60-gall/76MBH, NG, Condensing Fully modulating - 25 MBH to 76 MBH up to 97% thermal efficiency, 140 Galls 1st hour delivery , 316L Stainless Steel 1/2" Gas, 3/4" NPT inlet/outlet water 10-yr (on-line register), 7-yr standard 3--yr commercial Tank warranty | B2B Storefront