Viessmann Vitola 200 High-quality oil/gas-fired low temperature heating boiler, input range 83 to 300 MBH (24 to 88kW) Specifically designed for modulating boiler water temperatures without low limit Low-emission combustion Chassis burner and optimized combustion chamber geometry Switches off when no heat is required Reliable heat transfer due to wide water jackets and large water content Highly effective boiler insulation for negligible stand-by losses AFUE rating gas up to 85% Viesmann Vitocell Domestic hot water tanks of steel construction with Ceraprotect two-coat enamel finish or of corrosion-resistant stainless steel construction Storage capacity: 42 to 120 USG (160 to 450 liters) Tanks and heat exchangers are fabricated from SA240-316 high performance stainless steel Volume domestic hot water heating - fast and efficient