mostat on a 240v circuit. Cure: Make sure the radiant heat system is matched in terms of voltage and sized correctly to the circuit capacity and thermostat. It also could indicate the wire nuts are not sufficiently tightened. Make sure a licensed electrician makes the final connection. Problem: The radiant heat system doesn’t warm up. Cause: The main reason for this is a broken or severed heating ele- ment. Cure: Take care to protect the heating system during installation. This problem will require splicing/ repairing the heating element. Problem: The radiant heat system doesn’t provide evenly spread or consistent warmth. Cause: The main reason for this is varying or wrong spacing of cables or tubes. Follow manufacturer’s recommendations. Lack of insula- tion under the heat system may also cause heat-loss or heat-sink in areas of the subfloor. Proper insulation underlayment should be designed by the architect. Cure: Re-design floor and heat system installation including insu- lating tile underlayment. This cure will require splicing/repairing the heating element. In case of heat loss due to lack of insulation under the heat system, the application must be redesigned. The NTCA Reference Manual pro- vides more recommendations for suc- cessful radiant heat installations – and successful installations for a range of situations and products. To obtain your copy, visit the IndustryTechnical Manuals section under the NTCA Store link on the NTCA website, www.tile-assn.com, or enter http:// bit.ly/2mqafg9 into your browser. TECH TALK –––––––––––––––––––––––––––––––––––––––––––––––––––––––––– Schluter’s DITRA-HEAT-TB, now DITRA- HEAT-DUO, reduces sound transmission in multi-story residential buildings, while warm- ing the floor and supporting the covering to ensure a lasting installation. It also offers faster warm-up times. www.schluter.com Nuheat electric radiant floor heating sys- tems offers a variety of solutions from pre- built custom mats, off-the-shelf standard sizes, cable for on-site modifications fit- ting perfectly into uncoupling membrane. The Nuheat line of Next Generation Thermostats includes the industry’s first WiFi-enabled thermostat that works with Nest, taking comfort and energy savings to the next level by working together to automatically adjust to your schedule, sensing and reacting to your ever-chang- ing lifestyle. www.nuheat.com 78 TileLetter | March 2017