It becomes cool here, just from the wind that comes from the next room's air conditioner.
"It becomes cool here"=「ここは涼しくなる」
"just from the wind"=「ただの風で」
"that comes from the next room's air conditioner."=「隣の部屋のクーラーから来るので」
追加:"I can somehow survive without turning on the air conditioner in this room."=「この部屋のクーラーを付けなくても、何とか大丈夫です。」