FIELD: construction.
SUBSTANCE: proposed device comprises vent tubes to discharge dirty air from back rooms and combustion products from heaters extending through roofs and air ducts. Attic floor is provided with hollow cylindrical case to house coaxial blower and ejector connected therewith in series. Note here that air ducts communicate said ejector with vent tubes. Besides, said case has inlet and outlet nozzles.
EFFECT: higher operating reliability.
3 dwg
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