or On-Off Switch/ Wall Vent/ Water Heater Access Door Sold Separately