... popular in market 3. pass CE approved Best-seller multi-split pioneer air conditioners 1. Multi-compressor design for separate control ... unit can connect many indoor unit to use3. Available multi-split system from 1by2,1by3 to 1by4 (total capacity: 18,000 to ... 60,000btu)4. With optimized refrigeration system, the cooling/heating capacity are increased greatly5. Refrigerant: R22, ...