Portable Air Conditioners

As a general rule, you need about 20 BTUs per square foot. A 200 sq ft room needs approximately 4,000-5,000 BTUs, a 400 sq ft room needs 8,000-10,000 BTUs, and a 500+ sq ft room needs 12,000-14,000 BTUs. Add 10% for sunny rooms or kitchens.

SEER (Seasonal Energy Efficiency Ratio) measures AC efficiency. The minimum for new units is 14 SEER. We recommend 16+ SEER for moderate climates and 18+ SEER for hot climates where AC runs frequently. Higher SEER costs more upfront but saves on energy bills.

Yes, for most users. Single-hose units create negative pressure that pulls warm air into your room, reducing efficiency by 20-40%. Dual-hose units avoid this problem, cooling faster and using less energy. The efficiency savings can offset the higher price over time.

With proper maintenance: window ACs last 10-15 years, portable ACs 5-10 years, and mini splits/central AC 15-20 years. Factors affecting lifespan include usage frequency, maintenance, climate, and build quality.

Yes, all portable ACs must vent hot air outside through a window, sliding door, drop ceiling, or wall. There are no truly "ventless" portable air conditioners—any product claiming otherwise is likely an evaporative cooler, which only works in dry climates.