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On Mon, 10 Apr 2006 19:47:54 GMT, "PipeDown" <nowhere@earthlink.net>
wrote:
>
>"Nehmo Sergheyev" <nehmo54@hotmail.com> wrote in message
>news:1144528935.092959.147110@j33g2000cwa.googlegroups.com...
>> Tony Hwang wrote:
>>> Hmmm,
>>> First real air tight house isn't easy to build. If you pressurize I
>>> do not think it has to be air tight. Real problem is how big a turbine?
>>
>> Nehmo -
>> I have not 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've
>> 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
>>> Air liners do that.
>>
>> Nehmo -
>> Airline cabin pressure can go as low as 75% one atmosphere or
>> equivalant to an altitude of 8,000 feet.
>> http://www.aerospaceweb.org/question/atmosphere/q0206a.shtml
>> The fact is not relevant. I just found it while looking around and I
>> thought I would share it:-)
>> --
>> (||) Nehmo (||)
>>
>
>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 do not 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.
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Re: Pressure Vacuum Cleaner for Whole House
