A. Acrylic domes
B.H. Butal tape sealant
C. Neoprene gasket
D. Aluminium retainer frame
E. PVC draft seal
F. Weeping holes
G. Air tunnels
I. Self-tapping screws
J. Aluminium main frame
K. Styrofoam insulation
I. PVC rigid vinyl thermal barrier
M. Air space
