soft, raised surface upon cloth, mid-14c., downy plumage, from Anglo-French pyle or Middle Dutch pijl, both from Latin pilus a hair (source of Italian pelo, Old French pel). Phonological evidence rules out transmission of the English word via Old French cognate peil, poil. Meaning nap upon cloth is from 1560s.
Updated 01/08/17. 1  of 06. Gas Furnace Types and Efficiency Ratings BanksPhotos / Getty Images The gas furnace in your home is a critically important appliance and one you depend on to work reliably, efficiently and quietly. 2  of 06. Low Efficiency Furnace: 55% to 72% AFUE (obsolete technology) Characteristics. 3  of 06.
Armstrong Gas Furnace Reviews | Consumer Ratings. Armstrong Gas Furnace Reviews . Armstrong offers a full-line of gas furnaces from 80% AFUE all the way up to 97% AFUE. Armstrong offers a high efficiency line of gas furnaces models. Armstrong uses staging to increase efficiency and staging ranges from 75% for low-fire to 100% for high-fire.