Читать книгу The Self-Sufficiency Handbook - Alan Bridgewater - Страница 33

Flue gases from burning wood produce tar and impurities that will in time condensate on the inside surface of the flue. Because a stove is more efficient than an open fire, there will be a greater buildup of tars. Tar buildup is a problem for three reasons: (1) it will gradually leach through and stain your walls; (2) it will eventually run down the chimney as a sticky residue and maybe ooze onto the stove; and (3) it will increase the risk of a chimney fire.

Installing an insulated twin-walled chimney liner solves all of these problems; not only does the liner create a smooth surface that makes it difficult for tars to form, but, if tars do form, they are directed back into the fire to be burned again. Better yet, the consistent diameter of the liner and the fact that it is insulated result in the gases passing through the system more quickly; in short, the fire will have a better draw and be altogether more efficient.

In some areas, using wood for heat is an economical option.