To agree with chmullig, NYC apartments I&#x27;ve seen are almost all steam heated, but I don&#x27;t think I&#x27;ve ever heard of a working valve.  Most people I know adjust temperature in the winter by opening windows (apartments are largely overheated, for some reason).<p>The reason we heat with full-apartment systems and cool individually is that landlords are required to pay for heating (and hot water) but don&#x27;t want to pay for cooling.