Greenhouse build questions

[Bayard]

I use an evaporative cooler in summer here in NJ. That plus a fogger and 50% Aluminet shade keeps temps below 90F on the hottest days. I used to use this window unit with good results: CHAMPION WCM28 EVAPORATIVE COOLER, 400 - 600 SQ-FT, 2800 CFM.
If you can, go up to five wall polycarbonate to save on heat and go bigger. A larger air mass is more stable as far as temperature swings, especially with heating. Besides, you’ll run out of room fast!

[orion141]

Originally Posted by Bayard

I use an evaporative cooler in summer here in NJ. That plus a fogger and 50% Aluminet shade keeps temps below 90F on the hottest days. I used to use this window unit with good results: CHAMPION WCM28 EVAPORATIVE COOLER, 400 - 600 SQ-FT, 2800 CFM.
If you can, go up to five wall polycarbonate to save on heat and go bigger. A larger air mass is more stable as far as temperature swings, especially with heating. Besides, you’ll run out of room fast!

Hi Bayard, thanks for the link to the evaporative cooler. How did you have your greenhouse set up with regards to automatic temperature control? Can this evaporative cooler be configured to run in fan only mode as well as evaporative cooler mode? I was thinking of having the exhaust fan and fan only mode of the evaporative cooler kick in at some temperature around 77-80 and then if it can't maintain the temperature to below 83-84 have the evaporative cooling portion of the swamp cooler kick on. Not sure if this is feasible?

As general question to everyone who has replied so far. Have you all found that the exhaust needs to be run even in the cold portions of winter for air exchange? Or will passive air exchange due to gaps/cracks in combination with internal circulation be sufficient to prevent mold/fungus/etc?

thanks!