New Yorker Cast Iron Boiler 82.1% AFUE 172k Input, 172K Gross Out, 107K Net Out, 555 lbs, 2" (x2 Supply, x1 Return) Heating Connections, 1/2" NPT Gas Connection, 6" Vent Size, Dims (WxDxH) 22-1/2" W x 28" D x 40-7/16"H