Can anyone check this out? http://forum.grasscity.com/grow-room-design-setup/707419-help-ventilation-temps-please.html
i have the same problem my room with hps on is aboout 85 F/ 30 c this is what im doing buying a cheap aircon unit that is rated at .5 kw and buying .5 kw of solar cells and making a solar panel to run the ac during the day solar cells can be baught CHEAP from alibaba.com 1 dollar per watt or 50 cents per watt for b grade cells