Viessmann 7722776 Vitodens 100‑W B1KE‑120 120,000 BTU High‑Efficiency Combination Boiler
Meet the Vitodens 100‑W B1KE‑120—Viessmann’s compact, wall‑hung 120,000 BTU
high‑efficiency condensing combi boiler that delivers space heat and continuous on‑demand hot water in one streamlined appliance.
With a 95% AFUE, a 10:1 turndown ratio, and a durable Inox‑Radial stainless steel heat exchanger, it’s engineered to lower operating costs while keeping comfort steady. Built‑in WiFi brings Viessmann’s ViCare app to your phone for remote control and scheduling.
- Brand: Viessmann
- MPN: 7722776 (Vitodens 100‑W B1KE‑120, Combi)
- Type: Wall‑Mounted, Gas‑Fired Condensing Combi Boiler
- Fuel: Natural Gas or LP (field convertible; no mechanical adjustments)
- Space‑Heating Input: 12–120 MBH
- DOE Heating Capacity: 113 MBH
- Net AHRI Rating: 98 MBH
- AFUE: 95%
- Turndown Ratio: 10:1
- DHW Continuous Draw: 3.3 GPM @ 77°F (43K) rise
- DHW Max Supply Temperature: 140°F
- DHW Minimum Activation Flow: 0.5 GPM (plate heat exchanger)
- DHW Max Flow Through HX: 3.7 GPM
- Vent Size / Options: 3" flue; 5" × 3" coaxial or 2‑pipe PP(s)/CPVC; vent runs up to 180 ft (layout‑dependent)
- NOx Emissions: < 20 ppm (at 3% O2)
- Altitude: Up to 10,000 ft without input de‑rate (software setting)
- Noise Level: ~59 dB at full load; ~34 dB at part load (1 m)
- Heating Connections: 3/4" NPT (supply/return)
- Dimensions (W × D × H): 17.7" × 19.7" × 33.8" (450 × 500 × 859 mm)
- Weight: 110 lb
- Included: 30 psi boiler PRV, 150 psi DHW PRV, outdoor sensor, integral boiler/DHW pump
- Warranty: Limited lifetime (residential applications)
High Efficiency, Low Operating Costs
The Vitodens 100‑W pairs a 95% AFUE with a wide 10:1 turndown to match output to demand, minimizing cycling and fuel use. Viessmann’s MatriX‑Plus burner and Lambda Pro Plus combustion control deliver clean, efficient performance on natural gas or LP.
On‑Demand Domestic Hot Water
Enjoy continuous hot water without a tank. The B1KE‑120’s plate heat exchanger delivers up to 3.3 GPM at a 77°F rise, with a maximum DHW temperature of 140°F and quick response from a 0.5 GPM minimum activation flow. Ideal for typical two‑bath homes and light‑commercial applications.
Durable Stainless Steel Core
At the heart is Viessmann’s Inox‑Radial stainless steel heat exchanger—paired with the MatriX‑Plus stainless steel burner—for long service life and sustained efficiency. The series carries a limited lifetime residential warranty for added peace of mind.
Quiet, Compact, Easy To Install
A slim 17.7"‑wide cabinet, zero clearance to combustibles, and front‑access service make tight installs simple. Bottom connections streamline piping, and sound levels around 59 dB (full load) help keep mechanical spaces quiet.
Flexible Fuel & Venting
Factory‑set for natural gas with straightforward LP conversion, the 100‑W supports concentric 5" × 3" coax or 3" two‑pipe venting options with runs up to 180 ft (layout‑dependent). It’s rated for altitudes to 10,000 ft without input de‑rate and meets <20 ppm NOx requirements.
Smartphone Control Built In
Integrated WiFi connects to the ViCare app for remote temperature control, DHW scheduling, usage insights, and alerts—no add‑on gateway required.
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Technical Data Manual
