Viessmann wall mounted condensing boilers are especially suitable for installation in apartment buildings, public and commercial buildings. Vitodens 300 offers a space saving, attractively priced solution – either as a single unit up to 66 kW, or in a cascade comprising up to four boilers with an output of up to 264 kW.

High output: minimum space requirement

The parallel stainless steel, corrosion resistant Inox-Radial dual-spiral heat exchanger offers high output in a minimum of space, effecting a high standard efficiency of up to 109%.

Efficient and clean

The modulating MatriX-compact gas burner is suitable for all types of gas. With its extremely low emissions, the performance is significantly better than the limits set for the "Blue Angel" certificate of environmental excellence.

Cascade control unit

The Vitotronic cascade control unit regulates up to four Vitodens 300 as one unit. In this way, the boiler output is automatically matched to the heating demand. For you this means, subject to the prevailing demand, either one boiler modulates or all four boilers operate concurrently.

Everything from a single source

For the construction of cascade systems, Viessmann offers a solution whereby the system technology matches perfectly, e.g. control units with up to four terminal adaptors, flue gas headers or hydraulic cascade units.


Benefits at a glance:

• Gas condensing boiler for 12.2 to 49 kW and 16.6 to 66 kW.

• As cascade controlled multi-boiler system up to 264 kW.

• Standard efficiency: up to 109%.

• Automatic flue gas adaptation for permanently high efficiency.