Comparison · the first fork
Insert vs wall-mount
The first decision in this category, and it is usually made for you by what is already in your room. Here is how to tell which side you are on.
By Scooter M.Published September 2, 2026Last reviewed September 2, 2026
Disclosure: the buy links below are affiliate links. We earn a commission on Amazon purchases at no extra cost to you. It has never changed a ranking on this site, and every roundup here names a unit we think you should skip. How this site is funded.
The decision, made for you
If you have a masonry firebox, buy an insert. The expensive part of a fireplace is the opening, and you already have one. If you have a flat wall, buy a wall-mount unit and decide separately whether to hang it or recess it. The specifications are effectively identical either way — both cap at 1,500 W and about 5,118 BTU per hour.
That sounds too simple for a comparison page, and it is genuinely the answer for most people. Where it gets interesting is the minority of cases where you have both options, or neither.
The full comparison
| Insert | Wall-mount | |
|---|---|---|
| Needs | An existing firebox or framed opening | A wall — surface-mount needs nothing else |
| Look | Traditional. Reads as a fireplace | Modern. Reads as a linear band of flame |
| Heat placement | Into a recess. Infrared does better here than fan-forced | Seated chest height. The best in the category |
| Install | Measure, clean, place, trim | Hang in an afternoon, or cut and frame |
| Output | 1,500 W, ~5,118 BTU/hr | 1,500 W, ~5,118 BTU/hr |
| Running cost | ~27.5¢/hr | ~27.5¢/hr |
| Reversible | Entirely — it lifts out | Yes if hung, no if recessed |
The cases that are not obvious
You have a firebox but want a modern look
You can fit a linear unit into a masonry opening, and it usually looks wrong — a rectangular modern band floating inside a traditional brick arch reads as two design languages arguing. If you want the modern look and you have traditional masonry, the honest options are to rebuild the opening or put the linear unit on a different wall.
You have a wall but the room is traditional
A mantel package is the answer here rather than either of the two on this page — a fireplace with a surround built around it, which creates the traditional look without needing an existing opening.
You have neither and the room is small
A freestanding stove. It needs no wall and no opening, takes about two square feet of floor, and radiates from its whole front face. It is the answer nobody on the internet gives because it fits neither of the two categories people search for.
Quick picks
Ranked. The running cost column is computed from each unit's rated wattage, not quoted from a manufacturer. Tap a row for the full write-up.
| # | Product | Best for | Cost per hour | Price |
|---|---|---|---|---|
| 1 | PuraFlame Klaus 33" Electric Fireplace InsertThe insert answer. Glass door, mesh screen, brick-look interior — it fills a masonry opening and looks like it belongs there. | You have a firebox | 27.5¢1,500 W · 5,118 BTU | |
| 2 | R.W.FLAME 36" Ultra-Thin Recessed & Wall-Mount FireplaceThe wall-mount answer. At 3.86 inches deep it hangs today and recesses later, on the same unit. | You have a flat wall | 27.5¢1,500 W · 5,118 BTU | |
| 3 | Duraflame DFI030ARU 20" Infrared Electric Fireplace Log SetA log set. Nothing to size, nothing to trim, and the original masonry frames it the way it framed the old fire. | You have a firebox and a small budget | 27.5¢1,500 W · 5,118 BTU |
#ad Buy links are affiliate links — we earn a commission on Amazon purchases at no extra cost to you, and it never changes the ranking. How this site is funded. Running cost is computed at 18.34¢/kWh; see what these actually cost to run.
| Usage | Hours | Heat on (1,500 W) | Flame only (~100 W) |
|---|---|---|---|
| One evening | 4 | $1.10 | $0.07 |
| A week of evenings | 28 | $7.70 | $0.51 |
| A month, 4 hrs a night | 120 | $33.01 | $2.20 |
| A 90-day winter, 4 hrs a night | 360 | $99.04 | $6.60 |
| Per hour | 1 | 27.5¢ | 1.8¢ |
#1 · You have a firebox
PuraFlame Klaus 33" Electric Fireplace Insert
The insert answer. Glass door, mesh screen, brick-look interior — it fills a masonry opening and looks like it belongs there.
If there is an existing firebox, an insert is almost always the right answer, because the opening is already the hard part and it is already done.
33 1/16 inches wide by 25 9/16 high, 750 W and 1,500 W settings, with a resin log sitting on a grate above the ember bed so light gets underneath it.
Measure the rear width of the opening, not just the front. Masonry tapers, and that is where fitted-versus-returned gets decided.
What it does not do: No trim kit in the base version — an existing masonry opening wider than 33 in leaves a visible gap unless you buy the trim separately.
Published specs
- Heater:
- 750 W / 1,500 W, two settings
- Width:
- 33 1/16 in
- Height:
- 25 9/16 in
- Flame:
- LED, three intensity settings, runs with heat off
- Front:
- Glass door, mesh screen, three-sided brick interior
- Log:
- Resin cast log, 11 13/16 in high, on a grate over the ember bed
What it costs to run
- 27.5¢/hr on full heat
- $99.04 across a 90-day winter at 4 hrs a night
- 5,118 BTU/hr · 12.5 A on a 120 V circuit
Computed at 18.34¢/kWh (EIA, June 2026). Your rate will differ — work out your own.
#ad We earn a commission on this link at no cost to you. How this is funded. Price shown on the retailer's page.
Specs from: PuraFlame Klaus insert listing (specifications and dimensions); Walmart product listing — 750/1500 W rating confirmed.
#2 · You have a flat wall
R.W.FLAME 36" Ultra-Thin Recessed & Wall-Mount Fireplace
The wall-mount answer. At 3.86 inches deep it hangs today and recesses later, on the same unit.
With no existing opening, you are choosing between hanging something on the wall and cutting into it. This unit does both, which keeps the decision open.
750 W low, 1,500 W high, 120 V, a manufacturer figure of 5,100 BTU per hour and a 400 square foot supplemental rating.
Widths from 30 to 68 inches on the same specification, so the wall dictates the size rather than the product line dictating it.
What it does not do: No mantel, no surround and no trim for a masonry opening. Recessing it means cutting drywall and, in most homes, running a receptacle inside the cavity.
Published specs
- Heater:
- 750 W low / 1,500 W high
- Electrical:
- 120 V
- Heat output:
- 5,100 BTU/hr (manufacturer figure)
- Depth:
- 3.86 in — thin enough for a 2x4 stud bay
- Coverage:
- Rated by the manufacturer for up to 400 sq ft
- Flame:
- 12 flame colors, 12 ember-bed colors, 5 brightness levels, 5 speeds
- Sizes in the line:
- 30, 36, 42, 50, 60 and 68 in
What it costs to run
- 27.5¢/hr on full heat
- $99.04 across a 90-day winter at 4 hrs a night
- 5,118 BTU/hr · 12.5 A on a 120 V circuit
Computed at 18.34¢/kWh (EIA, June 2026). Your rate will differ — work out your own.
#ad R.W.FLAME is not a program we have joined, so we earn nothing here. How this is funded. Price shown on the retailer's page.
Specs from: R.W.FLAME recessed/wall-mount product page — full specifications.
#3 · You have a firebox and a small budget
Duraflame DFI030ARU 20" Infrared Electric Fireplace Log Set
A log set. Nothing to size, nothing to trim, and the original masonry frames it the way it framed the old fire.
The cheapest correct answer for an existing fireplace. It sits inside the opening, the brick stays visible, and there is no trim kit to buy.
Infrared quartz heat rated by Duraflame for supplemental heating up to 1,000 square feet, with independent flame and heat controls.
It solves the 'my fireplace is a black hole' problem for the least money of anything on this site.
What it does not do: The 1,000 sq ft figure is the manufacturer's supplemental-heat rating, not a claim that it will hold temperature in a 1,000 sq ft room. See our BTU page for what the wattage actually buys.
Published specs
- Heater:
- Infrared quartz, rated by the manufacturer for up to 1,000 sq ft
- Width:
- 20 in
- Form:
- Drop-in log set for an existing firebox
- Flame:
- LED with resin cast logs and glowing embers
- Control:
- Remote with adjustable thermostat
What it costs to run
- 27.5¢/hr on full heat
- $99.04 across a 90-day winter at 4 hrs a night
- 5,118 BTU/hr · 12.5 A on a 120 V circuit
Computed at 18.34¢/kWh (EIA, June 2026). Your rate will differ — work out your own.
#ad We earn a commission on this link at no cost to you. How this is funded. Price shown on the retailer's page.
Specs from: Duraflame DFI030ARU listing — infrared, 1,000 sq ft rating; Bed Bath & Beyond product page — 20 in infrared log set.
Questions people actually ask
Which is better, an insert or a wall mount fireplace?
Neither — they solve different problems. An insert fills an existing firebox; a wall-mount unit puts a fireplace where there is no opening. Output, running cost and heat quantity are the same. What you already have in the room decides it.
Can I put a wall-mount fireplace inside an existing firebox?
Physically often yes, visually usually no. A modern linear band inside a traditional masonry arch reads as two competing design languages. If you have a firebox, an insert is what fits it — both dimensionally and stylistically.
Which gives off more heat?
Identical output — both cap at 1,500 W and about 5,118 BTU per hour. A wall unit delivers it better because it releases the heat at seated chest height rather than into a recess, but it is the same energy.
Which is cheaper to install?
An insert into an existing firebox with an existing outlet is the cheapest install in the category — often zero labor. A surface-mounted wall unit is close behind. A recessed wall unit is the most expensive because of framing and the receptacle inside the cavity.
Sources
Every figure on this page is either taken from one of these documents or computed from a formula shown on the page. Nothing here is recalled from memory.
Read next
- Electric fireplace inserts for an existing fireplace
What fits a real masonry firebox, why the rear width is the constraint, and the three units that suit brick.
- Wall-mounted vs recessed
The same fireplace, two installs. What each costs in work, and what each looks like when finished.
- The best electric fireplaces with mantels
Mantel packages and consoles ranked on footprint, flame and running cost, with the one to avoid.
- The best electric fireplace inserts
Six inserts ranked by opening fit, flame mechanism and computed running cost — plus the one we would not buy.