Peerless Cast Iron Boiler 84.6% AFUE 70k Input, 60k Gross Out, 52k Net Out, 282 lbs, Supply: 1-1/2" NPT Return: 1-1/4" NPT Heating Connections, 1/2" NPT Gas Connection, 5" Vent Size, Dims (WxDxH) 12-1/2" W x 26-5/8" D x 31-3/8"H