Pellet heating System

Heating with pellet stoves & pellet boilers

├ľKOfen pellet heating system As far as the system technology is concerned, pellet heating systems are to be basically divided into two groups.

RIKA pellet stove The area of application of a pellet heating system is very varied and broad based. Pellet heating systems are especially suitable for detached and semi-detached houses as well as apartments of every size. The use in larger living complexes is also optimal, as well as in the commercial, communal and industrial sectors. As a result of the various technologies, performance sectors from 5 kW up to 100 kW heating output in cascade connection are possible.

Combined or hybrid pellet heating systems can be additionally fuelled with split logs or wood chips. A pellet heating system can be controlled to approx. 30% of its nominal heating output. Heating operation together with a heat buffer system is ideal for the efficiency of the complete system.

The method of charging and combustion of the pellet fuel is divided into 5 technologies.

In order to optimize efficiency and pollutant content of exhausted air, modern pellet heating systems control combustion either via a temperature or flame space sensor in combination with an infinitely variable input of combustion air via a suck-blow fan or a lambda probe. The hot flue gases are led into the chimney via a heat exchanger with manual or automatic cleaning of the reheating surfaces.

Most pellet stoves are equipped with burnback protection. Generally good pellet heating systems are configured for very safe and almost fully-automatic operation, so that cleaning and maintenance work are only necessary at intervals of several weeks or months depending on the type of system involved. Several pellet heating systems achieve maintenance intervals of once per annum and are therefore almost as convenient as comparable oil or gas-fired heating systems. Some manufacturers of pellet stoves recommend daily cleaning of the burn pot for safety reasons.

For modern pellet heating systems, the emission of fine dust is approx. 8 mg per MJ heat quantity equal to 29 mg/kWh. In the meantime pellet heating systems have been developed which by means of optimized combustion, can undercut the specified emission limits and can also be installed where tighter specifications are applicable. Such heating systems operate with condensing technology and have relatively dust and soot free flue gases (approx. 4 mg fine dust per MJ). In comparison, fine dust emissions for single stoves (fireplaces, tiled stoves) are approx. 150 mg/MJ, for wood-burning boilers approx. 90 mg/MJ, and for oil-fired heating systems approx. 3 mg/MJ.

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