Brick;
steel;
Ceramic.
Brick pipes are not in special demand, as they differ in a short life. This is due to the fact that condensate is often formed on their walls. Stainless steel pipes have a much larger consumer period. Sandwich chimneys are especially popular. They are easily installed, quickly warmed up, have good traction and perfectly remove combustion products. Ceramic pipes also have good operational properties. But they are not so popular to a greater extent due to their high price.
