Efficient cooling for 2 x gavita 6/750 DE

Cwrighty9420

Cwrighty9420

Well-Known Member
Hey guys what size fans would you recommend for a 9 foot by 4.5 foot space with 8 foot high cielings

planning to use 2x6/750de gavitas running at full power for this one

intake and outtake recommendations please :)

I was thinking 10” out

6” in?
 
coreywebster

coreywebster

Well-Known Member
Cwrighty9420 said:
What would you use for in? 4? Or passive?
Click to expand...
If your going active intake then one step down, enough to be a bit less than your extraction once you've factored in your losses from duct and filter.
If you go too small your restricting it more than aiding it, but you do have extra passive vents to make up for it.

The way I would calculate the extraction would be watts x 3.16/ DT( temp rise from ambient in f)

So 1500w x 3.16 / 10f (aiming for 74.4f desired temp) = cfm

Which would give you 474cfm without losses.

Really you should add any other wattage , fans ect into that total wattage.
I would be adding 35% at least for duct loss and filter, depends on how many bends you have, type of duct.

I would always want more than less and ideally use a fan that's got a speed controller

Something like an 8" ac infinity should cover you.
Assuming your 18 degrees c is worst case ambient, otherwise use what ever ambient you get in summer time.

Personally I found in a 1.2x2.4 I didn't need an intake
 
Cwrighty9420

Cwrighty9420

Well-Known Member
coreywebster said:
If your going active intake then one step down, enough to be a bit less than your extraction once you've factored in your losses from duct and filter.
If you go too small your restricting it more than aiding it, but you do have extra passive vents to make up for it.

The way I would calculate the extraction would be watts x 3.16/ DT( temp rise from ambient in f)

So 1500w x 3.16 / 10f (aiming for 74.4f desired temp) = cfm

Which would give you 474cfm without losses.

Really you should add any other wattage , fans ect into that total wattage.
I would be adding 35% at least for duct loss and filter, depends on how many bends you have, type of duct.

I would always want more than less and ideally use a fan that's got a speed controller

Something like an 8" ac infinity should cover you.
Assuming your 18 degrees c is worst case ambient, otherwise use what ever ambient you get in summer time.

Personally I found in a 1.2x2.4 I didn't need an intake
Click to expand...
I’m still confused lol
 
Cwrighty9420

Cwrighty9420

Well-Known Member
coreywebster said:
If your going active intake then one step down, enough to be a bit less than your extraction once you've factored in your losses from duct and filter.
If you go too small your restricting it more than aiding it, but you do have extra passive vents to make up for it.

The way I would calculate the extraction would be watts x 3.16/ DT( temp rise from ambient in f)

So 1500w x 3.16 / 10f (aiming for 74.4f desired temp) = cfm

Which would give you 474cfm without losses.

Really you should add any other wattage , fans ect into that total wattage.
I would be adding 35% at least for duct loss and filter, depends on how many bends you have, type of duct.

I would always want more than less and ideally use a fan that's got a speed controller

Something like an 8" ac infinity should cover you.
Assuming your 18 degrees c is worst case ambient, otherwise use what ever ambient you get in summer time.

Personally I found in a 1.2x2.4 I didn't need an intake
Click to expand...
You think 6-8” passive will be ok

it’s a 9foot by 4.5foot room
 
coreywebster

coreywebster

Well-Known Member
Cwrighty9420 said:
You think 6-8” passive will be ok

it’s a 9foot by 4.5foot room
Click to expand...
Sorry thought you were in a tent with multiple passive intake options.
If its just a room then maybe go 8" extraction , 6" active intake, or a couple of 8" passives.
Normally there is plenty of air coming in and out of a room passively unless everythings sealed up, if you go passive then there's no harm in more volume.
 
Cwrighty9420

Cwrighty9420

Well-Known Member
coreywebster said:
Sorry thought you were in a tent with multiple passive intake options.
If its just a room then maybe go 8" extraction , 6" active intake, or a couple of 8" passives.
Normally there is plenty of air coming in and out of a room passively unless everythings sealed up, if you go passive then there's no harm in more volume.
Click to expand...
here’s a rough blueprint

it’s a large room sectioned into 2

each side has a 10”fan and filter

4” passive intake on each side currently

I plan to run 2 x 6/750de gavita in each side
So 4 in total

however altering on and off during 12/12 so when 1 room comes on the other goes off
 

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a mongo frog

a mongo frog

Well-Known Member
Cwrighty9420 said:
here’s a rough blueprint

it’s a large room sectioned into 2

each side has a 10”fan and filter

4” passive intake on each side currently

I plan to run 2 x 6/750de gavita in each side
So 4 in total

however altering on and off during 12/12 so when 1 room comes on the other goes off
Click to expand...
Do you have funds for 18k window a/c then get some bottled co2?
 
Cwrighty9420

Cwrighty9420

Well-Known Member
a mongo frog said:
Do you have funds for 18k window a/c then get some bottled co2?
Click to expand...
I could get the ac but it would look to suspicious to neighbours it’s not an area where people tend to have or be able to afford ac lol I could get co2 in each room no problem and perhaps a standing ac unit for inside the rooms?
 
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