Features: • All models comply with ASHRAE/IES 90.1-2004. • Glass-lined tank — assures years of rust-free clean hot water. • Fully automatic controls with safety shutoff — accurate, dependable control system requires no electric connections. Fixed automatic gas shutoff device for added safety. Not recommended for 180°f sanitizing. • Heavy gauge steel jacket — finished with baked enamel over bonderized undercoat. Foam insulation — saves fuel, and helps reduce standby heat loss. • Certification — bt-65 units are design certified by CSA (Canadian gas association for units built in Canada). Certified for installation on combustible flooring. • Low nox — all models meet or exceed current texas and california SCAQMD air quality standards. • Easy to install — completely factory assembled. Only gas, water, and vent connections need to be made. All connections are located in front and on top of heaters for ease of installation and service. • Draft diverter — low-profile diverter furnished as standard equipment. • Maximum working pressure — 150 psi. • Maximum gas inlet pressure — 14" w.C. • Handhole cleanout — on models BT-80 & bt-100. Allows easy tank cleaning. Other features: Built-in gas filter and integral dirt leg (propane only). Anodic protection. Equipped with a gas pressure regulator. An integral automatic gas shutoff system prevents excessive water temperature. Factory installed A.G.A./ASME-rated temperature and pressure relief valve. Specifications: • BtuH: 75,100 • Diameter: 26-1/2" • GPH Rec. 100°F Rise: 73 • Gallons: 74.00 • Gas Type: NG • Height with Draft Hood: 61-1/8" • Vent Size: 4" • Wt. Lbs.: 185.0