ventilation

[pecker88]

Starting in late Nov. I used wiggle wire / c channel to secure the roll up sides to the bottom boards on either side of the high tunnel. I also insulated around the inside perimeter using 1.5" rigid Styrofoam, spray foam, ect... It's pretty air tight and I've noticed the humidity lately; most of the time it's around 100%

I also added power and a 55K BTU non-vented propane heater.

Nothing is planted yet, but I'm wanting to start my first tomatoes around 15 March. Daily temps with everything closed are commonly 80-110 degrees on a sunny 20 deg. F day.

My question is ventilation. I'd like to invest in either:
1. automatic roll up sides (I wrote an app that I could control them with my phone)
2. Ventilation fan with motor powered intake vents

Which would be the better bet? It seems like either option would fight/contend with the heater. Meaning, when the heater is on, the ventilation would draw the heat out?
Heater is mounted just above the door in below pic.

thanks.