Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Can you not fit wireless radiator valves? Surely that would do the trick.
Reply to the thread, titled "cold rad" which is posted in UK Plumbers Forums on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.