Nearby cities with good air quality. Cities with similar population. Source: The Damascus, VA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency).
1 Hydraulic conductivity, a property of a porous material's ability to transmit water. 2  Thermal conductivity, the intensive property of a material that indicates its ability to conduct heat.  Rayleigh conductivity, describing the behavior of apertures concerning the flow of a liquid or gas.
Units for conductivity. Imperial â BTU*in/h ft ÂºF: In the Imperial system, conductivity is the number of British thermal units per hour (Btu/h) that flow through 1 square foot (ft 2) of material that is 1 in. thick when the temperature difference across that material is 1ÂºF (under conditions of steady heat flow).sed for standard building materials. In basic building materials, heat flow is usually measured by conductance (C) , not conductivity. Conductance is a material's conductivity per unit area for the object's thickness (in units of W/mÂ²K for metric and BTU/hrâ¢ft 2 â¢Â°F for Imperial).