B1HE-120 Vitodens 100-W (11-113 BTU Output) 95%EFF 3/4" GAS 1" HTG 80/125MM COAX OR 3'' PPS

Fits any home and budget with high performance at an attractive price. | Lasting performance with proven Viessmann titanium-stabilized stainless steel Inox-Radial heat exchanger. | Easy piping due to two sets of tappings, along with built-in pump and diverter. | Suitable for high altitudes up to 10,000 ft (3,000 m) with no power loss and automatic software vent length adjustment. | Reliable on-demand domestic hot water with Vitodens 100-W, B1KE combi models. | Low-emission combustion for environmentally-friendly operation. Less than 20 ppm NOx (at 3% O2). | Fully-modulating input with 10:1 turn-down ratio eliminates energy waste. | Extremely quiet operation; quieter than most refrigerators.