A 3-zone DIY mini split lets you tailor heating and cooling across multiple...

https://nova-wiki.win/index.php/Is_an_18,000_BTU_3-Zone_Mini_Split_Too_Small_for_My_House%3F

A 3-zone DIY mini split lets you tailor heating and cooling across multiple rooms without pricey ductwork. With units rated to -13°F for reliable winter comfort and SEER2 of 24, they’re efficient year-round