FIELD: engines and pumps.
SUBSTANCE: heating device includes housing, convection tubes arranged in it, furnace and secondary air supply device directly interconnected with the furnace. Furnace is insulated in furnace space with a casing provided with holes that have heat insulation.
EFFECT: increasing efficiency of heating device and reducing the concentration of emissions of hazardous substances to atmosphere at combustion of solid fuel, and enlarging service life.
10 cl, 6 dwg
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