| 摘要 |
An exhaust hood may be fabricated which will reduce the rate of exhaust air quantities circulated through the exhaust hood and thereby reduce the quantity of make up air supplied to the exhaust hood from the conditioned space with a resultant energy savings. The exhaust hood may include a supply plenum, an exhaust duct and a partial pressure chamber coupled to the supply plenum. A partial pressure is formed within the partial pressure chamber which is provided with at least one venturi slot at its lower extremity. Typically, two venturi slots are employed to produce a partial pressure region exterior to the partial pressure chamber, which region is juxtapositioned to an inlet port provided in the exhaust duct.
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