Fig.1 Masonry Fireplace
This example shows a masonry fireplace with a marble front that is flush with the firebrick on the inside, so the Front Width measurement is the same as the actual fireplace opening.
Fig.2 Metal Prefabricated Fireplace
Here's a prefabricated fireplace where the width between the fireplace walls is less than the fireplace opening, so the Front Width measurement is smaller than the fireplace opening.
FRONT WIDTH: The front width is the actual "usable" space between the side walls inside your fireplace at the front, not necessarily the width of the opening. If the facia around your fireplace opening is even with the side walls of the fireplace on the inside, then the Front Width measurement is the same as the fireplace opening (see Fig.1). If you have a prefabricated metal fireplace (zero clearance fireplace) where the opening is actually wider than the width between the side walls inside, do not base the front width on the size of the opening, measure the functional width between the side walls of the fireplace (see Fig.2).
BACK WIDTH: The Back Width is pretty self explainitory and is the measurement of the narrowest width in the back of the fireplace (see Fig.1 and Fig.2 ).
DEPTH: The Depth is simply the measurement from the front to back of your fireplace on the inside. The Front is at the point from which you took the Front Width measurement (see Fig.1 and Fig.2 ).
Height: The height of your fireplace opening needs to be at least 18" for most gas logs. This may vary somewhat between models, but if your opening is at least 18" tall, you will not normally need to be concerned about the height of your fireplace opening..
About the Center Width: Use this measurement to confirm our calculations! The Center Width is the inside width measurement taken 7" back from the point from which you measured the Front Width. The "Center Width" is not a measurment that you enter into our Gas Log Size Calculator, it is automatically calculated based on the Front and Back Width dimensions that you enter into our calculator. This is approximately where the burner and pilot will be positioned when your logs are installed, which is the point where the clearances are critical. This is the most accurate way of determining if a particular gas log will work in your fireplace and no other website performs these calculations for you. So when you see reference to the required "Center Width" for our gas logs, you will know what this is referring to (see Fig.3). Compare this measurement to our calculations before making your purchase to ensure the logs you order will fit!
Enter your measurments into our calculator to find the right size logs for your fireplace. Our calculator automatically allows for the "Proper Clearance" based on the type of controls you select. Results are sorted by the "Largest Logs" that will fit your fireplace while maintaining the required clearance.
Fig. #3 above shows how the clearance from each type of gas log burner or control is required from the side walls of the fireplace. The critical measurement is the center width of the fireplace where the burner is placed. Our calculator automatically calculates this distance and takes into account the required clearance for every gas log burner system that we offer. When you use our calculator, only logs that will fit your fireplace will show up in our search results.
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