Centralised air conditioning	Capital Cost 2000 (£/m²)	Fuel Cost 200 (£/m²/y)
Contstant volume (single zone)	200	3.5
Variable air volume (vav)	225	2.9
Dual Duct	265	3.9
Partially Centralised	Capital Cost 2000 (£/m²)	Fuel Cost 2000 (£/m²/y)
Centralised with local re-heat	225	3.6
Induction systems	200	3.7
Fan coil systems	165	3.7
Packaged	Capital Cost 2000 (£/m²)	Fuel Cost 2000 (£/m²/y)
Heating and Ventilation only	110	1.6
Self-contained	90	3.9
Split systems	105	3.9
Individual reversible heat pumps	110	3.5
Varaible refrigerant flow	160	3.3