Hobby Greenhouse Ventilation Fan

This is our first winter with our small green house. At night, the temperature will go down to the outside temperature (We haven't added heat yet). But during a sunny day, it can be 120F inside! Even when it is only 10F outside. As we are getting ready to start our seeds, I built a temp/pressure/humidity/Lux sensor to log the Greenhouse climate. We have manual ceiling vents, but we decided to add an automated gable fan and a fresh air vent. Since most small vents are for exhausting air, I designed / 3D printed an input louver vent.
The 3D print files are located:
www.prusaprint...
We used the following:
12 inch thermostat controlled louver fan ( amzn.to/3kmiQQM )
9'x12' Greenhouse ( amzn.to/36paYqy , www.farmtek.co... )
Steel base ( www.farmtek.co... )
There are several other brand greenhouses that have gotten reasonable reviews:
Palram HG5612 Glory Greenhouse, 8' x 12', Gray ( amzn.to/2TBjIER )
Rion EcoGrow 2 Twin Wall Greenhouse, 6' x 12' ( amzn.to/2XrHHHJ )
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