The 5 electric fireplaces we'd put on our own wall in 2026Top 5 electric fireplaces → See the ranking

Marsail 50" App Control, 4777 BTU Review

A 50-inch width, a 4,777 BTU heater and 20 flame colors: the Marsail 50" App Control (4777 BTU) covers what matters most in a recessed or wall-mounted fireplace. Add WiFi and app control and it makes a good match for running the fireplace from the sofa or your phone.

Price$239.99Price on Sep 30, 2026 · may have changed
Compare side by side ↗
Specifications
BrandMarsail
CategoryBuilt-in & wall-mounted inserts
Stated width50 in
Stated heat output4777 BTU/h
Installation typeRecessed (in-wall)
Flame colors20
ControlsRemote, app / WiFi
TimerUp to 8 hours
MediaCrystals
ASINB0DLL2J999

Full listing title: Marsail 50″ Electric Fireplace Heater with App & Remote Control, 4777 BTU Heat Output, Ultra-Slim Wall-Mounted or Recessed Electric Fireplace Inserts with Timer, 20 Flame Colors,SLELF02B-50

Listing evidence
Stated width50″ Exact listing
Stated heat output4777 BTU Exact listing
Installation typeWall-Mounted Exact listing
Updated October 2026
Exact listing, ASIN B0DLL2J999
Rating from a published formula

Compared with similar inserts

The two recessed or wall-mounted fireplaces closest to it on our rating, with a dated price.

Compare side by side ↗

Marsail 50" App Control, 4777 BTU

Marsail 50" App Control, 4777 BTU

6.8Good · out of 10$239.99 Price on Sep 30, 2026 · may have changed
  • Stated: 50 in wide · 4,777 BTU/h · Recessed (in-wall)
  • Built-in & wall-mounted inserts
This product ↑
Sixfivsevn 36" Recessed and Wall Mounted

Sixfivsevn 36" Recessed and Wall Mounted

6.8Good · out of 10$169.99 Price on Sep 30, 2026 · may have changed
  • Stated: 36 in wide · 1,500 W heater · Recessed (in-wall)
  • Built-in & wall-mounted inserts
See the review ↗
Sixfivsevn 50" Recessed and Wall Mounted

Sixfivsevn 50" Recessed and Wall Mounted

6.8Good · out of 10$189.99 Price on Sep 30, 2026 · may have changed
  • Stated: 50 in wide · 1,500 W heater · Recessed (in-wall)
  • Built-in & wall-mounted inserts
See the review ↗

Heater output, per the listing

The heat the listing states. Plenty to take the chill off the room you sit in; how far it reaches depends on your insulation, windows and ceiling, and our supplemental heat planner turns your room into a rough answer.

What it has going for it

What changes in your evenings

50 in wide, per the listing. Wide enough to be the focal point of a living-room wall. Check in the installation drawing whether the figure is the frame or the viewing area, then hold it against your wall cavity.

4,777 BTU. Supplemental heat for the room you sit in: it takes the edge off a cold evening while the furnace stays turned down. Real coverage depends on your insulation, windows and ceiling height. Our supplemental heat planner puts it in numbers for your room.

20 flame colors. Classic orange for winter evenings, something bolder when friends are over, or just the embers glowing behind a movie. How real each setting looks is for your eyes to judge in the photos and videos; the count is the seller's. Our flame effects guide sorts the settings you'll use from the ones you'll forget.

Living room or bedroom?

For the living room, 50 inches of fire are wide enough to anchor a big wall. All those flame colors are made for showing off when friends come round. The app or Alexa can start the fire before you are even home.

For a bedroom or a study, the timer (up to 8 hours) switches it off after you fall asleep.

On balance it is a living-room centrepiece that can also do a smaller room, not the other way round.

Great for you if…

  • You want the chill off one room on cold evenings
  • You like to change the mood of the room
  • You like to run the living room from your phone

Skip it if…

  • You want the flame on its own in summer: the listing we read doesn't say the flame runs without heat
  • Your wall can't give it 50 in plus the clearances in the manual
  • You want it to replace your heating: it is supplemental heat for one room
  • You'd rather wait for buyer reviews: none are captured for this listing yet

What Marsail promises

The seller states, word for word, in the Marsail 50" App Control (4777 BTU) listing:

  • This electric fireplace from Marsail delivers an impressive 4777 BTU of heat to efficiently warm up an entire room.
  • You can also operate the fireplace with the included remote or easy-to-use control panel, offering maximum convenience and flexibility.
  • The electric fire place offers 20 flame color modes and an automatic color-changing mode, all with stunning crystal effect.
  • Marsail’s electric fireplace operates at a sound level of less than 45 dB to ensure a peaceful environment that doesn’t disturb relaxation or sleep.
  • Wall mounting features a slim, elegant 3.9′′ profile to save space, while recessed mounting requires proper framing in a compatible wall cavity before installation.

Hold these against the manual of the exact model before you order.

Marsail 50" App Control, 4777 BTU, view 3

Size, power and what's in the box

What the Marsail 50" App Control (4777 BTU) listing names:

  • 50 in wide
  • Recessed or wall-mounted
  • Heater: 4,777 BTU
  • Remote, app or WiFi

What the listing names with it: Remote control, Crystal media.

Tick them off on delivery day, before the cardboard goes out.

Check the opening, the depth and the outlet against your wall before you order.

Marsail 50" App Control, 4777 BTU, view 4

Price and cost per inch of width

$239.99 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each stated inch of width costs about $4.80. That puts it in the cheaper third of the 117 inserts we have a price for.

Cost per inch is only a rough yardstick: the heater, the flame options and the build count as much as the width.

The button opens the exact listing (ASIN B0DLL2J999), where today's price, stock and seller apply.

Marsail 50" App Control, 4777 BTU, view 5

A better fit for your room?

Want a wider fire for a bigger wall? The Touchstone Sideline 60" Smart (9.5/10) states 60 in.

Short on wall space? The Innoflame 36" Insert with Log Set (7.7/10) is 36 in wide, per its listing.

Want the flame without the heat in summer? The Xbeauty 60" Recessed and Wall Mounted (9.3/10) states a flame-only mode.

Our take

The verdict

We like the Marsail 50" App Control (4777 BTU) for a 50-inch width and a 4,777 BTU heater. No buyer reviews yet, so this Marsail recessed or wall-mounted fireplace has to win you over on paper. The catch with the Marsail: no flame-only mode in the listing, while most picks here state one. We'd pick it if you want the chill off one room on cold evenings; otherwise, put it next to the Sixfivsevn 36" Recessed and Wall Mounted first.

Living with it

Delivery day

A big, flat box with glass inside: open it with two people and check the front before the cardboard goes out.

The first evening

Run through the flame colors once, then settle on the one that suits the room. The 4,777 BTU heater takes the chill off the room you sit in.

Day to day

The remote on the sofa arm, the timer for bedtime, and a quick dust of the glass now and then. Our maintenance guide has the rest.

Summer

Check whether the flame can run without the heater; the listing we read doesn't say so.

The one thing we'd check first

Before you order the Marsail 50" App Control (4777 BTU): check your wall, because the 50-inch figure has to match your opening, and a listing width can mean the frame or just the viewing area.

Before you buy

Your wall

Draw the opening on the wall with painter's tape at the real size, step back, and check it against the installation drawing. Our recessed installation guide lists the clearances to ask about.

The outlet

Pick the outlet before you pick the finish: a free one close by, nothing heavy on the same circuit, and no extension cord. Our power requirements guide lists the questions to ask.

Heat for your room

4,777 BTU stated. Treat it as supplemental heat for one room. Our supplemental heat planner turns your square footage into a rough answer.

Delivery and install

Glass-fronted inserts are big, flat boxes: plan two people for the unboxing, and decide early who frames the wall. Our built-in vs wall-mounted guide weighs recessed against wall-mounted.

How it compares

How the Marsail 50" App Control (4777 BTU) stacks up against the closest alternative, the Sixfivsevn 36" Recessed and Wall Mounted.

CriterionMarsail 50" App Control, 4777 BTUSixfivsevn 36" Recessed and Wall Mounted
Our rating6.8/106.8/10
Width50 in36 in
Heater4,777 BTU1,500 W
Coverage claimNot stated400 sq ft
Flame colors2012

Both score 6.8/10. The Sixfivsevn 36" Recessed and Wall Mounted adds more stated heat (1,500 W) and a bigger coverage claim (400 sq ft), while the Marsail 50" App Control (4777 BTU) brings a wider unit (50 in) and more flame colors (20).

The score in detail

How we rated it

Spec-based rating on a 4.5–8.5 scale: 4.5 + average of the 4 criteria × 0.4. Capped at 8.5 because no customer evidence is included.

Key specifications

6 / 10

Build, warranty & certifications

3 / 10

Listing documentation

7 / 10

Fit & compatibility

7 / 10

This product has no captured buyer-review record yet, so its rating comes from the documented listing alone: four criteria scored out of 10 (key specifications; build, warranty and certifications; listing documentation; fit and compatibility), placed on a 4.5–8.5 scale. Read the full methodology.

Read the methodology →

Frequently asked questions

Is the Marsail 50" App Control (4777 BTU) any good?

We rate it 6.8/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.

What size and heater output does the Marsail 50" App Control, 4777 BTU state?

Its listing states a 50-inch width, a 4,777 BTU/h heater output and recessed (in-wall) installation. Those are the maker's figures, so check in the installation drawing whether the width means the frame, the firebox or the opening. Our supplemental heat planner puts 4,777 BTU/h in context for your room.

What power supply does the Marsail 50" App Control, 4777 BTU need?

The listing states 4,777 BTU/h. Read the supply, plug and circuit conditions on the exact listing and in the manual before you order, and never run a heater on an extension cord or a shared power strip. Anything beyond an existing standard outlet, hardwiring or 240 V included, is a job for a licensed electrician.

What do you get with the Marsail 50" App Control (4777 BTU)?

Its listing states a 50-inch width, a 4,777 BTU heater, 20 flame colors, app control and a 8-hour timer. Those are the seller's figures; for how real the flames look in a living room and how loud the fan runs at night, the buyer reviews are the better guide.

What should I check before ordering the Marsail 50" App Control (4777 BTU)?

Your wall: draw the opening on the wall with painter's tape at the real size, step back, and check it against the installation drawing. Our recessed installation guide lists the clearances to ask about. The outlet: pick the outlet before you pick the finish: a free one close by, nothing heavy on the same circuit, and no extension cord. Our power requirements guide lists the questions to ask. Heat for your room: 4,777 BTU stated. Treat it as supplemental heat for one room. Our supplemental heat planner turns your square footage into a rough answer. Delivery and install: glass-fronted inserts are big, flat boxes: plan two people for the unboxing, and decide early who frames the wall. Our built-in vs wall-mounted guide weighs recessed against wall-mounted.

Where can I buy the Marsail 50" App Control (4777 BTU)?

We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.

Keep comparing

If the Marsail 50" App Control, 4777 BTU hasn't sold you yet, see where it ranks, read the guides that feature it or browse all built-in & wall-mounted inserts.

Read this before you buy