Is Invizimelt listed and code compliant for under-roof installation?

Yes. The Invizimelt system, using Tuff Cable as the heating element, is ETL listed to UL Standard 1588 and CSA standards — making it the only listed system available for under-roof snow and ice melting in the United States and Canada. This listing makes the Invizimelt system the only under-roof deicing product fully compliant with NEC Article 426 for enclosed panel heating applications. For permitted construction projects requiring a code-compliant under-roof deicing system, Invizimelt with Tuff Cable is the only listed option on the market.