In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Would it be a viable design to use heat transfer plates such as Joist Trak on top of the gypsum wallboard ceiling in an attic space and cover it all with a lot of insulation to create a radiant ceiling instead of a radiant floor? It seems like it would be a much easier install than tearing down the basement ceiling to install a radiant floor. Not having to worry about the resistance of wood and the hardwood flooring seems like a benefit too.
I still like the idea of radiators with TRV's but I want to explore the options as my clients don't like the look.