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OfflineGan
Wielder of Narya
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Registered: 08/26/19
Posts: 927
Loc: Valinor
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Pre-filter box optional?
    #26760225 - 06/20/20 04:35 PM (3 years, 7 months ago)

Is there any benefit I'm overlooking for a prefilter box other than it makes it easier to mount a prefilter on a flow hood? I'm currently building a 24x36

I move fairly often for work and if I can avoid the extra weight of a prefilter box, that would be great for moving. I know many people just tape or fix their prefilter to the blower intake without a box, but I've never researched about whether it could decrease performance or hurt and/or lessen the life of the blower.


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Edited by Gan (06/20/20 05:09 PM)


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Invisibletrippymang69
Trippy Mang

Registered: 03/26/19
Posts: 11
Loc: PNW
Re: Pre-filter box optional? [Re: Gan]
    #26760827 - 06/20/20 10:39 PM (3 years, 7 months ago)

I just built a 24x48 flowhood. Built a blower box on top with a 10"x12" cut out for a pre filter. The flow hood would cut out because it was only receiving air through one side, the side with out the motor. this led the motor on the opposite side to over heat and triggering the thermal cut off for the fan. Since your flow hood is larger than most, and thus your blower is too, all i can say is make sure it gets enough air. No box will do this, but if you have a squirrel cage blower like me it will be difficult to prefilter the motor side without a box. one option is to build a box for the blower but to leave the top cut out for a large prefilter, maybe 2'x2' or at least 1.5'x1.5' probably. a surface area similar. Its going to be heavy anyway, id install handles and a top oriented 1.5'x1.5' prefilter, just my opinion 4 days away from finishing my flow hood.


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OfflineSHROOMSISAY01M
Mr. Shrooms
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Registered: 01/22/17
Posts: 3,849
Loc: Virginia, USA
Last seen: 1 hour, 53 minutes
Trusted Cultivator
Re: Pre-filter box optional? [Re: trippymang69]
    #26760843 - 06/20/20 10:51 PM (3 years, 7 months ago)

Or just buy an FFU (fan filter unit). There light and most are plug and play. I bought two 2 x 4 foot for $70 each brand new in the box from HGR. I used to live close to HGR so I did not have to worry about shipping. But these units cost about $1200 if you buy them new. Myers mushroom sells them on his site for $600. Search for clean room on HGR to find them. They have two of them for $119 right now plus shipping...



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OfflineMartinsapin
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Registered: 09/12/16
Posts: 310
Loc: Canada Flag
Last seen: 1 year, 7 months
Re: Pre-filter box optional? [Re: SHROOMSISAY01]
    #26779666 - 06/24/20 03:17 PM (3 years, 7 months ago)

Ive taped a high efficiency filter that ive cut to fit the dimensions on the air intake of my blower. Looks ugly but it works


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