The difference between HIRD and JHSF1 Roof Heating Cable

As the temperature decreases, the formation of an ice dam becomes possible. After the snow, there will be a lot of snow on the roof. When the temperature of the roof rises, the snow will melt. As the water flows down away from the heated areas, it freezes again. And the freezing water prevents melting snow (water) from draining off the roof. The water that backs up behind the dam can leak into a home and cause damage to walls, ceilings, insulation, and other areas. That resulting in many homeowners lose lots of money on it.

The heating cable is one of the effective ways to prevent ice dams. HEATIT heating cable including two kinds of roof heating cable, HEATIT HIRD and HEATIT JHSF1.

Different working principles

HEATIT HIRD is a kind of constant wattage heating cable, which has a steady output and regular power is 5 watts/ft.

HEATIT JHSF1 is a kind of self-regulating heating cable, the output power will adjust automatically based on the ambient temperature at each point along the cable, and it can save more power than HEATIT HIRD.

Different material

HEATIT HIRD uses tough XLPE as inner insulation and weather resistant PVC (high-low temperature) as out jacket.

HAETIT JHSF1 uses tough XLPE as inner insulation and thermoplastic (PE) as out jacket, ingress protection 65.

Different suitable scope

HEATIT HIRD heating cable only designed for use on metal or plastic gutters/downspouts, inclined roofs, roofs with noncombustible shingles(Ex.: asphalt shingles) that meet national building codes.

HEATIT JHSF1 can be used on inclined roofs, flat roofs, metal roofs, asphalt roofs, rubber roofs, slate roofs, stone roofs, metal roofs, ceramic roofs, composite (tar and gravel) roofs and so on. Besides, HEATIT JHSF1 also can be used on plastic and metal water pipe (protect pipes up to 2.5″ in diameter).


HEATIT HIRD and HEATIT JHAF1 has its own advantages and needs to be selected according to your own requirements.

Leave a Reply