Pressure Vacuum Cleaner for Whole House

[Huge]

It wouldn't even be any good for that. Crunch, crunch, followed by the sight of your car rolling away ...

[JerryD(upstateNY)]

[CWatters]

Fire places, letter boxes, trickle vents in windows and any openings the builder missed.

[Phil L]

You must be the only one who does, with the exception of course of those who wish to rob you blind, and by that I mean those who will promise to copyright it, market it and all the associated hangers on who want big fat fees up front, they'll think it's fantastic and tell you that you'll make a million from it, they are just interested in seperating you from your cash.{1}

My advice is ditch it, no one in their right mind would be interested in having it in their home.

{1} And one of the things they will claim is that it's a must for asthmatics, it's not, if anything it will put more dust into a room than it will extract.

[The Medway Handyman]

Don't mention that :-)

I'll get my coat.................

[Nehmo Sergheyev]

Nehmo - I haven't done any of the math regarding how large the pressurizing fan should be or what pressure should be achieved. But a rough estimate is possible: To simplify the problem, let's say the house has no vents, no plumbing fixtures, no gas appliances, and the house is of an almost airtight modern construction. I often use a 6.5 amp (120 Volts) shop vac and get respectable results. I imagine using an 11 amp fan (I have one) as the pressuring means would get reasonable results at the pick-up tube.

The next step in something like this is to experiment a bit.

Tony Hwang

Nehmo - Airline cabin pressure can go as low as 75% one atmosphere or equivalant to an altitude of 8,000 feet.

fact isn't relevant. I just found it while looking around and I thought I'd share it:-)

[Nehmo Sergheyev]

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.

[Al Bundy]

Guy King wrote in news:31303030343237394436F25672 @zetnet.co.uk:

Oh my. You must be from my era!

As #&%!ed up as my memory is, the 1976 concert at Shea Stadium NYC/USA was excellent. What I remember of it anyway....:-)

[Grumman-581]

The absolute BEST that any whole house (or other type) vac could do is approximately 14.7 psi (1 ATM) pressure differential... You can't go less than a pure vacuum, so that's it... THEORETICALLY, the OP's idea could produce better results since one could design it to produce more than 1 ATM of pressure in the enclosure... From a practical standpoint, I seriously doubt that a person would be able to make their house *that* airtight... Think of it this way -- a 32"x68" door is 2176 sq-in in area... At *only* a

14.7 psi pressure diffential, that would would need to be able to withstand nearly 16 tons... Actually, the house wouldn't be blown all over the neighborhood... You need a lot more pressure differential than that to get something blow up... You would probably start getting various seams to leak first and then you wouldn't be able to pump air into it as fast it was leaking out...

[PipeDown]

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

[gfretwell]

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.

[Nick]

Only if your roof weighs less than 100 tonnes.

[nehmo54]

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.