Published at Monday, January 28th 2019. by Pedersen Wilda in Kitchen Window and Ventilation Hood.
Some Passivhaus builders are experimenting with range-hood fans that don’t exhaust air to the exterior. Instead, they pull air from above the stove and pass it through a charcoal filter before returning the air to the kitchen. On the ceiling of the kitchen, in a location as far from the stove as possible, they also install a grille connected to the exhaust system of the home’s HRV.
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.
Ubiquitous roller shades can be rolled up, pulled down, or left in-between, providing the best light control and the most privacy. The old-fashioned spring-loaded ones eliminate cords. You don’t have to settle for white vinyl, or even plain fabric. Diane Hayes of Alameda Shade Shop suggests adding a special fringe or a scallop treatment at the bottom, or a stenciled decoration in paint
Buy a range hood with a small exhaust fan; for most homes, 150 cfm to 250 cfm is plenty. In a tight house, a stronger exhaust fan can cause problems with backdrafting. Most building codes (for example, Section M1507 of the 2006 IRC) require that kitchen range hoods have a minimum rating of 100 cfm. Broan makes a simple range hood (the 40000 series) rated at 160 cfm; you can find it in stainless steel for only $80 on the Web.
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.
Here’s the new IRC provision, which is found in section M1503.4: “Exhaust hood systems capable of exhausting in excess of 400 cfm shall be provided with makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system.
While these by-products may simply sound like nuisances, studies have shown that cooking without proper ventilation is one cause of poor indoor air quality that can negatively affect your health. That's why the International Residential Code and the U.S. Environmental Protection Agency strongly advise homeowners to install a vent hood to capture, filter, and then expel the fumes outside through a vent in an exterior wall or on the roof.
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