![]() ![]() The math simply doesn’t add up and over time that additional weight can start to crush the sheet metal supports beneath the fireplace and overheat combustibles beneath the system.Īlong with this, some inserts that are “approved” for installation into a prefabricated fireplaces want high temp or HT tests be performed and passed by the chimney systems through which they run. A few examples of some common issues are outlined below.įor example, approving the addition of a 300-500 pound insert into a prefabricated unit that should only hold up to 110 pounds of wood doesn’t make sense. In the end, when it comes to installing an insert into a prefabricated system, there are many things that simply don’t add up with and that insert manufacturers aren’t able to provide clear answers for. In this way we can be sure that it meets and exceeds all minimum requirements and continue to put your safety and peace of mind first in all that we do. Here’s what we suggest – rather than install an insert, remove the prefabricated unit altogether, then install a high-efficiency wood or gas fireplace instead. In the end, assuming your insert will be fine just because your fireplace fairs okay isn’t going to be a viable option.Įssentially, because there is so much variety when testing both prefabricated fireplaces and factory-built inserts, it is hard to guarantee combining any two would produce good or safe results unless they were specifically tested together. This means your fireplace and insert go through different testing processes, and just because a certain test was successful with the fireplace doesn’t mean it will be successful with the insert installed. They are currently not inserted into a fireplace as part of any UL test. Stoves and inserts are only tested as freestanding room heaters. The UL tests their prefabricated fireplaces and factory-built inserts separately, and each system must pass a wide range of tests to get approved. Fireplaces & Inserts are Tested With Different StandardsĪnother important factor to keep in mind is just how these units are tested. And many older models won’t even have language regarding inserts in their manuals at all. In the end, most prefabricated or factory-built fireplaces don’t allow inserts to be installed into their systems. They are considered an aftermarket part and may alter the heat signature of the appliance. ![]() ![]() In general appliances not listed as a part of the original factory built fireplace should not be installed. Currently there is no standardized test to allow this type of installation. Remember – just because a manufacturer says their insert is approved for installation into a factory built fireplace it doesn’t mean it has actually been tested. For more information on the specific codes, standards and potential issues if you are considering this type of an installation please read this document that our owner put together for the task group formed by Underwriters Laboratory (UL) to explore this specific issue.ĭownload: Current Issues with Solid-Fuel Inserts in Factory Built Fireplaces and Chimneys There is often confusion surrounding the codes, standards, listings (tests), and manufacturer instructions as they relate to these types of installations. There are currently no standards from the Underwriters Laboratory (UL) for testing this type of set-up though beginning at the end of 2021 discussions began at the request of a fire investigator from Ohio who has seen hundreds of fires related to inserts in factory built fireplaces over the past several decades. Unfortunately, this isn’t an option either. Many wonder if we could add the insert, then perform new tests to ensure everything is okay. In these cases, the appliance will overheat and any surrounding woodwork or flammable materials could ignite. The addition of a fireplace insert with drastically different heating characteristics can alter these clearances and potentially change the heat signature of the entire appliance and venting system. Test Standards & Clearances Often Get AlteredĮvery prefabricated fireplace has standards and clearances that must be met to ensure the safety of the homeowner. Our CSIA-certified sweeps can guarantee you stay safer and more comfortable while navigating all of your chimney and fireplace-related needs. Count on the team at The Chimney Doctor to help you out every step up of the way. Regardless of the reason, there are a few things you’ll need to keep in mind before moving forward. Or maybe you just want a new style, and this seems like the best route. Adding an insert can also be an option when looking to switch up fuel types. For one, fireplace inserts are known for their heightened efficiency, so more heat and less energy costs may be a goal for some. There are lots of reasons a homeowner might wish to add an insert to their prefabricated fireplace. ![]()
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