But all the same, the most practical and economical are chimneys for fireplaces that are built into the internal walls. Such designs are equipped directly during construction work and do not require the foundation. When arranging wall chimneys, one nuance must be taken into account: with the design of the fireplace, location, dimensions, you need to decide at the initial stage of the construction of the house. Chimneys are built into the outer walls very rarely, since the chimney will cool very quickly, and this leads to the appearance of condensate chimney on the walls.