If I get a new a new window installed, how do I know what standards of quality or energy-efficiency it meets? Do new windows need to comply with the Chicago Energy Code?
Primary new manufactured windows are rated by the National Fenestration Rating Council (NFRC), and carry a sticker showing energy-efficiency data. If the windows you are considering are not rated by the NFRC, you should probably look elsewhere, because these are likely low-quality windows that do not meet any standards. See the NFRC web site for a detailed explanation of the ratings. Chicago Energy code requires all new windows to have a U-factor of .35 or lower. Keep in mind that .35 is not at all stringent, and if windows are being replaced anyway, owners should consider finding a window with a U-value that is far lower for increased energy efficiency. Also be aware that windows that do not meet Chicago Energy Code are routinely installed by contractors in Chicago, in violation of the law. Virtually all new window replacement projects need to comply with the energy code. There are no “grandfathering” exceptions (although some very rare and narrowly defined exemptions do exist). Repai
