I would like to install warmfloor in two existing bathrooms that I am going to remodel. I have a basement beneath each bathroom and would like to know if the system works well between floor joists (16" centers). I have 3/4" tounge & groove plywood subfloor and am going to put down ceramic tile. Especially in one bathroom there is nowhere to put transformer except in vanity cabinet, but if able to install heating elements with good heat results between floor joists this would rectify transformer location problem. One bathroom desired floor heating area is 6' long by 3' wide. The second bathroom area would be 7' long by 4' wide. The second bath has an adjoining closet which would make it possible to mount the transformer in if recommended, but I like the idea of putting everything underneath the subfloor. The second bathroom floor joists run the width direction whereas the first bathroom joists run the length direction. Please advise for best results. Thank you.