Why are chillers not used for smaller buildings

[tj00343]

I've been reading that Chillers are preferred for larger buildings while DX units are preferred for the conditioning of smaller spaces. I can't understand why since I've seen that manufacturers do manufacture smaller chillers (<10 tons)

 

[russ_watters]

Chillers require chiller plants. So even if the equipment doesn't seem very expensive, it still is quite a bit more expensive to have a small chilled water plant than a DX system.