Electric Fireplaces
Best 18x18 Electric Fireplace Insert (2026): Our 3 Picks Ranked
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For an 18x18 opening, the Giantex 18 inch insert leads this list: it offers 2 heat settings up to 1500W, 5 brightness modes, a remote and a thermostat. The Tangkula runner-up adds 9 flame colors and coverage rated for up to 400 sq ft by the maker, while the ROVSUN adds app control with 6 flame colors.
Starting out? See the main guide: Best Electric Fireplace
Top picks at a glance
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Best OverallGiantex 18" Electric Fireplace Insert Heater9.8 View on Amazon -
9.3 View on Amazon -
9.2 View on Amazon
Compare the specs
Ranked on flame colors, remote control, timer, adjustable thermostat, coverage (maker's figure), overheat protection from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Flame colors | Remote control | Timer | Adjustable thermostat | Coverage (maker's figure) | Overheat protection | Wattage | Weight | Warranty |
|---|---|---|---|---|---|---|---|---|---|
| 1. Giantex 18" Electric Fireplace Insert Heater | — | Yes | Yes | Yes | — | Yes | 1,500 W | 17 lb | — |
| 2. Tangkula 18 Inches Electric Fireplace Insert | 9 colors | Yes | Yes | Yes | 400 sq ft | Yes | 1,400 W | 13 lb | — |
| 3. ROVSUN 18" Electric Fireplace Inserts with APP | 6 colors | Yes | Yes | — | — | Yes | 1,400 W | — | — |
Giantex 18" Electric Fireplace Insert Heater
It pairs 2 heat settings up to 1500W with 5 brightness modes, a remote, a thermostat and overheat protection.
- Remote control
- Timer
- Adjustable thermostat
- Overheat protection
- Wattage: 1,500 W
Good for
- Buyers who want 2 heat settings up to 1500W
- Buyers who want 5 brightness modes and flame without heat
Skip it if
- You need more than 5 brightness modes
- You need a heat setting above 1500W
The low mode runs at 750W (2559 BTU) and the high mode at 1500W (5118 BTU), with a thermostat that adjusts from 62 to 95 degrees. The flame offers 5 brightness modes and runs without heat, and the unit is operated manually or with the included remote. It carries ETL certification with overheat protection and weighs 17 lb.
Tangkula 18 Inches Electric Fireplace Insert
It pairs 9 flame colors with coverage rated for up to 400 sq ft by the maker, a remote and a thermostat.
- Flame colors: 9 colors
- Remote control
- Timer
- Adjustable thermostat
- Coverage (maker's figure): 400 sq ft
- Overheat protection
- Wattage: 1,400 W
Good for
- Buyers who want 9 flame colors with an auto cycle mode
- Buyers who want coverage rated for up to 400 sq ft
Skip it if
- You need coverage rated past 400 sq ft
- You need more than 9 flame colors
It delivers 5000 BTU for spaces up to 400 sq ft, with a thermostat that adjusts from 62 to 82 degrees. The flame offers 9 colors with an auto cycle mode and 5 brightness levels, and it runs without heat. The remote adjusts power, flame, heat, temperature and a timer from 30 minutes to 8 hours, and the unit works freestanding or recessed. It weighs 13 lb.
ROVSUN 18" Electric Fireplace Inserts with APP
It pairs app control with 6 flame colors, 5 brightness levels, a remote and overheat protection.
- Flame colors: 6 colors
- Remote control
- Timer
- Overheat protection
- Wattage: 1,400 W
Good for
- Buyers who want app control plus a remote
- Buyers who want 6 flame colors and 5 brightness levels
Skip it if
- You need more than 6 flame colors
- You need a heat setting above 1400W
The temperature range runs from 62 to 82 degrees, with the heat vent on the top middle front area. The flame offers 6 colors and 5 brightness settings, and it runs without heat for all-season use. Control comes from the remote, the control panel or the Smart mobile app, with an 8H timer. It carries ETL certification with overheat protection and automatic shutoff when tilted more than 45 degrees.
How to choose
Match width and opening size
Start with the stated width and the opening it must fit. The Giantex and Tangkula are 18 inch inserts, and the ROVSUN is an 18 inch wide unit. The Tangkula measures 19.17 by 5.12 by 16.93 inches overall, so measure the cabinet or wall opening before ordering. The Tangkula also needs its air inlet 2 inches away from the board or wall when recessed.
Heat settings and coverage
Compare wattage and coverage together. The Giantex offers 750W and 1500W settings, with 2559 BTU on low and 5118 BTU on high. The Tangkula runs at 1400W with 5000 BTU for spaces up to 400 sq ft, and the ROVSUN runs at 1400W. Thermostats adjust from 62 to 95 degrees on the Giantex and from 62 to 82 degrees on the Tangkula and ROVSUN, so match the range to the room.
Flame, controls and upkeep
Flame options differ across the three. The Giantex offers 5 brightness modes, the Tangkula offers 9 flame colors with 5 brightness levels, and the ROVSUN offers 6 flame colors with 5 brightness settings. All three run the flame without heat, and all three come with a remote; the ROVSUN adds app control. For upkeep, check the timer and thermostat settings before each season, and keep the air inlet clear on recessed installs.
FAQ
What size opening fits an 18 inch electric fireplace insert?
Match the stated 18 inch width to the opening, and check overall dimensions where given. The Tangkula measures 19.17 by 5.12 by 16.93 inches overall.
Do these fireplace inserts have remotes and timers?
Yes. All three come with a remote and a timer function. The Tangkula timer runs from 30 minutes to 8 hours, and the ROVSUN has an 8H timer.
How many flame colors do these inserts offer?
The Tangkula offers 9 flame colors and the ROVSUN offers 6 flame colors, while the Giantex offers 5 brightness modes.
