Ever wondered what "tons" really means for your AC? It's not about how heavy your system is: it's all about cooling power! One "ton" equals 12,000 BTUs (British Thermal Units). You can actually spot your system's tonnage right on the outdoor condenser: check the model number for numbers like 18 (1.5 tons), 24 (2 tons), 30 (2.5 tons), 36 (3 tons), 42 (3.5 tons), 48 (4 tons), 60 (5 tons). Usually, the number shows up about halfway through the model. Not sure what you're looking at? No worries! You can look up your unit at building-center.org/tonnage-estimate-main/ or just give Accu-Temp a shout. We're always happy to give honest, straightforward answers. No pressure, just help. Stay cool, Central Texas!