Kalorina Serie 25 EClass 3
151–581 kW
Kalorina Serie 25 E — Front view
The industrial hot air generators Kalorina series K25 wood chips constitute innovative and safe heating systems. They guarantee high performance in the production of large volumes of hot air.
Independent and autonomous operation
Available models(1 variant)
Manufacturer-certified fuels
Compliant with European EN ISO 17225 standards — performance guaranteed by the original technical sheet.
Log wood
Dry log wood, length 33 to 50 cm, moisture < 25%. Manual loading, autonomy depending on the firebox.
Wood pellets
Cylindrical compressed wood pellets, Ø6 to 8 mm, moisture < 10%. Standard high energy density fuel.
Specifications according to the manufacturer's technical sheet. Using non-compliant fuels voids the warranty and may shorten the boiler's lifespan.
Kalorina Serie 25 E: grants
In Germany, replacing a heating system with a biomass boiler (pellets, logs, wood chips) in an existing residential building is subsidised by KfW (programme 458, Federal Funding for Efficient Buildings).
KfW 458 — heating grant for private individuals (BEG EM)
Base grant of 30 % of eligible costs, plus bonuses depending on the situation (climate speed, household income); up to 70 %, or 80 % with the income bonus. Eligible costs capped at €28,000 for a single-family house.
- EXISTING residential building; apply to KfW BEFORE work starts
- Supply or service contract signed with a condition precedent or subsequent
- Climate speed bonus (16 %) when replacing a gas or biomass heating system at least 20 years old; it decreases from 01/02/2027
- Income bonus (40, 30 or 10 %) for owner-occupiers depending on taxable household income
Information checked on October 14, 2026.
