Cooling BTU requirements for dehumidifier

I know the rule for lighting is 3.4 btus AC cooling per watt of light (and from what I've been told regardless of the type of light).

But does anybody know what the requirements are for dehumidifiers?

I know of course they aren't on all the time, but the AC still needs to compete with the heat from the dehumidifier. This is for a closed room with CO2

Evan879 said:

But does anybody know what the requirements are for dehumidifiers?

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A dehumidifier has a BTU/hr rating, you can get there'ish with HP numbers or wattage even. A lot depends on how much it runs. Some of the high end dehu's can have the condenser coil placed outside to eliminate the heat, actually provide some cooling but this can be bad during lights out unless you have a means of heat.

What type of lights and how many are you using? That 3.42 figure never really works out and is kind of hard to figure, leading to undersized AC.

Apalchen said:

What type of lights and how many are you using? That 3.42 figure never really works out and is kind of hard to figure, leading to undersized AC.

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Second this. I went with an 18,000 BTU A/C and running 4kw of lights + dehumidification it can't keep up. I run a Quest 70 and a home style 50 litre dehumidifier, and get about 100 litres every 24 hours which I recycle to use as feed water.

Wish I went with a 7.2kw A/C instead of a 5kw...

Them fancy Quest dehums with the external compressor aren't available here in Straya.