If you are sufficiently far away from the pressurizing fan, there won't be any perceptible wind at all. The fan will create pressure more than flow. A conventional cleaning vacuum works by a difference in pressure between the room and the catch chamber (the tank of a shop vac perhaps). In the arrangement I'm considering, there still is the difference in pressure, but this time it's between the room and the great outdoors.
Possible: Maybe Practical: No way Effective: Barely
Implemented correctly you get: Boy in a bubble, Clean room, Positive pressure
Don't forget, if you run this in winter you will throw away at least two house fulls of heated air you paid for.
Cost effective: not a chance
I don't have a dog in this fight but my shop vac pulls about 40" of water with a nrew bag. That is about 1/10 of an atmosphere or about
1.4 pounds. Not a lot of pressure but I bet it will blow the roof off.
Only if your roof weighs less than 100 tonnes.
gfretwell -
Nehmo - What size motor does your shop vac have?
gfretwell -
Nehmo - Considering the inevitable leaks, it would take an enormous compressing fan to blow the roof off. (Your shop vac turned around wouldn't make that pressure in a house.) I'm thinking of a fan something on the order of 500 watts to 1KW. I'm not sure what pressure differential that would create in a tight house, but I suspect it would be enough to do some cleaning.
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