I have a home built in 1950. It has hot water, hydronic heat in the ceiling. Hundreds of feet of 1/2" copper tubing, 4" on center. The ceilings are about 2" thick, the tubing is imbedded in cement, then a coat of finish plaster. It is a very even heat. I can't imagine how much it must have cost!

Embedding something in the walls is going to be very expensive.

I took a look at the BEKA web site. It looks like someone's 6th grader designed it. Also none of the pdf's would open. I wouldn't buy a product from them.

Thanks for the response, Geoffrey B. We are trying to figure out the best way to go without using a forced air system.

As for the BEKA website, I didn't have any trouble opening the links...??

In most regions, if you are going to have active cooling, you will have high humidity if you don't have condensation on your cooling surface. What will you do with the water running down your walls.