Steel Heat Exchanger Wall-Mounted Boilers

Steel Heat Exchanger Boilers

High-Efficiency and Durable Heat Transfer Systems
Our Viwa S devices offer a long-lasting product experience with a steel heat exchanger, along with the ability to cascade without the need for internal valves and an intermediary card, providing you with a cost-effective installation option. These devices feature a powerful and efficient stainless steel DUO heat exchanger, ensuring high efficiency and long-lasting performance. With the Blue Jet Burner technology for perfect combustion, the Viwa S ensures low fuel consumption. Additionally, it is compatible with both hermetic and standard chimneys, and the Smart Socket-Plug system allows for easy, fast, and cost-effective cascade installations of up to 14 boilers.
Size Size
800 x 612 x 495 / 530 / 605 / 680 mm.
Heat Exchanger Heat Exchanger
Stainless Steel DUO Heat Exchanger
Capacity Capacity
Steel heat exchangers with different capacity options up to 90 kW, 100 kW, 125 kW, and 150 kW.
Cascade Installation Cascade Installation
Cascade installation feature for up to 14 devices without the need for an intermediary card.
Control Panel Control Panel
User-Friendly LCD Display Control Panel
Sound Level Sound Level
53-55 dB
Design Design
100% Domestic Design
Efficiency Efficiency
The efficiency that can reach up to 107%*
Advanced Heat Transfer Solutions for Optimal Efficiency
Viwa 50-65, the 'Smart Gas Technology Boiler' in its segment, offers both savings and safety in a single device with a high modulation range. Equipped with a stainless steel heat exchanger and burner, it ensures long-lasting performance while minimizing the risk of clogging. The Viwa 50-65 is optimized for high efficiency with an integrated aging system, and it is compatible with both hermetic and standard chimneys for easy installation. It also offers the ability to be used in tall buildings (up to 6 bar), with a central heating power of up to 389 kW across six cascades. Additionally, the device features a built-in sediment trap for minimized damage and can be controlled remotely through the RecoWa Smart Room Thermostat Kit and app for added convenience.
Size Size
725 x 420 x 385 mm.
Heat Exchanger Heat Exchanger
Stainless Steel Heat Exchanger
Capacity Capacity
Efficient solutions for different needs with 50 and 65 kW capacity options.
Cascade Installation Cascade Installation
Cascade Installation Feature for installations up to 390 kW with 6 x 65 kW capacity
Control Panel Control Panel
Easy-to-Use LCD Display Control Panel
Sound Level Sound Level
58-61 dB
Design Design
100% Domestic Design
Efficiency Efficiency
High efficiency with a 1:8 modulation ratio.