New grow space heating

I was able to get ahold of a 25x25ish garage. The unit does not have heat, nor a/c. Winter is coming fast and Im looking for options that would work, excluding space heaters ect.

Were planning on making about a 15x20 room in the garage, not 100 percent sure on the dimensions. It will be a sealed room with around 6-8 lights. We will have a large mini split installed by the summer.

The grow will likely be hand watered coco.

What has worked for you? Anyone suggestions would be great.

jkwrestling13 said:

I was able to get ahold of a 25x25ish garage. The unit does not have heat, nor a/c. Winter is coming fast and Im looking for options that would work, excluding space heaters ect.

Were planning on making about a 15x20 room in the garage, not 100 percent sure on the dimensions. It will be a sealed room with around 6-8 lights. We will have a large mini split installed by the summer.

The grow will likely be hand watered coco.

What has worked for you? Anyone suggestions would be great.

Click to expand...

When buying a mini split...always go the extra mile and buy the HeatPump version.

I live in the mountains where winters are very cold some years. Use of house central heating for time when lights are off. Exhaust - 9 inch ball bearing fan hooked up to a day/night thermostat to keep heat from frying plants. Look for well made wall mount fans for circulation. Check into lifters or risters that you can pick up for 10 bucks (works like a pully) a pair for attaching to light hoods - Very nice to raise and lower lights instead of chains.

fandango said:

When buying a mini split...always go the extra mile and buy the HeatPump version.

Click to expand...

I don't know about heat pump versions of minisplits?

However, getting a heat pump could be smart, depending on its capabilities.

One trick that will help guarantee you don't need additional heating and the attendant expense is to run two bloom rooms on a flip schedule. Ventilate each one into the other and there will be no time when your garage isn't toasty warm.

ttystikk said:

I don't know about heat pump versions of minisplits?

However, getting a heat pump could be smart, depending on its capabilities.

One trick that will help guarantee you don't need additional heating and the attendant expense is to run two bloom rooms on a flip schedule. Ventilate each one into the other and there will be no time when your garage isn't toasty warm.

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That is a fantastic Idea. The only problem I see there is the co2...I would like to have each room sealed with co2 if possible.

fandango said:

When buying a mini split...always go the extra mile and buy the HeatPump version.

Click to expand...

How much would it cost to run a heat pump in that big of a room? I was under the impression that the heat pumps suck up energy.

jkwrestling13 said:

That is a fantastic Idea. The only problem I see there is the co2...I would like to have each room sealed with co2 if possible.

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So seal them as one, together. Add CO² and let it circulate between them in the air.

ttystikk said:

So seal them as one, together. Add CO² and let it circulate between them in the air.

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This could be what I go with. Mini split in each room with heat pump, 4k rooms. Keep my res outside the rooms in the winter so no need for the chiller. Two exhausts running into each room constantly. Each room with a co2 regulator and tank. Possibly 2 10x10, 4k watt rooms.

Would the sleeping plants be disturbed by high co2 levels?

Sleeping plants actually emit CO², and since you're running both rooms as one effective space, you'll only need one regulator and CO² tank setup.

Run just one minisplit with two remotes, one for each room. Then it can cool the room that needs cooling, when it needs it. Since you're not running the rooms simultaneously, you only need enough capacity for one room.

Voilá! I just saved you half your startup cost in environmental control equipment!

ttystikk said:

Sleeping plants actually emit CO², and since you're running both rooms as one effective space, you'll only need one regulator and CO² tank setup.

Run just one minisplit with two remotes, one for each room. Then it can cool the room that needs cooling, when it needs it. Since you're not running the rooms simultaneously, you only need enough capacity for one room.

Voilá! I just saved you half your startup cost in environmental control equipment!

Click to expand...

Okay, so i would have a split in one room you're saying? Then the thermostat measures the temp and kicks on, no matter which room its in it will cool the room off once the air mixes?

And once its been running for an hour or so, both rooms should have extremely similar co2 levels, rh levels, and temps.
As long as there is good airflow in each room. 2 osculating wall mount fans per room

I see this turning out great.

jkwrestling13 said:

Okay, so i would have a split in one room you're saying? Then the thermostat measures the temp and kicks on, no matter which room its in it will cool the room off once the air mixes?

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Not quite. A minisplit is an air conditioner that sends the Freon to a remote unit inside your growroom, where it absorbs the excess heat you're trying to get rid of. What I'm suggesting is that you get a minisplit unit with at least two remotes, so the minisplit can cool both rooms as needed. The minisplit itself needs to be somewhere it can reject a bunch of heat.

ttystikk said:

Not quite. A minisplit is an air conditioner that sends the Freon to a remote unit inside your growroom, where it absorbs the excess heat you're trying to get rid of. What I'm suggesting is that you get a minisplit unit with at least two remotes, so the minisplit can cool both rooms as needed. The minisplit itself needs to be somewhere it can reject a bunch of heat.

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So such as a multi zone mini split? One compressor outside which connect to both rooms?

jkwrestling13 said:

So such as a multi zone mini split? One compressor outside which connect to both rooms?

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Exactly. If you can afford it, a third zone could even help control temperature in your veg room.

ttystikk said:

Exactly. If you can afford it, a third zone could even help control temperature in your veg room.

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Veg room I was planning on putting inside. I could afford it by the end of winter. I shouldnt need it at all in the winter being in michigan. But I could possibly even seal the veg room to both rooms, and add an exhaust to each room so they are all sealed and regulated together. If the veg area is small, a third zone may not even be necessary. What btu do you think I would need? Im not quite sure how the multi-zones work. Likely, there will only be one zone ever running.

jkwrestling13 said:

I was able to get ahold of a 25x25ish garage. The unit does not have heat, nor a/c. Winter is coming fast and Im looking for options that would work, excluding space heaters ect.

Were planning on making about a 15x20 room in the garage, not 100 percent sure on the dimensions. It will be a sealed room with around 6-8 lights. We will have a large mini split installed by the summer.

The grow will likely be hand watered coco.

What has worked for you? Anyone suggestions would be great.

Click to expand...

2 or 3 oil heaters what i have used for years if u are gunna have a inclosed grow space they work well i use 1 for a 2x2 grow tent veg and 2 for a 4x4 flower tent works well and never worry about fires as they don't burn shit u dry towls ans stuff on them

jkwrestling13 said:

How much would it cost to run a heat pump in that big of a room? I was under the impression that the heat pumps suck up energy.

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In the heating mode it is the same as running in the cooling mode,but with lights off the temp can be set in the 60's to save some voltage.

If you insulate your room well, and dont exhaust after lights out, run a dehumidifier at night, you won't need a heater.

You might get a humidity spike this way though after lights out.

But anyways, if your going to use co2 I assume your going to exhaust during or slightly after lights out.

- Jiji

I always wanted to know more about propane heaters. Supposed to produce CO2 and heat, would this be a bad idea? I live in the desert region and it would not make sense for me to use burners.

I do not like linking rooms together as stated. Your pumping co2 into a room with no lights on degrading trichromes drastically. Sealed rooms have co2 and O2 dumps for this exact reason.

Your going to need 24k per 4000 watts. They do not make a 48k dual head mini split(shit they don't make a 48k single head mini split), so unfortunately that idea will not work.

Also here is another thing to think about. If you link your rooms like stated an on gets spider mites or a diseases, hey guess what, it's now spread to your other bloom room.

Keep the rooms seperate. The advised plan is putting all your eggs into one basket, any one who's knows large scale knows that isn't a good idea at all. Put redundancy into your equipment, so if one piece fails something else will keep that in check until you can fix it. I put 2 ac units in all my rooms for that exact reason. If one dies on me, the other can hold it down until its fixed.