Revisions log for Answer #62

We currently have floating hardwood flooring, and the underfloor heating system works perfectly. However, I don't measure it in any way, I'm guided by how I feel, and that's fine.

I always recommend testing individual situations live somewhere to get a feel for it. There are also vendors who install solid wood planks in a floating method on a screed that is then stapled together, this is also a viable option.