AO Smith 81 Gallon - 180,000 BTU Commercial Gas Water Heater

BTR-180 Water Heater Specifications Gallon Capacity - 81 Gallons Recovery Capacity GPH 100¬ Rise - 175 Vent Size (inches) - 6 Input BTU/HR - 180,000 Height to Vent (inches) - 67 1/2 Diameter (inches) - 27 3/4 Three year Limited Tank Warranty Codes and Standards Design-certified by UL, according to ANSZ21.10.3 - CSA 4.3 standards governing storage-type water heaters Meets ASHRAE/IESNA 90.1-1999 Design-certified by Underwriters Laboratories Sanitation to NSF Standard 5 for 180¬F water Optional ASME tank construction available