Understanding BTU Ratings
BTU (British Thermal Units) measures cooling capacity. The Department of Energy recently changed how portable AC BTUs are calculated, using SACC (Seasonally Adjusted Cooling Capacity) for more accurate real-world ratings.
As a general guide:
- 8,000 BTU: Up to 200 sq ft
- 10,000 BTU: Up to 300 sq ft
- 12,000 BTU: Up to 400 sq ft
- 14,000 BTU: Up to 500 sq ft
Add 10% for sunny rooms, kitchens, or spaces with high ceilings.
Single-Hose vs. Dual-Hose
This is the most important decision when choosing a portable AC. Single-hose units exhaust hot air outside, creating negative pressure that pulls warm air into your room through gaps and cracks. Dual-hose units draw outside air for cooling the condenser, preventing this efficiency-killing problem.
Dual-hose units cost more but deliver significantly better performance. We recommend them for anyone serious about portable cooling.
Features Worth Paying For
- Inverter compressor: Variable-speed operation for efficiency and comfort
- WiFi connectivity: Remote control and scheduling from your phone
- Dehumidifier mode: Useful in humid climates
- Auto-evaporative system: Eliminates manual water drainage