Upgrading your building

ASHRAE's weekly eNewsletter "The HVAC&R Industry" quoted this interesting statistic:

"According to Research shows that over 50% of commercial buildings were built prior to 1980. For all commercial buildings, over 70% have not had an HVAC or lighting upgrade, or had their windows replaced; and, nearly 90% have not had an insulation upgrade."

This shows that there is plenty of opportunity to save energy costs for more than one out of every three buildings that we see.