Has N E One Used This HTGSupply FAN?

Illegalbreather

Illegalbreather

Well-Known Member
jondamon

jondamon

Well-Known Member
^^^ agreed

that is just a gloryfied duct fan.

you have to pay if you want proper ventilation .


your intake should be reduced by 20%minimum of your exhaust.

500CFM exhaust - 400CFM intake

this will then keep enough negative pressure to stop odour leaks.


J
 
jawbrodt

jawbrodt

Well-Known Member
I use one to draw in fresh air from outside, and it works great. That's with no air restriction, though. They aren't worth a crap, for pulling air through filters, etc...
 
jondamon

jondamon

Well-Known Member
jawbrodt said:
I use one to draw in fresh air from outside, and it works great. That's with no air restriction, though. They aren't worth a crap, for pulling air through filters, etc...
Click to expand...
as an active intake it probably would work great , most people unfortunately have high expectations of these duct booster fans only to be pulled back down to the real world when they have temps of 38C/100F because they used it as an exhaust.


there is a reason that a good inline fan is the price it is.


Stump up the $'s now rather than after you've wasted $30 on that as an exhaust.


J
 
GibbsIt89

GibbsIt89

Well-Known Member
jondamon said:
as an active intake it probably would work great , most people unfortunately have high expectations of these duct booster fans only to be pulled back down to the real world when they have temps of 38C/100F because they used it as an exhaust.


there is a reason that a good inline fan is the price it is.


Stump up the $'s now rather than after you've wasted $30 on that as an exhaust.


J
Click to expand...
ya my plan was to use 2 of those as intake fans.. one to the veg. room then one exhausting veg. room to flower room, then a high tech fan for the exhaust with carbon filter in the flower room. but someone agreed before that it was "negative" pressure when i was exhausting at 170cfm and pushing in at 500cfm.. so im kinda confused now lol
 
GibbsIt89

GibbsIt89

Well-Known Member
do i want the room pressure to be higher or lower? and to what extent

if i use the 170 cfm exhaust and two 500 cfm inlets the pressure will be high by : 330 cfm
if i use the 170 cfm exhaust and two 250 cfm inlets the pressure will still be high: 80 cfm
if i use the 170 cfm exhaust and two 80 cfm inlets the pressure will then be low by: 90 cfm

this of course being the pressure in the flower room.
the veg room will be balanced unless someone suggests otherwise.

these inlet fans can't be used with a speed adjuster to control the cfm either.​
 
Serapis

Serapis

Well-Known Member
Inline fans are meant as booster fans. The CFM rating is with no restriction. Add a carbon filter, or bends in a duct and the CFM drop rapidly to the point of fan burn up. They do work fine for pulling air through a light hood however. I use two of them together to intake cool air into my closet.
 
Serapis

Serapis

Well-Known Member
GibbsIt89 said:
do i want the room pressure to be higher or lower? and to what extent

if i use the 170 cfm exhaust and two 500 cfm inlets the pressure will be high by : 330 cfm
if i use the 170 cfm exhaust and two 250 cfm inlets the pressure will still be high: 80 cfm
if i use the 170 cfm exhaust and two 80 cfm inlets the pressure will then be low by: 90 cfm

this of course being the pressure in the flower room.
the veg room will be balanced unless someone suggests otherwise.

these inlet fans can't be used with a speed adjuster to control the cfm either.
​
Click to expand...
You want the pressure in grow room to be negative. That allows you to control odors. You should always have more exhaust going out than air coming in. Your last example is wrong, it would be on the low side by 10 CFM.
 
mrboots

mrboots

Well-Known Member
I had a fan like that from home depot, now I have a computer fan and it works better and you can buy 8 of them for $30 instead of just one.
 
GibbsIt89

GibbsIt89

Well-Known Member
Serapis said:
You want the pressure in grow room to be negative. That allows you to control odors. You should always have more exhaust going out than air coming in. Your last example is wrong, it would be on the low side by 10 CFM.
Click to expand...

thank you! so now do you think i could get say 2 250cfm fans.. as inlet, one bringing in fresh air from the window into the veg room, then a second one exhausting the veg room into the flower room.. therefore the veg. room is neutral pressure and the flower room is negative if i use the 449cfm fan:
http://www.businesslights.com/vortex-inch-449-cfm-high-power-inline-fan-p-1444.html
 
GibbsIt89

GibbsIt89

Well-Known Member
or has it been declared that these "booster" fans just suck ass period unless u use them directly attached to a light hood to cool the light down.. i need them for inlets.. if i attached it to one of the lights it would only be the 400watt MH in the veg room. (1000watt HPS doesnt have a refletor hood with a duct hook up) either way im not sure if i really need hardcore inlet air becuz it will be really cold air (i live in canada, winters coming).. im mainly doing this to keep the smells out of the house or from ppl smelling it outside walking by/ or neighbours
 
jawbrodt

jawbrodt

Well-Known Member
^They'll work better for pulling in fresh air, than they will, for cooling lights. The less drag, the better, when it comes to those booster fans.
 
GibbsIt89

GibbsIt89

Well-Known Member
so will i burn the two 250cfm fans out quickly with the 449cfm exhausting? the exhaust fan is a good deal for $149

should i mayb go back to the 170cfm exhaust fan with filter combo for $120 and use two 80cfm fans for inlets?
 

Attachments

You must log in or register to reply here.
Top