Snow melt energy estimation?

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Up here in the Empire State, building designs sometimes incorporate heating systems in the exterior walkways for melting snow (for safety, but also so people don't have to go outside and shovel the snow). Even "green" buildings are not immune to this design feature. Don't get me started.
Anyway, does anyone have a handy calculator for estimating the energy for this process load? I would think you could get a rough estimate just based on annual snowfall for a given location. If you have the time and feel like creating one on your own, I will reward you with a custom popart eQUEST model in the shape of a subject of your choosing.

~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

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134 South Fitzhugh Street Rochester, NY 14608

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