When you have rooms in the house that are not in use.
This is something I’ve seen in a rented house where someone was using the garage for a podcast studio.
He portioned off part of a single car garage to set up his equipment and built a makeshift studio. Since this was a rented house and he didn’t plan on living there forever, he converted the garage in a way that he could take it apart whenever he decided to move.
The problem was that there wasn’t any heating or air in the garage and it was extra hot throughout the summer.
And by no means is this a recommendation, I’m only telling the story to give you an idea of things that can be done if you think outside of the box.
In this specific rental house that he lived in, there was an area next to the garage that was supposed to be a dining room (maybe). The room didn’t make a lot of sense and he was just piling stuff in there.
So to cool his studio area that he had built into his garage, he got into the attic, removed the duct that was running to the dining /storage room he wasn’t using, and extended it to the garage.
A pretty good solution since he had a room that was only being used for storing stuff.
This was a good idea for him since he was a single man and wasn’t using one room for anything besides storage and didn’t care whether or not it ever got cooling or heating to it.
This idea can also work if you have a house with a room or two that you keep closed off but do not want to completely remove the heat or air from the room
In the above scenario, the man could have tied into the existing ductwork and ran a new duct to the garage.
Then added vents that could be completely closed to both the dining area and the new garage area.
That way both rooms could share the Heat and Air in an either/or situation.
I say either/ or situation because simply tying off a new duct from an existing room will probably not give you enough air into the new room for you to be satisfied.