They say too much of a nice thing is bad, but this really is true, especially when it comes to HVAC.
I had this issue with a portable area furnace that I had bought.
I remember portable area furnaces to be pretty weak plus just enough to take the chill out of a room, but however, these modern portable area furnaces are not like that at all! As a matter of fact they are way too powerful if you ask me! I had the portable area furnace I bought in our bedroom to keep me warm while I was sleeping. A way to save money on running the central furnace. Well, I woke up feeling like I was going to die! It must have been over 100 degrees in the bedroom! This was with the portable furnace being on the lowest setting. I can not tell you how this shocked me. I ended up having to open up a window and let the cold outside air come into the bedroom for about 15 minutes to even somewhat cool it off enough for me to be in there. I returned the portable gas furnace to the store and told them that it worked too well and that I could not deal with risking giving myself a heat stroke. The store refunded me and decided to report this to the corporation that made the portable area gas furnace that I bought. They need to make some adjustments before shipping out any more of these portable area furnaces for sale. They could be deadly if one doesn’t guess this could happen!