Windhager FKU 25 kW

Windhager – premium Austrian heating technology. Among the manufacturer's solid fuel boilers, the FKU represents traditional, manually loaded solutions.

FKU – easy-to-operate solid fuel boiler. Listed in the portfolio as a 25 kW unit, it can be designed for central heating; its exact FKU subtype and output per fuel type are still to be identified using the original data plate.

• Manual loading: the amount of fuel can be adjusted to the momentary heat demand.
• Mechanical draft control: the FKU factory installation manual mentions a water temperature-adjusted air regulator.
• Water-based central heating: the generated heat can be fed into a radiator system or another properly designed heating system.
• Thermometer and minimum temperature controller: according to the family documentation, the boiler temperature can be monitored and the pump start can be adjusted.
• Boiler protection design: the factory manual accounts for an overheating safety heat exchanger; the presence of this specific unit must be verified.

Documentation: The enclosed French-language factory installation manual: FKU 093465/00, 04/2013. This contains FKU 165/215/265/335 dimensions; the old unit cannot be reliably identified by a single nominal 25 kW data point. Family-level information: applicability to the specific boiler must be coordinated based on the data plate. Factory manual.

New price – check: 2026.10.06. Searches on wolf-online-shop.de, heizung-billiger.de, and heizungsdiscount24.de did not yield a verifiable, identical new boiler offer. For the current new price, a custom quote is required, with currency, net/gross status, and itemized equipment.

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