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As the first heating medium boiler with a built-in air preheater on the rear part of the body, its efficiency (91~95%) is very high.
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It is possible to install in a small space since this unit does not require a separate external air preheater and the installation area is small.
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Since the front and rear parts of boiler can be opened completely, it is easy to perform repair/maintenance.?
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Since a fire-resistant heat insulator is constructed on the rear side of boiler, no dew condensation occurs by the retained
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potential heat even at the time of boiler interruption.
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Since the combustion gas passes through the outside of heat pipe, it maintains its life span identical to that of the boiler
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because there is no clogging by dust and it is easy to clean the unit.
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Since the high temperature air is kept by making a layer of air outside of the body even when restarting the unit, the unit is high
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in combustion efficiency, has almost no radiation loss, and the appearance is clean because it has no external air duct.
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