Sizing mini-split head for airflow
We’ve got a 1280sf (32×40) room above a garage, currently heated by a gas forced-air furnace and AC. The room is completely open (no dividing walls).
We’d like to add a heat pump to take care of the primary heating/cooling and keep the gas furnace/AC as backup.
I will do a Manual-J for the space, but I’m curious how do ensure that I have sufficient airflow? Can a single mini-split head cover that much space, or will we be forced to use multiple heads?
Thanks!
-jeff
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Replies
It depends on how well insulated and air tight the room is. I use a single head to heat my open concept 1200 sqft main floor with no issues.
Thanks. It's relatively recent construction and we recently added more blown-in fiberglass to the attic area.
Good to know a single head can take care of that floor space.