US Boiler Co Cast Iron Boiler 84% AFUE 105k Input, 88k Gross Out, 77k Net Out, 231 lbs, 1-1/4" NPT Heating Connections, 1/2" NPT Gas Connection, 5" Vent Size, Dims (WxDxH) 16" W x 32" D x 40"H, LP Boiler