Night time ventilation

Im leaving the side vent open at the moment over night, but there's a lot of condensation on the glass in the mornings. The autovent is obviously closing itself but I'm thinking about leaving the door and other window open to improve air flow. Is anyone leaving things open at night if so how are you keeping the 4 legged wildlife out ?

For the last week or so we've been leaving the doors completely open on the greenhouses.
One house doesn't have an autovent (self built by previous occupants) and the other only has a roof vent.
As a result, on sunny days both can be 40+ by 9am .... far too hot!

I use a sheet of plastic coated metal netting over the door day and night and wedge it in place with the dustbin I use to store compost in.  I've also used a bag of compost standing on its end before now.

Its a solid piece of stuff that stands upright on its own without needing to be fixed, not the stuff you can buy on a roll. 

At the moment, I leaving the door wide open at night.  The mesh is big enough to let the bees in and out, but keeps cats and the foxes out.  I'm sure mice could get in, but had no trouble with them 

Auto-opener does the window, I do the door when I remember, although when it's as warm as this night and day it's mostly wide open all the time.

Lots of cats round here but they always have that shifty air when in my garden as if they know they're 'trespassing', probably because some local people don't tolerate them as readily as I do! 

For that reason I'd be surprised if one risked going into the greenhouse, which is almost next to the house, and I can't really imagine what damage it might do if it did, although I expect someone is about to put me well and truly in the picture on that score! 

My greenhouse hasn't been closed for about 4 weeks now. Vents constantly open and window on autovent perma-open.

I did make the mistake of installing vent and window over each other though.

both my doors have been open over night in my poly tunnel for months now. they have to be open overnight early in the season as i work odd shifts and it's cold when i get in and scorching by time i get up.

i do have trouble with cats, i will try and sort a similar grid or netting as mentioned above for next year.

I do the same as beesrus and it works for me. All my plants for outside have been  hardened off so all I have in there are sweet corn, dwarf and climbing French beans and some tagetes for whitefly.