grow box question

How would you go about maintaining temperature in a smaller grow box...like the size of a bc bloom box...It seems to me with good (needed) ventilation that you won't be able to control the temp inside much..because of all the air flow in and out...does the outer room temp matter alot?

What about humidity control how necessary is it??

In my experience...heat in a smaller area has to be moved way faster by using a bigger fan. If heat is an issue maybe try Co2. But to answer your questioin yes the ambient or outside temp does matter a lot since you are bringing that outside air into the tent