I don't have a grand to spend on a mini split right now I can get a 12000 btu ac for 280 if that would help. Any other things I could do?
Find your total power displacement in the room(fans, air pumps, lights, phone charger, everything that uses electricity) and multiply that number by 3.41, then add 10%. This will give you a rough estimate as to how many BTU's you're producing that need to be removed by the AC. Always aim for a slightly bigger AC than you need. Oversized AC's don't have to work as hard to cool a space which tends to be more efficient than a smaller AC struggling to keep up.
You would need an 18k btu minimum for the 4kw room, and a 10k BTU AC for the 2kw room.
If you don't plan on moving locations for some time, a dual zone mini-split is your best option.
Then end all fix is to begin your change to LED lights. I was skeptical by dont belive what ne one say they are amazing especially my KIND K5 1000w. They significantly reduce heat and issues of temperature. And cost less in total usage.
But for now you can try giving each light its own ventaltion channel. And run any fans high becausr of course heat rises.
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Thermal energy is the result of work being done in a space, AKA electricity moving through circuits. 1000w of power displacement is going to result in ~3410 BTU being displaced in the space regardless of it's from an HID lamp, a 65% efficient LED COB, or a toaster oven.
LED's do not 'run cooler' than HID lamps. This is a an age old myth perpetuated by unscrupulous vendors peddling bottom bin LED panels.Preying on the fact that most individuals didn't take(or didn't retain) physics.
The only way to reduce ambient temperatures with an LED compared to HID is to use a more efficient chip to reduce the overall powerdisplacement while maintaining the photon density and count. Using kind LED panels with their bottom bin epi star LED's is not going to accomplish that.