The best B-vent gas fireplace depends on the opening size, ignition preference, and front style you want. The Empire Comfort Systems models below are B-vent fireplaces, with choices ranging from a compact 34-inch design to a 42-inch flush-face model. The Duluth Forge insert is included as a ventless alternative, not as a B-vent fireplace; choose it only if you are comparing venting types.
| Product | Best for | Key distinction |
|---|---|---|
| Empire Premium MV 42-inch Louver | Classic louvered look | Millivolt ignition |
| Empire Deluxe IP 34-inch Louver | Smaller openings | 21,000 BTU and IPI |
| Empire Deluxe MV 36-inch Louver | Mid-size installations | Millivolt ignition |
| Empire Premium MV 42-inch Flush Face | Clean-face styling | 42-inch flush-face design |
| Duluth Forge FDI32R | Ventless comparison | Dual-fuel, no chimney required |
Empire Premium MV 42-Inch Louver B-Vent
This natural-gas B-vent fireplace is best for buyers who want a larger, traditional louvered front. Its listed features include millivolt ignition for operation and a classic louvered design. The 42-inch size can suit a room plan where a wider fireplace is preferred over a compact model.
Choose this model if louvered styling and millivolt ignition are priorities. The listing does not specify a BTU output or detailed installation dimensions, so verify those requirements with the product documentation and a qualified installer before selecting it. Its natural-gas fuel type also makes it a poor match for buyers seeking a propane model.
Empire Deluxe IP 34-Inch Louver B-Vent
This is the best fit among these B-vent options for buyers considering a more compact unit. The listing gives dimensions of 14.87 inches deep, 37 inches wide, and 32.68 inches high, plus a 21,000-BTU output. It uses natural gas and an intermittent pilot ignition system with an on/off switch.
The louvered front and hand-painted ceramic fiber log set provide a traditional fireplace appearance. Choose it if the listed size and ignition style match your project. A limitation is that the interior liner is sold separately, so account for that additional component when planning the installation.
Empire Deluxe MV 36-Inch Louver B-Vent
The 36-inch Deluxe MV is best for buyers who want a middle-size louvered fireplace with millivolt ignition. The manufacturer listing emphasizes easy operation and a more prominent look than a smaller unit. It is a natural-gas model in the B-vent category.
Choose this model if a 36-inch format better suits the room than the 34- or 42-inch options. The supplied feature information does not state BTU output, full dimensions, or included components. Confirm these details before purchase, particularly if the fireplace opening or heating needs are tightly specified.
Empire Premium MV 42-Inch Flush-Face B-Vent
This natural-gas B-vent fireplace is best for buyers who prefer a clean-face look instead of a louvered front. Its listed features include a 42-inch format, millivolt ignition, and a design intended to serve as a room centerpiece. It offers a different visual choice from the Premium 42-inch louver model.
Choose this option if flush-face styling is more important than visible louvers. The supplied listing does not provide BTU output, dimensions, or installation details. Check the manufacturer’s specifications to confirm the model fits the planned opening and vent arrangement.
Duluth Forge FDI32R Ventless Insert
This product is not a B-vent fireplace. It is included as a comparison for buyers weighing ventless heating against a vented fireplace. The 32,000-BTU insert supports natural gas or liquid propane, has a remote with an LCD screen, and includes manual flame adjustment. The listing says no outside duct or chimney is needed and describes heating up to 1,500 square feet.
It may be best for a buyer specifically seeking a ventless dual-fuel insert, subject to local rules and installation requirements. Its nine hand-painted ceramic fiber logs and mesh screen provide a traditional appearance. Avoid it if your project requires a B-vent appliance or vented combustion exhaust.
Buying Guide: How to Choose a B-Vent Fireplace
Do you need a B-vent model?
B-vent fireplaces use a vent system to carry combustion exhaust outdoors. They are different from ventless models, which do not use an outside duct or chimney according to the Duluth Forge listing. Confirm the appliance type permitted for your home and location before comparing features. Local codes and installation conditions can affect what is suitable.
What size fireplace fits the opening?
Compare the manufacturer’s full appliance dimensions with the available opening and clearances. The supplied listing gives dimensions for the Empire 34-inch model, but not for the other Empire options. Do not assume the nominal fireplace width equals the required rough opening. Check installation documentation before ordering.
Which ignition system should you compare?
The Empire products listed here include millivolt ignition or intermittent pilot ignition. The Deluxe 34-inch model specifically lists IPI with an on/off switch, while the Premium 42-inch louver and flush-face models list millivolt ignition. Compare the operating method in the current specifications rather than assuming the systems work identically.
Do you prefer louvers or a flush face?
Louvered models have a visibly traditional front, while the Premium flush-face model is the clean-face alternative in this group. Style is only one selection factor: verify dimensions, fuel, venting, and required accessories. The 34-inch Deluxe listing notes that its interior liner is sold separately.
Frequently Asked Questions
Is the Duluth Forge FDI32R a B-vent fireplace?
No. The listed FDI32R is a ventless dual-fuel insert. It should not be treated as a B-vent alternative when a vented appliance is required.
Which listed B-vent model has stated BTU output?
The Empire Deluxe IP 34-inch listing states a 21,000-BTU output. The supplied details for the other Empire models do not specify BTU output.
Are these Empire fireplaces listed for propane?
The four Empire models are described as natural-gas fireplaces. The Duluth Forge insert is the only listed product described as supporting both natural gas and liquid propane.
Should I confirm installation details before buying?
Yes. Verify dimensions, clearances, venting requirements, fuel supply, and any separately sold components with the product documentation and a qualified professional.