Vitodens 343 is an energy-efficient, environmentally responsible and advanced solution for modern heating with condensing and solar technology in detached houses.

The Vitodens 343 Compact Condensing Tower offers: energysaving condensing technology, powerful DHW heating through a cylinder storage system and fully wired solar preparation, all inside a casing with a footprint of only 677 x 600 mm.

Intelligent Lambda Pro Control

At the core of Vitodens 343 lies the new Vitodens 300 gas fired, wall mounted condensing boiler (13 kW) with the intelligent Lambda Pro Control.

Complete gas condensing and solar heating system in one compact case

The integral DHW storage cylinder in Vitodens 343 has a 250 litre capacity, is suitable for integration into a solar heating system and is convincing through high solar coverage based on its large cylinder capacity and the automatic storage suppression. The 16 kW booster function ensures high levels of economy, yet simultaneously provides excellent DHW convenience.

Future proof due to solar integration

Vitodens 343 is fully wired and prepared for solar operation, either immediately or in the future. Solar-Divicon and the Vitosolic 100 solar control unit are already fitted and ready for use. All functions are matched to one another, and have been factory tested.


Benefits at a glance:

• Gas fired condensing boiler with solar cylinder, Solar-Divicon and Vitosolic 100 solar control unit. Output: 4.2 to 13 kW (16 kW for DHW heating)

• Standard efficiency: up to 109%.

• Heating matched to demand with full DHW convenience through integral booster function.

• Intelligent Lambda Pro Control for gas type recognition and automatic matching of combustion, in case of changing gas qualities and operating conditions.

• Inox-Radial heating surface made from stainless steel: efficient, long-lasting and self-cleaning.

• Extremely low emissions through modulating MatriX gas burner – therefore performance is significantly better than the limits set for the "Blue Angel" certificate of environmental excellence.

• Enamelled 250 litre cylinder with solar heat exchanger and impressed current anode.

• Side clearances for service purposes are no longer required, as all components are accessible from the front.