Section 150.640 - Windows(A) The total glass area of windows in each resident room shall be not less than 10% of the entire floor area of such room.(B) In order to furnish natural fresh air, the windows in each resident bedroom shall be operable. Exceptions to this standard will be considered in cases of fully air conditioned facilities or areas.(C) Windows with sills less than 30 inches from the finished floor shall be provided with readily removable window guards or special safety beams for the protection of residents.(D) Operable windows shall be provided with screens constructed from not less than 16 mesh wire screening.(E) All outside windows shall be made draft-free by the installation of either weather stripping or caulking material.Adopted by Mass Register Issue 1361, eff. 3/23/2018.