Sigarms
Super Member
That's the funny thing. Here in NC, my design load for outside air temp would be a maximum of 20F outside air. When you go west of Raleigh NC, it can get much colder during the winter time (I'm about 1.45 hours west).@Sigarms, thanks for the details. An OAT of 30F is as cold as we are likely to see. Maybe 25F once every fifty years.
I had been concerned about freezing my cold sensitive spouse...
All the best,
Peter
The bugger is most mini split manufacturers I know don't give you the total capacity at 30F OAT, but more at 17F or 23F OAT.
Please note, that 3F OAT was taken in Boone NC on December 23rd, 2022. Elevation 3,300 ft.
Any decent HVAC guy should explain what and why they are pricing what they are to you. Generally you always want to error on the side of caution when it comes to heating loads.
So in your case, I'd go 23F OAT.