retrofit range hood idea
My house has a recirculating range hood. I’ve been mulling over different ways of implementing a proper one. I plan to keep it under 300cfm, but my house is very tight so I’d still want to provide makeup air in some fashion. Simplest option would be opening the kitchen window, which is about 5 feet away on the same wall. Is that far enough to avoid short circuiting? There’s also the option to switch the ERV exhaust fan off when using the range hood. The control is in the kitchen, so it wouldn’t be that much of a chore. The ERV is capable of about 250cfm.
My question has to do with the hood itself. My idea is rather than just adding a duct to the current range hood, I’d put in an 8″ ECM blower right in the duct. The duct can go straight out the wall, and the wall is plenty thick enough to accommodate this configuration. The benefit is that it would be much quieter and it can be fine tuned for flow. I already have the blower that I’m not using for anything else, so that part would be free. Any compelling reasons not to do this?
Also looking for suggestions for best/simplest airtight way of closing this off when not in use. Something wired into the fan control would be ideal.
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