New Grower Venting a small area

[SHRED]

35 cu ft.

I'll have a Mars Hydro 2 900w LED that will be adding some heat. I'm running 4" ducting.

I'm wondering how much air exchange I'll need. My fresh air intake temp will probably be in the mid 50Fto mid 70F this time of year. My garage.

Not knowing how much heat this light will generate I'm not sure how to time the exhaust blower.

On a timer? On a thermostatically controlled switch?

I'm thinking full time may chill the babies too much.

 

[BRICH999]

I have a mars II 700 and the heat it generates is very little. Without an exhaust in my area, im still running a heater constantly with another big t5 also adding heat. If you need air exchange right now i cant imagine it woukd be much

 

[illbethere]

All depends on how you place your lights, intake, etc..
placing something a little different can sometimes mean a 10°c difference and sometimes it's exactly the same.

When it comes to heat and ventilation I always say let it run for an hour and see what it tells you!