The DITRA-HEAT heating cables cannot be installed under vanities with no airspace underneath, bathtub platforms, free standing bathtubs with no airspace underneath, kitchen cabinets and islands, appliances, or in small storage or clothing closets where there is or could have various items on the floor. Excessive heat will build up in these confined spaces and may cause cable overheating.
Additionally, heating cable placement is limited by minimum spacing of 2" (50 mm) from walls, partitions, and fixed cabinets, 8" (200 mm) from other heat sources such as baseboard heaters and other fixed heating devices, fireplaces, , etc., 4" (100 mm) from forced air heating vents, and 7" (180 mm) from the centerline of toilet drains. The minimum spacing from any drain pipe must be 4" (100 mm). With a KERDI-LINE linear drain, the heating cable must be 4" (100 mm) from the actual drain pipe and a minimum of 1" (25 mm) from the channel body edges.
Please refer to the Schluter®-DITRA-HEAT Installation Handbook for a complete list of limitations, requirements and installation guidelines. Please also refer to applicable building and electrical codes in your area.