Lochinvar Energyrite Swimming Pool Heater - 400000 BTU - Natural Gas
Click below to buy on Amazon: http://www.amazon.com/gp/product/B002MEO23S?tag=sukses2015-20
Digital controls allow easy access to temperature settings
Rust-free surface and built to commercial grade standards but only for residential use
Low NOx emissions
Multiple venting options
3 year limited warranty on Heat Exchanger and 2 year limited on Parts