SEER, BTU, and Tonnage: An AC Buyer's Guide

https://meet-wiki.win/index.php/12_Things_to_Know_Before_Adding_Central_Air_to_an_Old_Home

If you've started shopping for a new air conditioner, you've encountered a set of technical terms that can make the process feel more complicated than it needs to be. SEER2. BTU/h. Tonnage. HSPF2