Viessmann Vitodens 100-W B1HE-120 Gas Condensing Boiler, 120 MBH - 7722773
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The Viessmann Vitodens 100-W B1HE-120 (7722773) is a wall-mounted gas condensing boiler dedicated to space heating. With a 12-120 MBH input range and 95% AFUE, it pairs well with an indirect tank for domestic hot water.
DOE heating capacity is 113 MBH and the Net AHRI water rating is 98 MBH. An Inox-Radial stainless steel heat exchanger is designed for condensing operation, and the 10:1 turndown helps limit short cycling. The boiler switches between natural gas and LP through a software setting, and integrated Wi-Fi connects to the ViCare app for schedules and alerts.
Venting is 80/125 mm concentric (5 in. x 3 in.) or 3 in. or 4 in. polypropylene/CPVC two-pipe. Heating supply/return and gas connections are 3/4 in. NPT, maximum operating pressure is 60 psig, and the cabinet is 17.75 in. wide with front access for service.
Highlights
Input range 12-120 MBH with 10:1 turndown
95% AFUE; DOE heating capacity 113 MBH, Net AHRI 98 MBH
Software conversion between natural gas and LP
Inox-Radial stainless steel heat exchanger
ViCare app control over integrated Wi-Fi
Specifications
Brand | Viessmann |
Model | 7722773 |
Input | 12-120 MBH |
DOE heating capacity | 113 MBH |
Net AHRI (water) | 98 MBH |
Efficiency | 95% AFUE |
Turndown | 10:1 |
Fuel | Natural gas or LP |
Max pressure | 60 psig |
Venting | 80/125 mm concentric or 3 in./4 in. two-pipe |
Heating connections | 3/4 in. NPT |
Gas connection | 3/4 in. NPT |
Electrical | 120 V, 60 Hz |
Height | 33.75 in. |
Width | 17.75 in. |
Depth | 19.75 in. |
Weight | 143 lb |
In the box
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.