Window-Mount A/C Units Installation 

Window-mount air conditioning units will be included in the FISP inspection performed by the QEWI, and will therefore be classified as Safe or Unsafe. The Department of Buildings issues guidelines for installing window-mount air conditioning units, including:

• Support the unit from underneath with metal brackets or firmly fasten it from inside with angles - any supporting hardware should be structurally fastened to the building (not the window frames) and must be strong enough for the weight of the AC unit.
• Install the AC unit so it remains in place when the window is opened, or affix it so that the window cannot be opened accidentally.
• Do not use loose objects, such as wood blocking, bricks, telephone books, or gypsum board to support the leveling of an AC unit.