Equipment,% of buildings using it,% of floorspace in buildings using it,% of air-conditioned floor area it serves,Floor area served (million sq ft),Buildings where it is the main system (thousand),"Main system, % of cooled buildings",RSE of served share (%)
Packaged unit,43.3,58.6,51.7,"35,310","2,404",51.9,2.6
Central chiller (any fuel),3.4,18.5,19.0,"12,981",165,3.6,4.7
Residential-type split system,22.1,18.9,10.4,"7,082","1,128",24.4,6.1
Heat pump,8.3,11.6,6.9,"4,704",355,7.7,9.4
Individual (room) air conditioner,12.4,14.2,5.9,"4,043",465,10.1,8.3
District chilled water,0.9,4.3,5.1,"3,495",53,1.2,13.7
Swamp (evaporative) cooler,1.4,2.2,0.9,603,58,1.2,11.6