Which humidifier for a 3x3 tent..???

I dont know if this is the right place for this thread and question..admin please move post to another forum etc...

As the header suggests ..I am wanting to buy a humidifier, and ultimatley one with a steam volume control, timer and auto shut off when the res runs dry..!?

Ive just seen though that some project cool steam, others warm steam..and some that do both...

My question is In Veg, what do our girls prefer cool or warm water vapor. ???

and also do you have any reccomendations..???

Many thanks in advance - FS/STELTHY

Also.. Is there such thing as a humidifier that also releases Co2..??? - FS/STELTHY

For me it depends..,summer I use my cool.. winter I use my warm..trying to grow year round changes my environmental needs..