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Offlinestonian
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Registered: 03/06/22
Posts: 8
Last seen: 2 years, 2 months
Need help selecting blower for laminar hood
    #27684959 - 03/06/22 11:33 AM (2 years, 2 months ago)

Hi, I'm building a 24"x36" HEPA laminar hood. I've purchased the filter, rated at .79 wg. My calculation for the blower CFM is: 2 x 3 x 100 = 600 CFM. I'll be adding a prefilter with ~.2 wg static pressure for a total of 1.0 wg. I've been looking at several blower charts to find that combination (600 CFM @ 1.0 wg), and haven't found one that fits. The closest I've found is the Dayton 1TDU2. At 1.0-1.1 wg the output is 975-1000 CFM, or effectively 162-167 CFM through the filter. That is a 3rd more airflow than I need, and I'm concerned that spores from spore prints may blow away.

I also looked at the Dayton 1TDT8, but at 1.0 wg the CFM is only 360, or 60 CFM through the filter.

Can someone with experience in this area advise me on a better blower model? Or, can I put a switch on the blower (low, high) to geta lower RPM, and CFM closer to 100? I'm not sure I want to restrict airflow. Thanks!

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OfflineCrackatoa
Stranger in a strange land
I'm a teapot User Gallery


Registered: 03/31/19
Posts: 5,405
Loc: Over by your Mama's house Flag
Last seen: 23 days, 15 hours
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Re: Need help selecting blower for laminar hood [Re: stonian]
    #27693824 - 03/13/22 01:39 PM (2 years, 2 months ago)

Go with more power and you can install a fan speed controller. Dayton makes one. There's no blowing away the spores on a print, sometimes swabbing them is a pain.


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Crack's Tek's and Shit


Edited by Crackatoa (03/13/22 01:39 PM)

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Invisiblesandman420
Saint PP
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Registered: 06/17/04
Posts: 5,384
Trusted Cultivator
Re: Need help selecting blower for laminar hood [Re: Crackatoa]
    #27703180 - 03/21/22 07:45 AM (2 years, 1 month ago)

1tdt8

your filter is 0.79" at 175 fpm you want it at 90 fpm. See me signature.


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- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

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