As against furnaces, fireplaces are used basically as additional heating premises(rooms) or their short-term heating in period
Inter-season periods. Fireplace warms up air in a room only while in it(him) burns fuel. For long and high-grade heating they may be recommended then when in their design heating air cavities informed with a furnace are stipulated. As well as furnaces fireplaces require an intensive air flow to furnaces, and - in greater degree as sizes chimney furnaces it is usual more, than oven, that is caused by a principle of heating by open fire. For big fireplaces it is necessary to provide special channel with area of cross section not less than 250 sm, necessary for an air flow from uninhabited premise(room), for example from
Sensations which are complex for transferring... One of them - to make fire in rainy weather, living in modern comfortable apartments, and it is even better - in cosy "country house". fireplace also is translated with latin as "center".
Not so long ago center (furnace) served for heating and cooking in houses. And today it is quite often applied to heating.
There is a hypothesis, that from a word "fireplace" there was a word "room". traditional fireplace first of all that allows to admire a flame owing to opened fireplaces and heats up a premise radiant energy for few minutes. A fireplace - a symbol of house, a cosiness, stability. history of a fireplace in Russia totals only pair centuries. Initially they have appeared in houses of notable boyars, then, during Peter's I epoch, fireplaces start to establish in interiors of palaces. In Russia fireplace always was a parameter of social importance of owner. sanction to construction of fireplaces was one of privileges presented by Peter I to Russian nobility. And today, visiting fine palaces of Petersburg, we admire fireplaces which easily got on with traditional furnaces, adjoining a beside in an interior, decorating with its alive fire. At same time essential lack of a traditional fireplace is its inability to keep warmly long time in what it strongly loses usual furnace. Because of opened fireplaces spaces of small depth and absence to fuel acts much more air, than it is necessary for its maximal combustion, and draft in a flue of a fireplace is insufficient. Therefore fireplace uses not all thermal energy from fuel - and most part of hot gases leaves in a chimney. Heating of a premise is carried which take up an insignificant part of heat, and due to radiant energy proceeding from burning fuel.
Variety of designs and forms of fireplaces, as well as furnaces - is indefinite Sizes and forms of fireplaces, and also a material from which they may
To be made it is, less, than furnaces, hold down imagination of designer as efficiency of thermal radiation in them does not depend on area of heating of a working body. However correct functioning of a fireplace at which does not occur allocation of a smoke premises(rooms) and is provided maximal useful Allocation of heat, depends on certain parity(ratio) between height of a chimney, its(her) cross section and area of a working surface open furnaces. area of open aperture inverted to a premise(room) furnaces also may not be anyone and is caused by sizes of a heated premise(room).