FMI (Fireplace Manufacturers, Inc.) prefab fireplaces are found in homes across the country, and tracking down a replacement glass door that fits one properly can be tricky. Brick-Anew builds custom-fitted prefab fireplace doors for a wide range of FMI models, made to the exact dimensions of your firebox opening for a clean, secure fit. Use the size guide below to find your model number, and if you don't see it listed, send us your model number and opening measurements and one of our specialists will help you find the right replacement door.
If your model is not listed on our chart below, email us at [email protected] with your model number and we will assist you in getting a perfect fitting door!
| MANUFACTURER BRAND | FMI MODEL NUMBER | FITS OPENING |
|---|---|---|
| FMI | 3600, 3601 | 36 x 21 7/16 |
| FMI | 36E, 36EC-II (opening 22-1/8” high - older model) | 36 x 22 2/16 |
| FMI | BDB36 | 36 x 21 1/2 |
| FMI | 36E, 36EC-II (opening 23-1/4” high - older model) | 36 x 23 4/16 |
| FMI | B36, B36L | 36 x 21 6/16 |
| FMI | C36 | 35 x 21 |
| FMI | 42MC | 42 x 24 |
| FMI | 42E,42EC | 42 x 22 |
| FMI | B42, B42L | 42 x 21 6/16 |
| FMI | C42 | 42 x 24 1/4 |
If you're not satisfied with your order, return it for free within 30 days.
Our fireplace specialists walk you through the entire ordering process.
All of our fireplace doors ship free to anywhere in the continental US!
We pride ourselves on having the most competitive prices on the web.

Prefab fireplaces will typically have a metal plate on the front or just inside the firebox. This plate tells you which brand you fireplace is, as well as the specific model number. Many fireplaces also have the manufacturer logo on the front plate of the firebox.

Once you’ve identified the manufacturer and model number, take some pictures of the height, width, and recess depth of your fireplace. See below for more info on how to take proper measurement photos.

Once you’ve taken your measurement photos, send them to [email protected]. One of our fireplace specialists will reach out to personally confirm your order and ensure that your prefab fireplace door will fit perfectly upon arrival.
Get down level with the fireplace, take picture head on.
*We want to see at least 2 inches of what is surrounding your opening.

With tape measure in full view from beginning to end, take width measurement. Inside opening. Metal lip to metal lip.

With tape measure in full view from beginning to end, take height measurement. Inside opening. Metal lip to metal lip.
*If you know your fireplace model number, don’t worry about sending us pictures #4-6!

Look up into your top track area (where your doors would roll back & forth) and show us how wide that track is with your tape measure.

If you have a bottom track, measure the track. If you don’t have a track, measure the small flat area right up front.

Put your tape measure lip on the outside of the fireplace. Going inward with your tape measure, stop at the first obstruction.

If you’re still unsure on your measurements sent your photos to [email protected] and our fireplace specialists will help you find the perfect door!