[djmcmath]

We've all heard of radiant heating, typically the in-floor kind. My house has the older kind, with the cast iron radiators in each room. It works great, in that it provides lots of heat. Controlling temperature is ... painful, but that's a different post. I think the right answer is to convert the control system over to something more like the modern in-floor systems use, where it maintains a relatively constant temperature. But that's not the question from this post...

Here's the question for the Pelican Brain Trust: Is there any way to adapt the heating system to be a cooling system? How cool would I have to cool the radiator water to make it effective, say, to keep the house below 80F on a warm summer day? Is there an affordable pre-existing solution that could, basically, replace the furnace in the loop and make the radiator water 50F instead of 120F? Is this a wheel that's been invented already, and if so, how many spokes did it have?

Thanks,
Dan