1 - BASIC Cassette Inverter Air Conditioner, 18,000 BTU Hot/Cold unit. Price includes tax: 3,650 SAR. 2 - BASIC Cassette Inverter Air Conditioner, 24,000 BTU Hot/Cold unit. Price includes tax: 4,150 SAR. 3 - BASIC Cassette Inverter Air Conditioner, 36,000 BTU Hot/Cold unit. Price includes tax: 5,500 SAR. 4 - BASIC Cassette Inverter Air Conditioner, 42,000 BTU Hot/Cold unit. Price includes tax: 7,500 SAR. . Price for installing one air conditioner is 450 SAR without copper. Price per meter of copper is 80 SAR. One-year warranty on installation.