For 2026, an easy-to-install mini split with around 22 SEER2 efficiency strikes...

https://super-wiki.win/index.php/What_Does_HSPF2_Mean_for_Heating_Costs_on_a_Mini_Split%3F

For 2026, an easy-to-install mini split with around 22 SEER2 efficiency strikes a good balance between saving energy and costs. Look for models that run on a standard 115V plug so you can avoid complex electrical upgrades