Viessmann Vitopend 100-W A1JB 12 kW 12 kW (A1JB009)
 | Outdated Product Wall-mounted double-circuit gas boiler with a closed turbocharged combustion chamber and a fan for the forced removal of combustion products. It is the youngest model in the line of similar devices of the 2017 model year, it is positioned as a product of the middle price category. It can be a good choice for organizing a new or upgrading an existing heating and hot water supply system for a private house or an apartment in an apartment building with a total area of up to 96 m². (with a ceiling height of 2.5-3 m). It is important that the use of a closed combustion chamber and a forced smoke exhaust system allows you to install it directly in residential premises. The Viessmann Vitopend 100-W A1JB 12 kW boiler has a considerable useful power, which allows, in addition to heating, to provide...water heating in an amount of up to 11.2 L / min (at delta temperatures up to 22 °C). The efficiency of the device is ensured by a fully modulating gas burner and a proprietary microprocessor control system that allows you to control all the most important parameters on a high-contrast monochrome LCD screen. The boiler demonstrates an acceptable efficiency (86%) and is equipped with protective systems that are triggered in the event of a flame out, no draft or a violation of water circulation in any of the circuits. It is adapted for operation in the conditions of east european gas and electric networks: it works at a low inlet pressure of gas and water, it is resistant to power voltage fluctuations. |
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Viessmann Vitopend 100-W A1JB 12 kW 12 kW
Energy source:gas
Mount:wall, dual-circuit
Boiler power:12 kW, area ~ 96 m²
Combustion chamber:closed, flue 60/100 mm
DHW temperature:from 35 °С, up to 57 °С
Wall-mounted double-circuit gas boiler with a closed turbocharged combustion chamber and a fan for the forced removal of combustion products. It is the youngest model in the line of similar devices of the 2017 model year, it is positioned as a product of the middle price category. It can be a good choice for organizing a new or upgrading an existing heating and hot water supply system for a private house or an apartment in an apartment building with a total area of up to 96 m².
(with a ceiling height of 2.5-3 m). It is important that the use of a closed combustion chamber and a forced smoke exhaust system allows you to install it directly in residential premises. The Viessmann Vitopend 100-W A1JB 12 kW boiler has a considerable useful power, which allows, in addition to heating, to provide water heating in an amount of up to 11.2 L / min (at delta temperatures up to 22 °C).
The efficiency of the device is ensured by a fully modulating gas burner and a proprietary microprocessor control system that allows you to control all the most important parameters on a high-contrast monochrome LCD screen. The boiler demonstrates an acceptable efficiency (86%) and is equipped with protective systems that are triggered in the event of a flame out, no draft or a violation of water circulation in any of the circuits. It is adapted for operation in the conditions of east european gas and electric networks: it works at a low inlet pressure of gas and water, it is resistant to power voltage fluctuations.
All specifications
Specifications Vitopend 100-W A1JB 12 kW
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The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Viessmann 2025 - new arrivals, bestsellers, and the most relevant models Viessmann.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Viessmann 2025 - new arrivals, bestsellers, and the most relevant models Viessmann.
Model overview based on user reviews
The Viessmann Vitopend 100-W A1JB 12 kW is a compact and economical double-circuit gas boiler, ideal for small houses up to 96 square meters. Users appreciate its high German build quality and reliable performance, with features like protection against power fluctuations and auto-adjustment to external temperatures, ensuring pipes don't freeze during cold snaps. It is noted for its low gas consumption, with a maximum of 1.4 cubic meters per hour, making it cost-effective for heating and domestic hot water (DHW). While generally praised for its quiet operation and ease of use, some users have reported issues with faulty temperature sensors in certain batches. Overall, it is considered a reliable and efficient choice for small households, especially in regions with moderate climate conditions.
Pros
Cons
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We also have it hanging in our dacha. We bought a standard house with 2 bedrooms, 90 square meters in the south of the Moscow region. The pipe was narrower, the designers recommended this boiler, they say, it was inexpensive and reliable. We didn’t regret it, even though the model is very simple. But all the necessary functions and sensors are there, such as protection against flame extinguishing or if there is no draft, or in some circuit something happened to the water circulation. DHW is ok, my wife and I live together, we have enough. And it’s very good that his appetite for gas is very modest, even the maximum consumption is 1.4 cubic meters per hour, but for us it almost never works at the maximum. Overall, it’s just right for a small house for 2 residents. small, inexpensive, warm a bit noisy  Kirill: use Viessmann Vitopend 100-W A1JB 12 kW more than year |
The boiler is installed at the cottage; the house is small, 86 square meters, so we chose a 12 kW unit plus considering the dimensions: the boiler is only 40 cm wide and just over 30 cm deep, which was important given our space. The boiler works for heating and DHW or only for DHW in the summer. We live at the cottage from mid-April to mid-October; this is Siberia, so we need to heat in spring/autumn. We turn it off for winter. During all the time we’ve used it, there have been no complaints. It operates quietly, reliably, and has a very modest gas consumption. The boiler has many "protections" and self-diagnosis systems, so there’s no fear of sudden shutdowns. It's very easy to operate, the controller is simple, with backlighting. We didn’t buy any additional sensors, although they say it can adjust automatically according to the weather. For now, we adjust it ourselves. It listens))) reliable, economical we've been using it for 5 years and haven't found it yet  Valentina: use Viessmann Vitopend 100-W A1JB 12 kW more than year |
Good dual-circuit boiler for a small house in the middle zone. The capacity is only 12 kW, but it's enough for heating 80 square meters and hot water. The unit itself is compact, with high German build quality. The consumption is small, judging by neighbors. And most importantly, we can leave the cottage with peace of mind, knowing there's protection against power fluctuations and auto-adjustment according to external temperature, meaning the pipes won't freeze during sudden cold snaps. Low consumption ytn Viktor Vahalidze: use Viessmann Vitopend 100-W A1JB 12 kW more than year |
3 out of 4 user review(s) shown
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