Superior BR-42 Fireplace Doors — Custom Exact-Fit Replacement
Replacement Fireplace Doors for the Superior BR-42
The Superior BR-42 is a 42-inch wood-burning, radiant-heat prefab fireplace that Superior (later sold under the Lennox Hearth Products name) shipped into hundreds of thousands of American homes from the mid-1970s through the late 1990s. It was a builder favorite: a clean smooth front, a brick-pattern refractory firebox, and a simple radiant design that just worked. If your home was built in that era and the firebox is metal with a brick-look lining, there is a good chance you are looking at a BR-42 or one of its close siblings — the BR-42-2, BR42I, or BRF42.
To confirm, find the rating plate. It is a small metal tag inside the firebox — usually riveted to the side wall of the firebox, or hanging on a thin metal strip up behind the top edge of the opening where the screen tucks away. You may need a flashlight and a damp rag. The tag lists the manufacturer and the model number, and that model number is exactly what you need before ordering doors.
Why You Can't Just Buy the Original Doors Anymore
Superior's original glass door kits for the BR series went out of production years ago. The brand changed hands more than once, and OEM door kits for fireplaces from this era are no longer manufactured. What you find secondhand is usually worn, warped, or missing hardware — and gaskets and hinges for those kits are just as extinct as the doors themselves.
Universal doors are not the answer either, and this is the part most homeowners learn the hard way. A prefab (factory-built) fireplace like the BR-42 is an engineered metal appliance, not a masonry cavity:
- Exact fit is mandatory. Prefab doors mount inside the opening against the firebox face. A quarter inch of slop means visible gaps, rattling frames, and screws that have nothing solid to bite into.
- Inside-fit, not overlap-fit. Masonry doors overlap the brick face and anchor into mortar joints. A BR-42 has neither — an overlap frame can block the cooling-air paths the firebox was designed and safety-tested with.
- The listing matters. Factory-built fireplaces are safety-listed as a system. Doors for a prefab need to be designed for prefab installation — attached to the unit's face without compromising the firebox.
One more trap: not every 42-inch Superior shares the same opening. Front dimensions vary between models and even between installations, depending on how the surround was finished. Never order doors off the model number alone, and never trust a chart that promises one universal size.
Our Approach: Doors Built to the 1/8" for Your Exact Fireplace
ExceptionalFire builds replacement doors for the BR-42 family to order, matched to your actual opening — not to a generic template. Here is how it works:
- Identify in 15 seconds. Snap a photo of your fireplace and rating plate and send it to our AI Fireplace Expert. It recognizes the model, flags the BR-42's known quirks, and tells you exactly which measurements we need.
- Price it instantly. Open the configurator on our prefab door collection, enter your measurements, pick frame finish, glass, and handle style, and see your price on the spot. No callbacks, no quote forms that go quiet for a week.
- Built to the 1/8 inch. Every door is fabricated to the dimensions you provide, so the frame seats cleanly inside the BR-42's opening with proper clearances and solid attachment points.
How to Measure Your BR-42 Opening
Measuring takes five minutes with a tape measure. You will record the width of the opening at the top, middle, and bottom, and the height at the left, center, and right — openings on 30- to 50-year-old fireplaces are rarely perfectly square, and the smallest numbers govern. Our step-by-step measuring guide walks you through it with photos, including how to handle a raised hearth or trim that crowds the opening. If anything looks unusual, send us a picture and we will confirm before you order.
What Not to Do with a BR-42
| Don't do this | Why |
|---|---|
| Burn wood with tempered-glass doors closed | Standard practice for prefab fireplaces is doors fully open during the burn. Tempered glass is not made to take direct, sustained fire heat with the doors shut. Close the doors as the fire dies down to stop warm room air from escaping up the flue. |
| Install masonry overlap-fit doors | They anchor wrong, sit proud of the face, and can interfere with the firebox's designed airflow. |
| Drill into the firebox walls or top | Prefab doors should attach at the face of the unit. Penetrating the firebox shell can compromise the appliance. |
| Measure the old door frame instead of the opening | Old frames were often shimmed or bent to fit. Always measure the opening itself. |
| Order by model number alone | Finished openings vary per installation. The measurements rule, every time. |
Frequently Asked Questions
Will glass doors fit my Superior BR-42-2 or BR42I?
Yes. The BR-42-2, BR42I, and BRF42 are variants within the same 42-inch BR family, and we build custom doors for all of them. Because we fabricate to your measured opening rather than a preset size, the exact variant matters less than an accurate tape measure.
Can I burn a fire with the glass doors closed on a Superior BR-42?
No — with a prefab fireplace like the BR-42, keep the doors fully open while a fire is burning. The doors earn their keep when the fire is out: closed, they seal the opening and stop conditioned air from pouring up the chimney, which is where most of the energy savings comes from.
How do I find the model number on an old Superior fireplace?
Look for the metal rating tag inside the firebox — on a side wall or tucked up behind the top of the opening near the screen track. If the tag is missing or unreadable, send a photo of the fireplace to our AI Fireplace Expert and we will identify it from the visible features.
How much do replacement doors for a Superior BR-42 cost?
Price depends on your opening size, frame finish, and glass options. Rather than quoting a vague range, our configurator shows your exact price as you build the door — takes about two minutes.
Get Your BR-42 Doors Started Today
Configure your custom Superior BR-42 fireplace doors online in the prefab door collection, or talk to a real fireplace expert — we are available seven days a week to check your measurements, confirm your model, and make sure the doors you order are the doors that fit.