The advertised width is only a starting point. An insert also has a body, a required opening, a visible face and a depth that can change from front to back.
Measure the space you really have
For an existing fireplace, record width and height at both the front and rear, then measure usable depth to the first obstruction. For a media wall, include finished surfaces, the outlet, TV position and access needed after the unit is installed.
What to compare on a product page
- The dimensions of the part that goes into the wall or opening.
- The opening or framing size required for that installation method.
- The face or trim size that will cover the finished edge.
- Power location, heat outlet and access shown for the exact model.
Fit and sizing guides
Fit and size decision guides
Electric Fireplace Insert Size Guide: Measure the Opening and Match the Right Fit
Measure an existing fireplace opening, understand insert dimension labels, and compare body, opening and trim sizes before buying.
How to Choose an Electric Fireplace Insert for an Existing Fireplace
Choose the right electric fireplace format for an existing fireplace, then check the opening, trim, power, airflow and exact model manual.
Recessed vs Wall-Mount Electric Fireplaces: Which Fit Path Works?
Compare surface, partial-recess and full-recess electric fireplace paths by wall depth, projection, finish, service access and exact model requirements.
Electric Fireplace and TV Wall Planning Guide: Fit Proportion and Checks
Plan an electric fireplace and TV wall from seated eye height, exact device dimensions and model-specific clearances before choosing a width.
Electric Fireplace Under a TV? Verify the Heat Path Before You Buy
Compare the fireplace outlet and exact clearance with the TV's placement limits, then see when to change the model, mantel or layout.
Electric Fireplace TV Stand vs Built-In TV Wall: Which Path Fits?
Compare floor depth, TV limits, assembly, wall work, power and service before choosing an electric fireplace TV stand or built-in wall.