The chimney is one of the features in your home to consider when getting a boiler replacement. If the same boiler has been in use in your home for over a decade and now you want to replace it, consider the compatibility of a new appliance with the flue system currently in place. Before a contractor can swap in a new boiler, they will have to evaluate the state of your chimney. Why is it crucial to have a chimney that is compatible with the boiler you are installing?
Heating appliances like boilers use chimneys for their venting requirements. The flue provides passage for draught, which has a few advantages. Sufficient draught is required for the combustion process in a boiler. Inadequacies will lead to an inefficient appliance. A boiler that lacks enough draught will also result in higher levels of carbon monoxide, and that can be very harmful. The flue should be large enough to allow adequate draught to get down to the boiler.
The other reason to get a suitable flue system is the damage caused by high-efficiency boilers. Getting a boiler replacement of high-efficiency standards is ultimately the best choice for your pocket. There are, however, some implications. Newer heating appliances use up a majority of the heat, leaving very little to go up the chimney. When the flue gases reach the system, they are near condensation point. Then they come into contact with the chimney masonry and condense, leaving moisture that reacts with acidity. This combination results in corrosion of the chimney and ultimately, damage.
A heating contractor can provide various recommendations regarding getting an acid-resistant flue for a high-efficiency boiler. Getting a plastic flue pipe is one way to do it. You can also opt to get a new chimney system or use a lining. A professional contractor will also recommend the best and approved materials to use with a high-efficiency boiler.
Venting high-efficiency boilers into masonry chimneys, finehomebuilding.com
Upgrading your boiler, cse.org.uk