How Many BTU's per 1000 Watt Bulb?

[mello]

I'm trying to determine the BTU output of the equipment in my room while using Lumatek Digital Ballasts with Eye Hortilux 1000 W HPS bulbs.
According to Chillville's thread, digital ballasts only put out 2,500 BTU's. However, it seems like most places I look rate a 1000 watt bulb at 3,400 BTU's.

Can anyone confirm this lower rating for the digital setup? Don't wanna doubt on Chillville's skills, but I need to be absolutely certain before moving forward.

Big thanks.

 

[treebark1950]

I go by 6000btu of cooling per 1000w un aircooled.

I also mount ballast outside of the room.

 

[fishwhistle]

I go by 6000btu of cooling per 1000w un aircooled.

I also mount ballast outside of the room.

X2

 

[leadsled]

go up or down depends on the insulation of your room and the conditions where it is located.

I can see the 3400 being the bare minimum. I would not want my AC running at max the whole time. 4000 btu per 1k is what is recommended as a baseline. There is a calculator on the homepage of http://www.excelair.ca/
Always better to have more on hand than less imho. See how others went even higher on btu. Better safe than sorry, imho

 

[Landfishd]

I have always heard from growers to plan for 6000btu/non air cooled 1000 and I live in SoCal

 

[mello]

6000?!? I have a 48,000 BTU unit successfully cooling 10,600 watts with CO2. Then again, I'm in a much cooler environment then SoCal;)

 

[mello]

leadsled, thanks for that Excel link.

According to them, their 4 ton 48,000 BTU unit will cool 12 K, plus CO2.

All input here has been much appreciated!

 

[CannabisJohn]

I use 4000 btus/hr for properly air cooled lights and 6000 btus/hr for unvented lights. Some climates will allow somewhat less but never go below 4000 btus/ 1kw. I am an HVAC tech doing grow room installs in SoCal. My bottom line is if you want to take a chance and lose ur crop then go for it.

 

[CannabisJohn]

leadsled, thanks for that Excel link.

According to them, their 4 ton 48,000 BTU unit will cool 12 K, plus CO2.

All input here has been much appreciated!

Don't go by Excel unless your lights are properly air cooled because they don't take into account room construction and climate. I use the numbers I do to take into account room construction and additional equipment in room such as pumps and dehueys.

 

[mello]

Cannabisjohn, thanks for your input.

What would you suggest for 12 k, co2, 3 dehus, 360 sq ft room with 10 ft ceilings?
The room will be built to spec so I can use whatever insulation necessary. And I'm in the NW so climate is generally pretty cool.

Cheers!

 

[oregongreener]

I have a 4x4x6.5 tent in which I run a 1000watt HPS in a cool tube setup (w/ digital ballast). The light has its own intake and exhaust using a 270CFM booster fan (pulling ambient air from the bedroom through the hood to cool). The tent has a 6-in centrifugal fan rated at 470CFM pulling in air through a passive intake in the tent. The fan currently runs full-boar, but will get a speed control once I get the carbon air scrubber (to slow down the fan to improve odor removal). There is a tower-type oscillating fan in the tent to circulate air.

Here in OR it hits the 90's for about 2-3 weeks a year. I want to install a window A/C unit to cool the bedroom and ostensibly the tent itself. The exhaust from the tent AND the light will eventually dump out the window through a vent to the outside.

Should a 5000-btu unit cover my needs?

Right now, with daytime temps around 55-65 the tent hits as high as 80* with the HPS on and the light/tent exhausts dumping back into the bedroom (I just need about 8ft of 6-in tubing to finish the exhaust to the outside...).

Thanks!!!

greener

 

[Graywolf]

1000 watts equals 3412 BTU.

 

[outwest]

I use 4000 btus/hr for properly air cooled lights and 6000 btus/hr for unvented lights. Some climates will allow somewhat less but never go below 4000 btus/ 1kw. I am an HVAC tech doing grow room installs in SoCal. My bottom line is if you want to take a chance and lose ur crop then go for it.

Great rules of thumb. I'm using 7000btus for 1200w of air cooled light. Good to know. Thanks, CJ.

outwest

 

[CannabisJohn]

Cannabisjohn, thanks for your input.

What would you suggest for 12 k, co2, 3 dehus, 360 sq ft room with 10 ft ceilings?
The room will be built to spec so I can use whatever insulation necessary. And I'm in the NW so climate is generally pretty cool.

Cheers!

With your climate I would think no more than 60,000 btus (5 tons). If you air cool you would be able to reduce to 3.5 to 4 tons w/o problems.

 

[CannabisJohn]

I have a 4x4x6.5 tent in which I run a 1000watt HPS in a cool tube setup (w/ digital ballast). The light has its own intake and exhaust using a 270CFM booster fan (pulling ambient air from the bedroom through the hood to cool). The tent has a 6-in centrifugal fan rated at 470CFM pulling in air through a passive intake in the tent. The fan currently runs full-boar, but will get a speed control once I get the carbon air scrubber (to slow down the fan to improve odor removal). There is a tower-type oscillating fan in the tent to circulate air.

Here in OR it hits the 90's for about 2-3 weeks a year. I want to install a window A/C unit to cool the bedroom and ostensibly the tent itself. The exhaust from the tent AND the light will eventually dump out the window through a vent to the outside.

Should a 5000-btu unit cover my needs?

Right now, with daytime temps around 55-65 the tent hits as high as 80* with the HPS on and the light/tent exhausts dumping back into the bedroom (I just need about 8ft of 6-in tubing to finish the exhaust to the outside...).

Thanks!!!

greener

Should be close. Might go a little bigger to like 7000 btus

 

[CannabisJohn]

1000 watts equals 3412 BTU.

You are correct from engineering standpoint. But need more to cover room construction and other heat loads.

 

[oregongreener]

Should be close. Might go a little bigger to like 7000 btus

Thank you John! I really appreciate the direct and thorough feedback.

 

[linky]

I have 8 unvented (adjust a wings) 600's being cooled by a 24k mini split and it is having no problem so far, it was 100 degrees outside today.

 

[CannabisJohn]

I have 8 unvented (adjust a wings) 600's being cooled by a 24k mini split and it is having no problem so far, it was 100 degrees outside today.

That's 5000 btus/hr per 1 kw of light which falls right in the 4000-6000 btus/ kw I quote. Again all depends on climate and room construction. I would rather be safe than sorry.

 

[QuarterbackMo]

I say 5000 btu per 1000w to be on the safe side... thats what I go by and I use a co2 gen