What techniques can help rationalize energy use in existing buildings?
Energy management in buildings

Energy management in an existing building begins with reducing heat loss (or heat gain in summer) from the building envelope. To achieve this, each component of the envelope must be considered.

Joinery/glazed walls: these are generally the weak points of the envelope. Replacing existing joinery, particularly single-glazed units, with more efficient systems (double-glazing, with thermal bridge breakers, low-emissivity, etc.) can easily...