The MiniMax® 100 is a compact, lightweight and efficient gas fired high performance aboveground pool and spa heater that can be connected to schedule 40 CPVC or ABS pipe and have built-in tops. Reliable direct-spark ignition (DSI) system is available in propane or natural gas versions. Millivolt standing pilot versions in propane or natural gas Fuel gas input of 100,000 btu/hr with thermal efficiency in excess of 82% Quiet and dependable operation from packaged burner system Bronze Headers Quick Flange allow 1 1/2 FIP connect The controls have been designed for very easy access and are user friendly Low profile and lightweight. Perfect for one-man installation Installs to 3,500 ft. altitude MINI MAX 100 POOL HEATER MILLIVOLT NATURAL GAS 460352 Regular price: $1,150.00 Sale price: $745.00 MINI MAX 100 POOL HEATER MILLIVOLT PROPANE GAS 460353 Regular price: $1,150.00 Sale price: $745.00