Published at Tuesday, 15 January 2019. Kitchen Window and Ventilation Hood. By Ulf Madsen.
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.
Venting the polluted air out of your house is always preferable to recirculating it. Recirculating fans use charcoal filters to clean the air and release it back into the house when ducting to the outside is impossible, as in many apartment buildings. When it's the only option, a recirculating hood is better than no ventilation at all, but this type should never be used with pro-style appliances.
Build a custom decorative box to cover your old range hood. Reorganize your kitchen, so you don’t need the extra space of an overhead cabinet and then cover the front and sides with wood that you can stain or paint as shown here. You’ll still have access to the vent controls by reaching underneath. And, the front ledge works as a spot for small fun or functional objects.
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