Heating my grow shed

I bought a ceramic heater for $18. I also added a 6" exhaust with a fan, and bought a timer for the light, and some insulation for the door and crevices. Next I am gonna build a carbon Scrubber to keep the thieves away, and buy a fan somewhere. No retail stores seem to sell them this time of year.

How far into flowering do the plants start to smell? I am outta funds now, and hope it wont be for a few weeks. I just put them, on 12/12 yesterday.

This ceramic heater has a cheap thermostat. I am gonna have to buy a temp controlled outlet to plug it into.