DrJynx86answered grow question 4 years ago You can start with some small turbine like fans taking out hot air, or "cool tubes", but really that's only moving heat from one room to another.
If you really want to lower the tems you need to:
1) Invest in air conditioning, the only real way to cool and exhaust heat from your room.
2) Invest in more efficient lights that produce more lumen/par and less heat.
Happy smokes!