I could see you losing water weight with no AC, but losing fat 3x faster? I have skepticism.
Anyway, I'm in an AC'd place almost all the time and guess what... I iz skinnay! :awe:
I guess I should stay in an AC'd gym if I wanna gain weight and muscle mass? :awe:
How old are you Trident 16? Wait till you're 30, with years of ribs, inactivity, cubicles and cocktail nights behind you. That shit adds up indoors just piles on. if they were in 100F not problem.

Did you even read the article?
Oh I see your problem, you're a scrawnomorth (google ectomorthism)
You want mass quick? eat all the time even if you're not hungry. Never run.
when you hit gym you do no more than 4 reps 3sets per body part 4x3 is good. First rep you should be able to do alone, second little help, third rep lots of help, forth head turning beet red and arms shaking with spotter helping. repeat 3x. Very good spotter is key! Every lift should be like a max lift.
You'll put mass on, quick.
Think big muscle groups squats, dead lifts, bench etc - don't fuck with the small stuff like wrist curls or calves.