Thinking about a 3-zone mini split for your home? A well-rated system with a...

https://extra-wiki.win/index.php/Do_I_Need_Backup_Heat_If_My_Mini_Split_Is_Rated_to_-13%C2%B0F%3F

Thinking about a 3-zone mini split for your home? A well-rated system with a SEER2 of 24 can keep three areas comfortable while saving energy, even in cold snaps down to -13°F