... the market. The first set of Chunlan air conditioner was produced in 1973, it was ... 96000BTU;4. Duct air conditioner: 12000BTU,18000BTU,24000BTU, 30000BTU, 48000BTU, 60000BTU, 960000BTU;5. Floor ceiling air conditioner: 18000BTU,24000BTU ... ,36000BTU, 48000BTU,60000BTU6. Cassette air conditioner,18000BTU,24000BTU,36000BTU, ...