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.
Why is a gas furnace vented but a gas dryer is not? I live in a house in Ohio and I have four appliances powered by natural gas: furnace, water heater, dryer, and kitchen range. Of these, only the furnace and water heater are vented to the outside of the house (chimney stack). In this context, venting refers to a flue that directs combustion byproducts outside the house as opposed to a vent for waste water or the vent that directs hot air and lint away from the dryer.