u/Frosty_Somewhere893

Im looking to add approximately 9k btu of capacity to our main open concept living area, and was just wondering if c.o.p. would be better with the 9k aura or the 12k modulated down?

This will be to supplement a central 20kwh electric furnace/ac so its not crucial if it can't keep up completely but I want to be able to turn the main (expensive) system down a few degrees and maintain comfort in our main area.

Neither of these would short cycle in this space, probably not even the 18k but I was thinking of going on the smaller side for better dehumidification and because the 9k has a quite a bit higher seer rating.

Thanks for any suggestions