Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
No, it's one or the other. The heat pump is oversized by 1 ton (technically 15000 Btuh) in cold, dry climates and it is oversized by 30% (specifically for variable-speed systems) in other climates.
You can find some additional description of heat pump sizing in ResStock here.
