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2. Trace heating - Wikipedia

   en.wikipedia.org/wiki/Trace_heating

   Placement of heat trace cable on roofs or in gutters to melt ice during winter months. When used in gutters the cable is not meant to keep the gutters free of ice or snow, but only to provide a free path for the melted water to get off the roof and down the downspout or drain piping.

3. Snowmelt system - Wikipedia

   en.wikipedia.org/wiki/Snowmelt_system

   A heated sidewalk in Holland, Michigan Installation of a geothermal snowmelt system on a street in Reykjavík, Iceland.. A snowmelt system prevents the build-up of snow and ice on cycleways, walkways, patios and roadways, or more economically, only a portion of the area such as a pair of 2-foot (0.61 m)-wide tire tracks on a driveway or a 3-foot (0.91 m) center portion of a sidewalk, etc.

4. Neher–McGrath method - Wikipedia

   en.wikipedia.org/wiki/Neher–McGrath_method

   For uninsulated cables (typically used in outdoor overhead installations), the tensile strength of the cable (as affected by temperature) is normally the limiting material property. The Neher–McGrath method is the electrical industry standard for calculating cable ampacity, most often employed via lookup in tables of precomputed results for ...

5. Thermal transmittance - Wikipedia

   en.wikipedia.org/wiki/Thermal_transmittance

   To calculate thermal transmittance when there are "bridging" mortar joints it is necessary to calculate two quantities, known as R max and R min. R max can be thought of as the total thermal insulance obtained if it is assumed that there is no lateral flow of heat and R min can be thought of as the total thermal insulance obtained if it is ...

6. Rain gutter - Wikipedia

   en.wikipedia.org/wiki/Rain_gutter

   Lead guttering: slate and pitched valley gutter flow into parapet gutter, with downpipe and overflow Eaves gutter and downpipe Decorative lead hopper head dated 1662, Durham Castle A rain gutter , eavestrough, eaves-shoot or surface water collection channel is a component of a water discharge system for a building. [ 1 ]

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