This is a guest article by John Siegenthaler. BTEC, HeatSpring, and John are running a 10-week advanced design class on biomass boilers in residential and commercial hydronic systems. Click here to learn more about the biomass design heating class. Click here to get your early bird discount.BTEC provides 30 discounts for each class of 50 students.
One of the tenets of modern hydronic heating is the need to protect conventional oil- and gas-fired boilers from sustained flue gas condensation. Whenever a hydrocarbon fuel is burned, one of the byproducts is water vapor. If the temperatures in the combustion chamber, flue, and chimney are high enough, this vapor passes through, and is released outside without creating problems. However, if the surface temperatures of the chamber, vent connector, or chimney are too low, the vapor condenses into a liquid that can be highly corrosive to steel and iron surfaces. I can also damage masonry chimneys. These situations must be avoided to ensure a long and efficient life cycle of steel, cast iron, and copper tube boilers.
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