The owners of this home did not want to tear out their hardwood floors but wanted to have radiant heating as the primary source. CRH installed 9" Zmesh through out the entire floor plan with the controls below in the basement.

The Zmesh runs between the joist system, wraps around the joist at the end of the run and then it's back in the opposite direction to do the same thing.

We have these pictures changing slowly so you can take a good look.