Benefits: Energy & Cost Savings
The following information is an example of energy and cost savings for Boston and Phoenix. See Window Selection for a complete guide to energy savings for generic window products in your city or region.
Heating Season Savings
In climates with a significant heating season, windows have represented a major source of unwanted
heat loss, discomfort, and condensation problems. In recent years, windows have undergone a
technological revolution. It is now possible to have lower heat loss, less air leakage, and warmer
window surfaces that improve comfort and minimize condensation. The graph below illustrates the significant
savings in heating season costs associated with energy efficient windows for a house in a
heating-dominated climate. In cold regions, this means that windows are no longer an energy loser to
be avoided -- increasing glazing area with high performance windows can have little or no affect on
total energy use.
Cooling Season Savings
In climates that mainly require cooling, windows have represented a major source of unwanted heat
gain. In recent years, windows have undergone a technological revolution. It is now possible to
significantly reduce solar heat gain and improve comfort while providing clear views and daylight. The
graph below illustrates the significant savings in cooling season costs associated with improved windows for
a house in a cooling-dominated climate. In warm regions, this means that high performance windows can
face into the sun if desired without great energy penalties -- although shading techniques remain
important.
Energy and Cost Savings |
Improved Comfort |
Less Condensation
Increased Light and View |
Reduced Fading |
Lower HVAC Costs