R-value (insulation) as ASHRAE 90.1 and the IECC prescribe U-values. However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. The SI (metric) unit of R-value is whereas the I-P (inch-pound) unit is For R-values there is no difference between US customary units and imperial units, so the same I-P unit is used in both. Some sources use ″RSI″ when referring
Ministry of Construction of Heavy Industry Gate Square. "Source": Ministry of Construction of Heavy Industry The Ministry of Construction of Heavy Industry of the USSR (Mintyazhstroy; ) was a central government institution charged with leading the heavy industry of the Soviet Union. It was established in 1946 to replace the several successor Commissariats to the People's Commissariat of Heavy Industry of the USSR, dissolved in 1939. After liquidation in 1953, it was reactivated from 1967 to 1986. The ministry headquarters was one of the Seven Sisters built during the last 10 years of Stalin's life, also known as the Red Gate building owing to its proximity