US Boiler Co Cast Iron Boiler 84% AFUE 70k Input, 59k Gross Out, 51k Net Out, 180 lbs, 1-1/4" NPT Heating Connections, 1/2" NPT Gas Connection, 4" Vent Size, Dims (WxDxH) 14" W x 32" D x 40"H, LP Boiler