Grow room temp

Chippers

New Member
Hi,
Ok so I'm starting my proper grow tent grow in September hopefully and I'm just getting my last bits together. I've got some questions though, if you can help me?

1) If I'm venting outside how do I stop my temp from dropping what with having the window open?
2) HPS or LEDS? I've both. I'm worried about the heat signature from HPS, electricity cost and fire risk.
3) Humidifier/ dehumidifier can anyone recommend any that aren't going to break the bank?

Thanks
 
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