|
rjreynoldsinc4242
Stranger
Registered: 12/23/20
Posts: 6
Last seen: 3 years, 1 month
|
HELP PLEASE: flow hood guru needed
#27104555 - 12/23/20 05:08 PM (3 years, 1 month ago) |
|
|
i have a fasco brand blower i got for free its 115 volt 1/10 horsepower 3.25 amp 1625 rpm 60hz no.7008-6488 I cant find the specs for it but i was wondering if this was usable for a 24x24 flowhood or maybe a 12x 24 flowhood if anyone can help me out id greatly appreciate it!! ....p.s merry christmas everyone
|
rjreynoldsinc4242
Stranger
Registered: 12/23/20
Posts: 6
Last seen: 3 years, 1 month
|
|
anybody??
|
Vinci
I'm You



Registered: 08/26/19
Posts: 629
|
|
Man the compatibility depends on how much resistance your HEPA filt is rated at. Usually like 1.0wg for a 24x24. And the CFM rating of the blower at that wg. You gotta find a graph for it (I looked briefly. Might be able to help better if you upload some pics with any text on the blower visible.
Quote:
c10h12n2o said: Blower & Filter Matching Math
This part confuses a lot of people but it is a lot simpler than it might seem. We want a flow of around 100 feet per minute, so we need to:
#1 calculate the area of your HEPA filter. In my case, it is 2ft x 2ft = 4 sq. ft.
#2 multiply filter area by desired flow rate. in my case, 4 sq. ft. x 100 feet per minute = 400 cubic feet per minute
this number is the amount of air your blower must deliver at the sum of the STATIC PRESSURE of the HEPA filter + prefilter.
most HEPA filters of this type will be around 1" static pressure, and most prefilters will be around .2", which is the case with my filter from FP. so in my case, i need a blower that can do at least 400 CFM @ 1.2" static pressure
You can get great deals on used/salvaged blowers on craigslist or by calling HVAC repair shops and asking about salvage blowers, will save you several hundred dollars at least on the blower. the tricky part is finding something just right, and finding the blower info. for mine, i was looking for a 1/3 hp blower, but ended up getting a 1/4 and a 1/2 hp in the hope that one would work. you can always restrict the airflow or use a speed controller if it is too much
Since i couldnt find ANY info on the two salvaged blowers i found, i ended up getting one of those anemometers to determine cfm and flow stats, which indicated that the 1/4 hp was over 1200 CFM and would probably be sufficient. just in case, i designed it big enough for the 1/2 hp if i needed to switch them out
-------------------- Vinci loves you
|
dfwerydfhg
Stranger
Registered: 05/04/20
Posts: 194
|
Re: HELP PLEASE: flow hood guru needed [Re: Vinci]
#27107499 - 12/25/20 02:17 PM (3 years, 1 month ago) |
|
|
yeah without a performance curve that's not enough information to tell. that looks like the motor specs, not the fan- is there anything else written on it?
|
|