> In this case, it's a combination of old, building-wide, steam radiator
> heat (which can't be controlled by tenants) combined with individual
> office AC. The combination of running AC to compensate for overheating
> suggests to me that energy needs to be a lot more expensive.
>
I had the impression that the steam that one sees rising from the streets of NYC came from a distribution network tied to the cities electric generating stations, and that the steam was used to heat a lot of the commercial buildings downtown.
Martin