The ordinary fireplace is constructed generally as shown in figure 34. It
is essential (1) that the flue have the proper area, (2) that the throat
be correctly constructed and have suitable damper, (3) that the chimney
be high enough for a good draft, (4) that the shape of the fireplace be
such as to direct a maximum amount of radiated heat into the room, and
(5) that a properly constructed smoke chamber be provided.
[Illustration: Figure 32.--An adobe fireplace of the Mexican-Indian type
commonly built in the Southwestern States, especially when the house
walls are of adobe. The logs are stood up, leaning against the back of
the grate, in order to secure a high-licking flame.]