TCL 18000 BTU T1 Pro Inverter Air Conditioner Heat & Cool TAC-18CHSA/TPG11I - This 18000 BTU air conditioner is suitable for 20–35 m² areas. Pro Inverter technology optimizes energy use and keeps temperature stable. R410A refrigerant provides reliable performance. 51/43/40 dB indoor noise level is suitable for daily use. Heat & Cool function ensures comfort in all seasons.