Published at Thursday, 31 January 2019. Kitchen Window and Ventilation Hood. By Osvald Henriksen.
So where does a powerful range-hood fan get its makeup air? If the house doesn’t have enough random air leaks around windows, doors, and mudsills, the makeup air is often pulled backwards through water-heater flues or down wood-burning chimneys — a phenomenon called backdrafting. Since the flue gases of some combustion appliances can include carbon monoxide, backdrafting is dangerous. In some cases, it can be life-threatening.
Follow the heating equipment manufacturer’s guideline and safety standards such as those published by the National Fire Protection Association (NFPA), and the American Society for Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), and the local code authorities.
Simple, time-tested treatments that work for most periods include a valance or shaped pelmet (cornice), café curtains, sheers, roller and Roman shades, and Venetian blinds. If you have a pretty view or little room for curtains, a valance alone is enough to dress the window. A valance or pelmet also hides the working parts at the top of blinds and shades. Café (half, or sash) curtains can be stacked, but Ann Wallace says they are most often used only on the bottom sash, where they provide privacy without blocking too much light.
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