Hi, I am planning to install bathroom ventilators on existing ventilation grilles. How much degrees temperature will the appartment goes down, if I install electric ventilators? (where all flat rooms facing sun all day very bad air circulation like a greenhouse, stay near 30°c even all the night, no heater needed in Winter but hell in Summer). My place is on corner house facing all day sunlight front of open space, a square with 5 streets passing (noisy trafic also night).

4 very tall windows from room roof to floor, is too much surfaces to cover costs for install shutters?

all 4 windows are facing same directions,

whereas 2 ventilate holes are positioned highest near floor roof, behind back of the house,

-1 is in bathroom passing behind heated sleeping room,

-the other in toilet room next to entrance, passing behind heated living room.

when open entrance door, cool air circulate, if not opened, bad circulation even all windows opened,

sadly cannot leave entrance door open all night for security reason.

also note that both ventilate holes show bad air circulation, we measured by devices,

therefore, thinking of forcing air out by electric ventilators,

if this solution cooling down room temp enough?

Since the bedroom is most important to cool down is a suncreen only to this one room-window enough by keeping closing this room door well? is it ok for no shutters for other 3 windows (in living room and kitchen)?

-for releasing airco heated air out, what are other solutions, since it is not allowed to make big hole for pipe/hose out of the wall?

-which is most efficient and how much these 4 comparaison pricewise : shutter, or sunscreens, or water cooling machine(I have), or airco?

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