La palabra hogar (como hoguera doméstica, fogón o anafre) se refiere al sitio donde se enciende fuego (con leña o algún otro combustible) en una vivienda y que ocupaba el espacio común y servía de cocina, comedor y estancia. El término hogar, proviene del vocablo latino «focāris», derivado de «focus» (fuego). En algunas regiones de España se denomina lar o llar. Por extensión, se llama hogar a la casa, el lugar donde se vive, porque en su origen se consideraba punto central de ella el lugar donde se encendía el fuego.

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A fireplace is a structure made of brick, stone or metal designed to contain a fire. Fireplaces are used for the relaxing ambiance they create and for heating a room. Modern fireplaces have variable heat efficiency, depending on the sophistication of the design. Historically they were used for heating a dwelling, cooking, and heating water for laundry and domestic uses. A fire is contained in a firebox or firepit; a chimney or other flue allows exhaust to escape. A fireplace may have: a foundation; a hearth; a firebox; a mantelpiece; a chimney crane, used in kitchen and laundry fireplaces; a grate; a lintel; a lintel bar; overmantel; a damper; a smoke chamber; a throat; and a flue. On the exterior there is often a corbeled brick crown, in which the projecting courses of brick act as a drip course to keep rainwater from running down the exterior walls. A cap, hood, or shroud serves to keep rainwater out of the exterior of the chimney; rain in the chimney is a much greater problem in chimneys lined with impervious flue tiles or metal liners than with the traditional masonry chimney, which soaks up all but the most violent rain. Some chimneys have a spark arrestor incorporated into the crown or cap. Organizations like the Environmental Protection Agency and the Washington Department of Ecology warn that, according to various studies, . The EPA writes "Smoke may smell good, but it's not good for you."

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