Kalorina Serie 25 E Medium PowerClass 3
151–581 kW
Kalorina Serie 25 E Medium Power — Front view
High-output hot air generators with versatile, innovative technology for efficient and rapid heating with low thermal inertia. Autonomous heat sources installable without hydraulic systems in large spaces such as workshops, warehouses, shopping centres, gymnasiums, agricultural holdings and greenhouses.
Autonomous heat sources without hydraulic system
Manufacturer-certified fuels
Compliant with European EN ISO 17225 standards — performance guaranteed by the original technical sheet.
Wood chips
Shredded wood chips, granulometry P16S to P31S. Cost-effective solution for large surfaces and automated silos.
Wood pellets
Cylindrical compressed wood pellets, Ø6 to 8 mm, moisture < 10%. Standard high energy density fuel.
Log wood
Dry log wood, length 33 to 50 cm, moisture < 25%. Manual loading, autonomy depending on the firebox.
Cereals / Agro-pellets
Compressed cereal blends and agricultural residues. Circular solution for farms.
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 Medium Power: 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.
