The neatest feature is that the sashes tilt open for easy cleaning. Pry off the inside casing. Remove the sash. Remove the pulleys and weights in the wall. Fill the weight cavity with insulation.
Components Fasten the metal brackets evenly down the window frame.
Snap the vinyl jamb liners in place. Install the header stop and foam weatherstripping gaskets. Fit the pivot pins into place, and install the sash. Repaint, clean or install new inside casing.