Help with climate

My house has central AC and stays around 73 to 78 depending on season. I have a 12x12 bedroom with a 4x4 tent with 600W HPS. This bedroom also has 15k btu window AC to supplement my central ac. I want to passively intake from bedroom and exhaust into SAME bedroom. Ill add dehuey and CO2 if necessary. Main concern is temp. If sealed rooms maitain temp with 4k btu cooling per 1k light, is it feasible my 15k btu window ac will cool my tent exhaust fast enough? Kind of the same concept as sealed room of constantly heating a room up and battling it with AC except Ill be able to keep negative pressure on tent to scrub odor. Does any of this sound feasible?

It will depend on the size of your room but it should do. Are you planning on using filters on your intake and outtake to the tent.

mjinc said:

It will depend on the size of your room but it should do. Are you planning on using filters on your intake and outtake to the tent.

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The exhaust will start at a Can Filter. Ive considered rigging a filter for intake. Might not

Your window unit should keep up fine. Be sure to keep your ac filter clean, it makes a big difference!

Results are in. With outside temps over 90, my house central AC set at 77 and the window unit in lung room set at 70 the tent temp is steady 79F. I also experimented with lower temps. With house set at 74, lung room set at 68, inside of tent was steady 75F.
This is very exciting. Past grows have been ruined with hermies, no doubt due to temps and humidity.
Night time humidity is high in room even with no plants so Im planning on a 70 pint unit. Considering I can maintain under 80F without the AC even working hard, Im considering replacing my 600 with a 1000k watter in tent and co2 in lung room........Oh boy
Im not sure if the occasional dump of houses central AC will be enough to replenish co2. Sorry for long post. I guess ?s are
-How many degrees do you think a 1000 watt bulb will increase tent temp over 600 watt if everything is the same?
-Do you think occasional central AC blowing in lung room will provide sufficient co2?

TRF said:

My house has central AC and stays around 73 to 78 depending on season. I have a 12x12 bedroom with a 4x4 tent with 600W HPS. This bedroom also has 15k btu window AC to supplement my central ac. I want to passively intake from bedroom and exhaust into SAME bedroom. Ill add dehuey and CO2 if necessary. Main concern is temp. If sealed rooms maitain temp with 4k btu cooling per 1k light, is it feasible my 15k btu window ac will cool my tent exhaust fast enough? Kind of the same concept as sealed room of constantly heating a room up and battling it with AC except Ill be able to keep negative pressure on tent to scrub odor. Does any of this sound feasible?

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With only one 600 watt HPS light I really don't see you having any temp problems. If you're that concerned, just get an air cooled hood and a 720 cfm fan and you probably won't even need to run the AC that much. I'd recommend adding CO2 since you said it was an option, then 80-85 wouldn't be a problem for you and less money spent on the AC.

I have two 15k BTU window units in my sealed shed to cool 4400 watts, I think you'll be fine

TRF said:

Results are in. With outside temps over 90, my house central AC set at 77 and the window unit in lung room set at 70 the tent temp is steady 79F. I also experimented with lower temps. With house set at 74, lung room set at 68, inside of tent was steady 75F.
This is very exciting. Past grows have been ruined with hermies, no doubt due to temps and humidity.
Night time humidity is high in room even with no plants so Im planning on a 70 pint unit. Considering I can maintain under 80F without the AC even working hard, Im considering replacing my 600 with a 1000k watter in tent and co2 in lung room........Oh boy
Im not sure if the occasional dump of houses central AC will be enough to replenish co2. Sorry for long post. I guess ?s are
-How many degrees do you think a 1000 watt bulb will increase tent temp over 600 watt if everything is the same?
-Do you think occasional central AC blowing in lung room will provide sufficient co2?

Click to expand...

If you're getting the desired temps at 600 watts without stressing your AC, you should be just fine at 1000. People say 4k BTU cooling per 1000 watt, you can get away with a little less if your hoods are air cooled properly. But since you've got yourself a central AC in addition to a 15k BTU unit then I really don't see you having problems maintaining your temps.

In fact, if you can go with 1000 watts and CO2 then you definitely should. You may even end up getting close to doubling your yield by doing those two things, assuming you completely fill your 4x4 canopy. You want a minimum of 50 watts per square foot, a 600w will only give you 37.5w/sqft where as you'll be getting 62.5w/sqft with the 1000w. Supplement with CO2 and you'll be golden.

Thanks for replies guys. If I wasnt worried about the window AC leaking odor, Id ditch the tents completely and run a couple 1k open. I feel I have enough AC for it. Split unit is not an option right now and I like the fact I can keep negative pressure on tents to scrub odor. I am seriously considering 1k and co2 now. I exhaust tent 24/7 through scrubber so.
-Tank or Burner?
-Inside tent or out?