Air Conditioning Help 20,000 Watt Setup

S

silvermt84

Member
Hi follks,

I'm going to be embarking on a new project next month and was hoping I could get some help.

I've got a 30x30ft shop that i'm going to be utilizing for my garden.

I'll be running 18 1000w bulbs/ballast (digital lumateks) I'm air-cooled hoods all at the same time.

My question is this:

How big of an A/C unit do I need to properly keep my gardens temperatures where they need to be.
Note* I live in the NW and summers can reach 100 degrees.

Any recommendations on what type of unit/brand would also be greatly appreciated.

Thank you very much for your time and consideration in advance.

-Farmer Brown
 
skunkd0c

skunkd0c

Well-Known Member
a very big one
even bigger than pinocchio's nose
perhaps you should consider water cooling since it is much more efficient than air cooling
you are going to have a huge electricity bill, are you planing on running some generators, or perhaps a wind turbine if you have the right
conditions, i hope you are not stealing power
food for thought

peace :)
 
S

silvermt84

Member
Stealing power is for thieves and idiots =) This power will obtained legitimately through our local provider.

Additonal input is welcomed and appreciated.
 
Rancho Cucamonga

Rancho Cucamonga

Active Member
Each 1,000 watt HPS light in a CO2 room requires about 3,500 BTUs of cooling to maintain target temps of 78F. In a non-CO2 grow room, growers need about 2,800 BTUs of cooling capacity.

Here you go:

http://www.discount-hydro.com/products/KwiKool-Portable-Air-Conditioner-Water-Cooled-5-Ton.html

Make sure whatever unit you buy can do 60,000 btu/hr. With 18-1,000 watters that's a needed 2,800 btu/hr. x18=50,400 btu/hr.

Very very spendy being you burn about 5 gallons of water every minute. If you have a pool or something large of that nature you can re-circulate the water. You would need to read up on that one as all of this is handed down info, I have no experience with any of this cooling.
 
S

silvermt84

Member
Rancho Cucamonga said:
Each 1,000 watt HPS light in a CO2 room requires about 3,500 BTUs of cooling to maintain target temps of 78F. In a non-CO2 grow room, growers need about 2,800 BTUs of cooling capacity.

Here you go:

http://www.discount-hydro.com/products/KwiKool-Portable-Air-Conditioner-Water-Cooled-5-Ton.html

Make sure whatever unit you buy can do 60,000 btu/hr. With 18-1,000 watters that's a needed 2,800 btu/hr. x18=50,400 btu/hr.

Very very spendy being you burn about 5 gallons of water every minute. If you have a pool or something large of that nature you can re-circulate the water. You would need to read up on that one as all of this is handed down info, I have no experience with any of this cooling.
Click to expand...

Thank you for the info. I'll be running C02 as well. Thanks for giving me a break down both ways.
 
Nizza

Nizza

Well-Known Member
also account for room size. use an AC load calculator for this. also if your planning on running ducting know about plunum sizings and what to u use for the static loads using a duct calculator
 
Nizza

Nizza

Well-Known Member
load calc: http://www.northernac.com/newcalc.htm
duct calc:http://www.harvelduct.com/air-duct-size-calculator
edit: i work doing a/c and i think the mr.slim is the best unit. maybe not big enough for that grow... maybe consider cool tube system on a seperate loop? that would make the btu output of your lamps go down and possibly save you from getting a huge unit, just utilizing outside air to cool the lamps. but then u need to be sure they arent condensating from the temperature difference so, that may not be a good idea. I like the ductable ductless mini splits, but they go up to 4x 9000k btu units per evaporator, and can also be upgraded to a heat pump system for not too much extra. just sayin
 
Nizza

Nizza

Well-Known Member
Rancho Cucamonga said:
Each 1,000 watt HPS light in a CO2 room requires about 3,500 BTUs of cooling to maintain target temps of 78F. In a non-CO2 grow room, growers need about 2,800 BTUs of cooling capacity.

Here you go:

http://www.discount-hydro.com/products/KwiKool-Portable-Air-Conditioner-Water-Cooled-5-Ton.html

Make sure whatever unit you buy can do 60,000 btu/hr. With 18-1,000 watters that's a needed 2,800 btu/hr. x18=50,400 btu/hr.

Very very spendy being you burn about 5 gallons of water every minute. If you have a pool or something large of that nature you can re-circulate the water. You would need to read up on that one as all of this is handed down info, I have no experience with any of this cooling.
Click to expand...
wow thats pretty frickin sick ive never seen one of those. i think with so many lamps though it would be good to have ducting
 
skunkd0c

skunkd0c

Well-Known Member
Rancho Cucamonga said:
Each 1,000 watt HPS light in a CO2 room requires about 3,500 BTUs of cooling to maintain target temps of 78F. In a non-CO2 grow room, growers need about 2,800 BTUs of cooling capacity.

Here you go:

http://www.discount-hydro.com/products/KwiKool-Portable-Air-Conditioner-Water-Cooled-5-Ton.html

Make sure whatever unit you buy can do 60,000 btu/hr. With 18-1,000 watters that's a needed 2,800 btu/hr. x18=50,400 btu/hr.

Very very spendy being you burn about 5 gallons of water every minute. If you have a pool or something large of that nature you can re-circulate the water. You would need to read up on that one as all of this is handed down info, I have no experience with any of this cooling.
Click to expand...

78f is a low target temp for a co2 enriched grow try 90f
 
R

ricky6991

Well-Known Member
90* ??? Your nuts... your right on highest temp that might be safe. More like 84-87 tops IMO. 90* is hot as hell.
 
jrainman

jrainman

Active Member
On this build you will be over the 60,000 BTU mark your about 5 1/2 - 6 ton of A/C So to stay with residental equipment you will need to install Two 3 tons A/C systems or go to a commercial package unit /AKA Roof top unit ,but it would be more benefical in your case to go with Two 3 tons split systems ,Just because you wull not always need all 6 tons to provide cooling ,and less stress on equipment in general,also you will move the air faster across 2 evap coils verse one evap coil therefore not pulling all the humidity out of the air as A/C does, If I was doing this install I would reccomend ordering the 3 ton blowers (air handlers) with what is call 5 ton drive blower motors , the quicker you move the air across a evap coil will intern not be as harsh on the humidty level icompared to using 3 ton drive 1400 cfm vs 5 ton drive at 2000 CFM.
 
Merkin Donor

Merkin Donor

Well-Known Member
jrainman said:
On this build you will be over the 60,000 BTU mark your about 5 1/2 - 6 ton of A/C So to stay with residental equipment you will need to install Two 3 tons A/C systems or go to a commercial package unit /AKA Roof top unit ,but it would be more benefical in your case to go with Two 3 tons split systems ,Just because you wull not always need all 6 tons to provide cooling ,and less stress on equipment in general,also you will move the air faster across 2 evap coils verse one evap coil therefore not pulling all the humidity out of the air as A/C does, If I was doing this install I would reccomend ordering the 3 ton blowers (air handlers) with what is call 5 ton drive blower motors , the quicker you move the air across a evap coil will intern not be as harsh on the humidty level icompared to using 3 ton drive 1400 cfm vs 5 ton drive at 2000 CFM.
Click to expand...
This^^^ Except I'd probably do (2) 2 1/2ton heat pumps with 4 ton FAU's with adjustable TXV's. Get the subcool dead nuts on and you will get another 5-6k btu's for free from each system. I'd also play with the fan speed (depending on his %RH) because you cut way back on the need for a dehumidifier in higher RH environments if you let it pull the latent heat out by slowing it down.
 
You must log in or register to reply here.
Top