Viessmann

Viessmann – Premium Heat Pumps, Heating Technology & Solar from Allendorf

Viessmann is one of Europe's oldest and most respected heating manufacturers – family-owned since 1917, headquartered in Allendorf an der Eder. The name stands for outstanding build quality, long-term service support and well thought-out system integration. At Jacob Warm you will find Viessmann heat pumps, electric boilers and solar collectors — with free shipping within the EU.

The Viessmann Ranges

Vitocal 200-S / 250-A / 300-A – air-to-water heat pumps
Premium heat pumps for new builds and renovations. The Vitocal 200-S is a split system with low sound levels — the exact figures are given in the technical data of each model. The Vitocal 300-A is the high-temperature variant, with flow temperatures up to 70 °C without an immersion heater – ideal for renovation projects.

Vitotron 100 / Vitotron 200 – electric boilers
Premium electric boilers with electronic control, high switching flexibility and smart integration into building management systems. Ideal for hybrid systems combining a heat pump with an electric boiler for peak load.

Vitosol 100-FM / 200-FM / 300-TM – solar collectors
Flat-plate collectors (100/200-FM, 2.3 / 4.6 / 6.9 m²) for domestic hot water and heating support. Vacuum tube collectors (300-TM, 1.26 / 1.51 / 3.03 / 4.54 m²) for the highest efficiency at low temperatures.

Why Viessmann?

• German premium quality: research, development and production in Allendorf since 1917, top material quality, 25+ years of service life
• System integration: heat pump, solar and controls from a single source
• Service network in Germany: certified Vitoservice companies nationwide, long spare-parts availability
• KfW funding: Vitocal heat pumps qualify for KfW funding — the amount depends on the programme conditions

KfW Funding in 2026 for Vitocal Heat Pumps

If you replace an old oil or gas boiler with a Viessmann Vitocal, you can receive a KfW grant. The grant consists of a basic amount plus several possible bonuses; how much you receive depends on your situation and on the KfW conditions in force at the time. Important: the application must be filed with the KfW BEFORE the work is commissioned — usually the installer does this together with you.

Delivery & Installation

Shipping within the EU is free — unfortunately we cannot deliver to islands. Items in stock usually arrive in approx. 4–6 business days, otherwise approx. 4–8 business days. For heat pumps containing F-gas, the delivery time starts once we receive the certified-installer documents. Installation is carried out by a Vitoservice-certified company of your choice. Questions? Write to us at office@jacobwarm.com.

FAQ

Which Vitocal for an older building?
The Vitocal 300-A, with flow temperatures up to 70 °C without an immersion heater – ideal for renovations with conventional radiators. For a new build with underfloor heating, the Vitocal 200-S.

How loud are the Vitocal heat pumps?
Sound levels differ by model and are given in the technical data of each unit. KfW funding has its own noise requirements — which models meet them is clarified by the installer when the application is filed.

Service life?
Vitocal 20–25 years, Vitotron 25+, Vitosol 25–30 years (with annual servicing).

More on Viessmann & Heating Technology

• All heat pumps
• Bosch as an alternative
• Electric boilers
• Solar components
• KfW funding 2026