Viessmann Vitodens 100-W B1HE-199 Gas Condensing Boiler, 199 MBH - 7722775

The Viessmann Vitodens 100-W B1HE-199 (7722775) is a heating-only, wall-mounted gas condensing boiler. With a 19.9-199 MBH input range and 95% AFUE, it hangs on the wall to keep the floor clear.

DOE heating capacity is 187 MBH and the Net AHRI water rating is 163 MBH. An Inox-Radial stainless steel heat exchanger handles condensing operation, and the 10:1 turndown keeps cycling low. Natural gas and LP are selected in software with no orifice change, and the unit is approved to 10,000 ft with no input de-rate. A boiler pump comes integrated in the cabinet.

Venting options are 80/125 mm concentric or 3 in. polypropylene/CPVC two-pipe, direct-vent sealed combustion. Heating supply/return connections are 1 in. NPT and gas is 3/4 in. NPT, with bottom-entry piping and front service access. Integrated Wi-Fi links to the ViCare app.

Highlights

• Input range 19.9-199 MBH with 10:1 turndown

• 95% AFUE; DOE capacity 187 MBH, Net AHRI 163 MBH

• Boiler pump integrated in the cabinet

• Fuel selected in software, no orifice swap between NG and LP

• Concentric 80/125 mm or 3 in. two-pipe direct venting

Specifications

In the box

• Boiler pump (integral)

• 30 psi pressure relief valve

• Installation fittings

• Outdoor temperature sensor

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.