The U-Value (reciprocal of thermal resistance, Rt value) is the rate of transfer of heat through a structure, which can be a single material or a composite, divided by the difference in temperature across that structure. The units of measurement are W/(m2 K). Currently, the three most ...
A Material reduction (Reduce the material intensity of goods and service, units of material per unit of economic value). B Energy reduction (Reduce the energy intensity of goods and services, units of energy per unit of economic value). C Toxicity reduction (Reduce toxic dispersion, units of ...