Virginia Cooperative ExtensionGrisso, Robert D.Walker, Martha A.Ignosh, JohnAgee, Philip2020-06-152020-06-152020http://hdl.handle.net/10919/98870Annual Fuel Utilization Efficiency (AFUE) describes heat produced from energy used. STAR qualified oil and gas furnaces have AFUE ratings of 85% and higher, making them up to 15% more efficient than standard models. Heating system performance factors.2 pagesapplication/pdfen-USVirginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.Extension publicationhttps://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/2901/2901-9005/BSE-292.pdfHeatenergy exchangeEfficiency