These remarkable advances in window performance are due to technological developments in glass coatings and insulated glazing assemblies. These loads determine the size of the furnace, heat pump, air conditioner and fans that must be installed. Work with a local window expert to determine if your windows are giving you the biggest bang for you buck. If you windows don't seem to be hitting the mark for energy efficiency, don't worry. There are some basic tips that can make window replacement easy and help you get the most value for your money.
Several utilities offer incentives to homeowners who make energy-saving improvements.
Contact the utility company in your area to determine if you're eligible for a low-interest loan or discount for replacing your windows. Ask about insulating features. Look for the Energy Star. The Energy Star program was created by the Environmental Protection Agency and the DOE to help building owners and consumers identify windows and other products that save energy. Performance requirements are tailored to meet the energy needs of different climates.