2 fans 1 filter?

[967]

My ventilation system kinda sucks and centrifugal fans cost shiteloads where I come from. So I'm wondering if two inline fans connected to a y-splitter, sucking through a carbon filter would be much of an upgrade if any?

 

[Kushy]

Depends on the inline fans, the size of the fans, ect. 2 is better than 1 tho. If its for smell then just circulate the room and not exhaust out. MAny possibilities. I started a 1000w with a little inline from home depot. Worked good. But not fantastic.

 

[967]

Smell is in check but I don't think I get sufficient airflow and with a new bulb my temps soar. Also my filter is about a year old so could be clogged? Exhaust setup doesn't work as well as it used to and I can't afford a centrifugal at the moment

 

[ak-51]

Are you talking about using duct boosters? I'm not sure those have the torque to pull through the kind of resistance a carbon scrubber presents. What are you using now?

 

[967]

Currently using 6" inline fan, don't think a duct booster but similar. Think its 170cfm. If I was to get another that wouldn't really equal a 340cfm fan would it?

 

[Jaymer]

something i've thought to try so as to make the most out of two inline fans was to seal an airtight cardboard box( or cylinder ) around the filter and have a fan pushing air into the filter and out into the box with the bigger fan pulling air out of the top of the box increasing filtered airflow, more so than a y connector pushing and pulling on each fan differently.

 

[frankenstein2]

something i've thought to try so as to make the most out of two inline fans was to seal an airtight cardboard box( or cylinder ) around the filter and have a fan pushing air into the filter and out into the box with the bigger fan pulling air out of the top of the box increasing filtered airflow, more so than a y connector pushing and pulling on each fan differently.

I think some filters even have removable end caps for reversing flow. You could take the box off and hook the other fan directly onto the filter. It would be fan->ducting->filter->fan. or something like that. I just did some dabs......

 

[ak-51]

I don't think those filters work like that.

I believe that when a filter has end caps that can be reversed that it is for the purpose of using all of the carbon more evenly. A bit like rotating tires. I think that with a long cylindrical carbon scrubber, the carbon nearest the fan end gets the most air moved over it, and thus is probably spent sooner, while the carbon at the far end of it gets much less air moved over it, and is fresh for longer. Switching the end once in a while would even out this disparity.

I think if you put the filter in a box then yes you could push into the box and pull out of the scrubber.

 

[967]

Interesting concept. My filter has no removable parts which is kinda gay. To refill I will have to cut and weld I think. Or maybe its held together by rivets, can't quite remember but either way refilling will be a bitch. Pushing air in a box with filter and pulling through the filter would improve airflow over two fans with a duct each and a 2 - 1 duct reducer (y splitter)? Kinda don't see why is that because once a pressure builds inside the box it'll be forcing through the filter? While other fan is still pulling? Instead of two fans pulling

Hopefully I have some investment money coming in, in which case I'll get a 700cfm fan. Otherwise will try this and see how it goes. Its only really wasting time if it doesn't work well, provided I can source the wood for free

 

[967]

Wait what I just said is the reverse of your idea jaymer - push air into box and pull through filter whereas you said push through filter and pull out of box.. Which would be better?

 

[ak-51]

Pushing air in a box with filter and pulling through the filter would improve airflow over two fans with a duct each and a 2 - 1 duct reducer (y splitter)? Kinda don't see why is that because once a pressure builds inside the box it'll be forcing through the filter? While other fan is still pulling? Instead of two fans pulling

I think if you had a Y and 2 fans pulling then a portion of power would be wasted by the 2 fans working against each other.

In the boxed carbon scrubber idea you would have one fan creating positive pressure on the outside of the filter, and the other putting negative pressure on the inside of the filter. I think it would coax it through the filter better.

A good in-line fan would be sufficient though.

 

[Jaymer]

I think if you had a Y and 2 fans pulling then a portion of power would be wasted by the 2 fans working against each other.

y connectors are a resort for two separate rooms, if trying to fill those rooms faster ... with two different fans one room would fill really quick and the other would be stagnant. this principle should apply similarly if you are venting out into only one room.

putting a split duct connector to use would be having one fan blowing through two filters as a filtered dual exhaust, and might help your fan push more air out.

Wait what I just said is the reverse of your idea jaymer - push air into box and pull through filter whereas you said push through filter and pull out of box.. Which would be better?

push air through the encapsulated filter with the extra fan pulling air from out of the capsule like a syringe.