Issue link: https://read.uberflip.com/i/1333960
77 Materials for construction Building construction principles Normally out of sight, but no less important than any visible element are the building services such as heating and air conditioning. e problems of integrating unsightly air conditioning into the existing structure of this bar have been cleverly solved by Nelson Designs. A stretched vinyl material neatly covers the duct work, while providing a satisfying contrast to the brickwork. Mechanical and electrical systems

