Heat pump tool
Mini-Split Zone Planner
Plan rough mini-split indoor head sizes from room square footage using a clearly labeled rule of thumb.
Screening estimate only.A professional Manual J load calculation is authoritative for final heat-pump sizing and equipment selection.
Screening result
Fine Print and Sources
Screening estimate only. These tools use only the values you enter and simple planning math. A professional Manual J load calculation is authoritative for equipment sizing, room loads, and final purchase decisions.
The 25 BTU per sq ft factor used here is a common screening rule of thumb for planning. It is not cited to a fetched source. Indoor heads should be sized from room-by-room loads.
- EnergySage heat pump sizing guide: cites 1 ton as 12,000 BTU/h, explains why per-square-foot shortcuts are unreliable, and describes Manual J as the reliable sizing method.