With over 20 years in the hearth industry, we get one question more than any other—“What have I got?” or “Is this a factory-built fireplace or a wood stove insert?” or “Is this a gas log set or a gas fireplace” or “It looks like a wood burning fireplace, is it?” No one in our industry intentionally set out to create a set of descriptions that lack clarity and uniformity, but that’s how it ended up. We’re here to help!

Masonry Fireplace versus Factory-built fireplace

Determining whether you have a masonry fireplace or a factory-built unit can be confusing. Both types of fireplaces can have steel fireboxes and both can have fire bricks lining the inside of the firebox; however, there are a few ways to tell what you have. If you see an orange or gray ceramic flue tile at the top of your chimney, then you have a masonry fireplace. Most masonry fireplaces in Colorado have a steel damper that pivots forward and back via a lever inside the firebox. If you find a round steel pipe sticking up at the top, then you probably have a factory built fireplace.

Fireplace versus Insert

This may be the toughest one for a homeowner to distinguish. While we do “insert” a factory built fireplace into the wall during installation, these appliances are different than “fireplace inserts.” To be an insert, a hearth appliance must be designed for installation inside a firebox that was built to burn cordwood. A built-in fireplace commonly has a region of black metal around the firebox – and so does a wood stove insert. If you find that the black panel around the fireplace can move, then you probably have an insert.

Gas Fireplace versus Gas Logs

Much like factory-built woodburners, hearth appliance installers frame gas fireplaces into the wall. This is distinguished from a gas log set, which we install in a wood burning fireplace. This choice is even more confusing when you add in the difference between natural vent gas fireplaces and direct vent gas fireplaces. A couple of key tell-tale signs: if your fireplace terminates horizontally, it can only be a direct vent fireplace or insert. If there is sand under the logs and you have to reach into the firebox to turn the burner on, then it’s a gas log set.

Lined or Unlined Wood stove Insert

Since 1984, the National Fire Protection Association Standard 211 has required wood stove inserts installations to have a pipe running at least up into the bottom of the chimney and it has recommended that a steel chimney liner (a pipe inside the chimney) run continuously from the stove exhaust up to the top of the chimney. If you have a liner that runs all the way up, it’s correct. If your chimney isn’t lined, we will remove the insert from the firebox during sweeping operations to remove the soot and creosote from the flue.

Chimneys versus Vents

Wood burning chimney systems meet a higher standard and degree of protection than vents. Gas and pellet venting cannot properly vent a wood burning fireplace, stove or insert. But nearly all chimneys can be adapted for the venting of a gas or pellet appliance.

For More Chimney Help, Call Us!

With this information, you should be better able to determine what kind of hearth appliance you have. If you still have questions, feel free to reach out or to schedule a chimney sweeping and/or fireplace inspection. For all of your fireplace and chimney safety needs, contact us via our website, call us today at (303) 679-1601, or email us at Office@MtnHP.com. Semper Fi!