AC Direct - FAQ's - Sizing Your System - Ductless Heating and Cooling System
How do I size a ductless mini split?
This page is designed to provide anyone looking for a new HVAC system with a better understanding of frequently asked questions about the selection, AC and furnace sizing and other important considerations in making the best choices for your home or office.
This information guide offers the following categories of information pertaining to proper AC and heating system sizing as well as important guides to ensure you make informed decisions:
For cooling only use a factor of 20 BTUs per square foot for a well insulated home, 25 BTU's per square foot for homes of average insulation, and 30-35 BTU's per square foot for poorly insulated homes.