Snowfall Classifications
Roof Ice Dam Potential
Summit Ice Melt Systems’ Radiant Edge™ provides protection against dangerous ice dams and icicle formations.
Our full spectrum of offerings will protect your property in extreme, moderate, and mild snowfall areas.

- Annual snowfall greater than 100”
- Greater than 15” snow on roof most of the winter
- New England High Risk and Resort Areas
- Mountain areas, El. 6,000’+: High Sierras, Cascades, Colorado Rockies, Utah, Sun Valley, Big Sky, Jackson Hole Ski Areas
- Mountain areas: B.C., Northern Idaho, Northern Montana Ski Areas, Canadian Rockies
- Lake Effect Snow Areas: Northern Michigan, Northern Ohio, Upstate New York
Class 1 Area Product Recommendations
- Patented Radiant Edge PRO System with 24 watts/foot high-efficiency output
- Radiant Valley Panels with 24 watts/foot high-efficiency output
- S1 and S2 High-efficiency self-regulating 12 watt/foot heater cables for gutters and downspouts
- Patent Pending Radiant Edge LowSlope Panel System with 24 watts/foot high-efficiency output for roof slopes below 3/12

- Annual snowfall less than 100”
- Typical snow accumulations of 6” to 15” on roof for most of the winter
- Typical areas: Upper Midwest to East Coast, Western U.S. high plains and high deserts, Eastern Wyoming and Eastern Colorado to Wisconsin, Illinois to Massachusetts
Class 2 Area Product Recommendations
- For the ultimate in performance, select the Patented Radiant Edge PRO System with 24 watts/foot high-efficiency output
- Radiant Valley Panels with 24 watts/foot high-efficiency output
- Patent Pending Radiant Edge LT System with 12 watts/foot high-efficiency output
- Patent Pending Radiant Edge HotSlot System with 12 watts/foot high-efficiency output
- Radiant Valley Panels with 12 or 24 watts/foot high-efficiency output
- S1 and S2 High-efficiency self-regulating 12 watt/foot heater cables for gutters and downspouts
- Patent Pending Radiant Edge LowSlope Panel System with 24 watts/foot high-efficiency output for roof slopes below 3/12

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Annual snowfall less than 30”
-
Typical snow accumulations of up to 6” on roof for most of the winter
- Typical areas: New Mexico to Middle East Coast
Class 3 Area Product Recommendations
- Patent Pending Radiant Edge HotSlot System with 12 watts/foot high-efficiency output
- S1 and S2 12 watt/foot Zig Zag self-regulating heater cables
- For roof eave, gutter, and downspout applications
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