Best time to take off the insulating cover from the windows in my coop?

[Chiko]

I just want to know everybody's opinions about what time of the year to take off the cover on my coop's windows. I've had it covering them all winter, and it's kind of warming up, but gradually. I live in Utah. So what would be the best time to take it off and let the fresh air into the coop again?

 

[countrygoddess]

I live in Vermont and I usually take the plastic off when the night time temps are consistently in the high 30's/low 40's.

 

[JackE]

As fresh air is important YEAR round. The front of my coop is open year round. When the night temps are consistently over 40F, I'll open up the side and upper windows. In the summer, the main door will be hooked open.
Jack

 

[1muttsfan]

X2, I never seal my windows as the fresh air seeping in is important to prevent moisture build up and stale air. I leave one window at least cracked open all year round.

 

[Chiko]

Thank you so much for the tips! I feel terrible now, Mine's been sealed all winter! Poor things, but I'll be sure to never fully seal it again. Thank's a lot!