No, only one sensor is to be connected to the thermostat. We do recommend installing a second sensor in the floor and running its wires into the junction box, but not connected it to the thermostat. The spare sensor is necessary in case of a failure to the first sensor.
Installation of Mapeheat Membrane below luxury vinyl flooring follows the same installation method as engineered and laminate floors: First, embed the floor-heating system within cementitious material, ensuring in 1/4" (6 mm) of coverage above the heating system. Either a mortar or self-leveling compound can be used, but achieving the desired flatness is easiest with a self-leveling underlayment. Proceed with installing the floor covering on top, following the manufacturer’s instructions.
It does not matter. Provided that the manufacturer of the flooring products (coverings, adhesives, etc.) says they are compatible with floor-heating systems (always defer to the floor-covering manufacturer’s instructions), the installation is UL-approved.
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