Modern heat generators work on more efficient gaseous and liquid fuel with efficiency up to 90%. The temperature of the combustion products in this case is reduced to 150 ° C, and the requirements for heat resistance of the smoke excess channels are sharply reduced. But the problem of increasing corrosion resistance comes to the fore. The fact is that in such temperature conditions as a result of a chemical reaction, condensate is connected to combustion products with the formation of a mixture of aggressive acids. For brick chimneys, it is necessary to perform additional waterproofing, but a simpler and more effective method may be a choice for a pipe of acid -resistant materials: special steels, special varieties of polymers, glass or ceramics.
