I'm trying to cut down on the use of my airconditioning as much as I can.
I'm trying to use my AC as litlle as possible.
ーI'm trying to cut down on the use of my air conditioning as much as I can.
「エアコンの使用をできるだけ控えるようにしている」
to cut down on the use of ... で「…の使用を減らす・削減する」
as much as I can で「できる限り」
ーI'm trying to use my AC as litlle as possible.
「エアコンをなるべく使わないようにしている」
as little as possible で「できるだけ少なく」
ご参考まで！
カナダ 
