Fresh air?? Outside 100+

Hello friends i am just about to start my new grow and have a couple questions.. I am in a very hot area of the world like the title says 100 degree air.. so my question is how necessary is fresh air, i personally believe you should always have it but when its this hot. it would be counter active to keeping temps around 80-85 with co2 etc please help any thing would be amazing thank you.

plz help really need input

100+ is too hot for them....

us an ac too cool the air or draw air in from inside the house that is cooler than the outside

ok thats was an idea to draw from the house but maybe my question wasnt clearly expressed. will eliminating fresh air decrease/hinder my plant growth?

Yes it will fuck your plants. As said earlier its the air temp your pulling into the op that is crucial, must be 75-80 so get an ac.Blow the hot used air outside the grow room and surrounding area. The co2 will not control temps bro.