1. Self-regulation 2. Safe and Reliable 3. Energy Conservation 4. Pipe and Tank Protection 5. Snow Melting ... ) Minimun operating temperature rating of 40F Degree(-40 Celsius Degree)3.Power output at 10 Celsius degree(W/ft):10,12 ... /0.6, 19/0.23, 19/0.3, 37/0.3. 6.Optional jacket: PE, PVC, FRP,Fluoroplastics 7.Energy efficient:Self-regulating ...