With Hot Oil Expansion Tank, 60 gal. Capacity (est.) Mounted on 25 ft. high Stand; having LIMPSFIELD Forced Air Burner, Type LCN0P21, s/n 00623 Mfg. 03/16/2010, 647 sq. ft. Heating Surface, 2.5 in. dia. Size of Tubes, 100 psi max w. p. @ 650 F, 7.4 M BTU Burner Size, AZCD Safety Controls, Skidded; with Hot Oil Expansion Tank; Exhaust Stock with Rain Cap.