Today, many downtown areas are being rejuvenated with new restaurants and cool urban atmosphere but the problem is limited condominiums and apartments. Older office buildings that have been downsized are being redeveloped into homes but the window situation is dire. Rather than have your new home buyer pay $1,000 of dollars per month in heating and cooling bills, while hearing all of the sirens and traffic from the outside, why not consider RetroWAL™ as the best solution for your energy and comfort needs.