Marco Fireplace Doors — Custom Replacements, Built by Model
Marco was a California manufacturer whose prefab fireboxes were installed by the tens of thousands in homes built from the 1970s through the 1990s, especially across the West. Marco went out of business years ago and no factory doors have been produced since, which is why searching for a Marco door mostly turns up parts diagrams and dead ends.
Find your Marco model
The rating plate is usually riveted inside the firebox: check the side wall just inside the opening, or up behind the top edge of the face. On Marco louvered heat-circulating models the plate hides behind the bottom grille; on clean-face units it will almost certainly be inside the firebox itself.
Marco stamps a numeric part number as well as a letter model, and the two identify the same fireplace — 792794 is the D41CF, for example. Sister models on a shared chassis take doors built the same way: the 41-inch family includes the 792795A (D41CFI), 792796A (D41HC) and 792797A (D41HCI).
- Marco 792794 doors
- Marco B36 doors
- Marco B41CF doors
- Marco B41HC doors
- Marco C36 doors
- Marco C41 (792848/792849) doors
- Marco D36 doors
- Marco D41 doors
Model not listed? Send a photo of the fireplace and its rating plate through the AI Fireplace Expert — it matches the unit and tells you what to measure. We build doors for openings, not for model numbers, so an unlisted model is not a problem.
Why a universal door will not fit
A prefabricated firebox is sheet metal, not masonry: a thin steel face, louvers, and engineered air passages the unit needs to cool itself. A universal or masonry-style door is designed to overlap a brick face and clamp to it. On a prefab that overlap sits proud of the face and blocks the louvers and cooling-air paths.
- Prefab fireplaces need an inside-fit door that mounts within the opening itself.
- Nominal size is not door size. A "36-inch" fireplace is a size class, not a measurement. Actual openings vary between installations because surrounding brick, tile or facing work changes the usable opening.
- The tolerance is tight. A door that is half an inch off will not seat in an inside-fit frame — which is why we build to the nearest 1/8 inch instead of stocking standard sizes.
How to measure your opening
You need three numbers, and you should record the smaller figure of each pair — openings settle and facing work is rarely perfectly square.
- Opening width — measure at the top and at the bottom.
- Opening height — measure at the left and at the right.
- Rear width — if the firebox tapers toward the back.
Our step-by-step measuring guide walks through it with photos; it takes about five minutes with a tape measure. If you are not sure whether you have a prefab or a masonry fireplace, start with masonry vs prefab.
Which doors we build for prefab fireboxes
Three of our lines cover almost every prefab replacement:
- Brookfield — the most common prefab replacement. A flexible-mount frame that clears factory louvers cleanly and forgives slight measurement variance.
- Stiletto Cutback — a modern slim profile for units with cleaner-line surrounds. Inside Fit primary, with a cutback variant for overlap installs.
- Cabot — slim and modern, for models without louvers such as inserts and see-through units.
Not sure which fit type you need? Inside fit vs overlap fit explains the difference in two minutes.
Ordering
Configure your door on the fireplace doors collection — enter your dimensions, choose frame style and finish, and your exact price appears online. No quote request, no waiting for a callback. What drives the price is line, size and finish; our fireplace doors cost guide breaks the ranges down.
Free standard shipping on orders over $99; orders under $99 ship for a flat $9.95. Every order gets a hand fit-review before it goes into production. Questions about your model: (949) 619-7824.