The best 23-inch fireplace insert depends on your opening size, preferred heating controls, and desired flame effects. The PRETZI is a feature-rich option with two heat settings and multiple flame adjustments; the Tangkula curved model is designed for a compact opening; and the Innoflame specifies furniture-opening dimensions for a built-in look. A second Tangkula model adds infrared quartz heating, while the 26-inch model is an alternative to consider only if its larger size fits your space.
| Product | Best For | Standout Features |
|---|---|---|
| PRETZI 23-Inch Insert | Adjustable flame and heat | 750W/1500W, seven flame colors, timer |
| Tangkula Curved 23-Inch Insert | Compact openings | Curved glass, thermostat, two heat settings |
| Tangkula Infrared Quartz Insert | Flame variety and thermostat control | Infrared quartz, six flame options, child lock |
| Innoflame 23-Inch Insert | Specified furniture cutouts | Rear mounting, log set, remote |
| 26-Inch Electric Fireplace Insert | Buyers considering a larger insert | 1400W, log set, four brightness levels |
PRETZI 23-Inch Electric Fireplace Insert
Best for: Buyers who want several flame and heat adjustments in one insert. The PRETZI offers 750W and 1500W heating options, five flame brightness levels, adjustable flame speed, and seven flame colors. Its flame effect can operate without heat, which is useful when you want the visual effect outside the heating season.
The listed dimensions are 5.11 inches deep, 24.41 inches wide, and 18.11 inches high. The product listing says it can heat areas up to 400 square feet and includes an eight-hour timer, remote, and control panel. It was selected for its combination of flexible controls and clearly stated size.
Limitation: Its listed width is greater than 23 inches, so check the full product dimensions against the installation opening before ordering.
Tangkula Curved 23-Inch Fireplace Insert
Best for: Buyers fitting an insert into a compact opening who want a curved-glass view. The listed insert dimensions are 25.1 by 8.3 by 20.9 inches, and it is designed to slide into an opening measuring 22.3 inches wide, 8.4 inches deep, and 20.7 inches high. Measure carefully: the insert’s overall width and its stated opening width are different.
This model offers 750W and 1500W heat settings, a thermostat range of 62°F to 82°F, three flame colors, and six brightness levels. The flame can run without heat, and the listing states heating coverage of up to 400 square feet. It was selected for its stated opening dimensions and adjustable ambiance.
Limitation: Confirm both the cavity dimensions and clearance before purchase; the listed opening is specific to this model.
Tangkula 23-Inch Infrared Quartz Insert
Best for: Buyers who prioritize flame choices and temperature control. This 1500W model combines a heating resistor wire with an infrared quartz tube. It offers six flame options, five brightness levels, and a thermostat range of 60°F to 99°F. The flame effect can also be used without heat.
The listing states a 5120 BTU output and claims heating coverage up to 1,000 square feet. It includes overheat protection and a child lock, activated by holding the timer button for six seconds. These controls make it a useful comparison for households seeking more settings than a basic insert provides.
Limitation: The provided product details do not include the insert’s overall or required opening dimensions, so verify fit with the seller before buying.
Innoflame 23-Inch Fireplace Insert
Best for: Buyers whose furniture opening matches the specified mounting dimensions. The product calls for a front opening of 23 by 19¾ inches and a minimum rear opening of 24 by 20 3/16 inches. It mounts from the rear and slides forward into the cavity for a flush-front appearance.
The Innoflame includes a log set, dancing flame effect, four brightness settings, remote, and control panel. Its thermostat range is 64°F to 82°F, and the listing states 5000 BTU output for rooms up to 400 square feet. It was selected for shoppers who need clearly listed furniture-opening measurements.
Limitation: The required rear opening is wider than the stated front opening; measure both before choosing this insert.
26-Inch Electric Fireplace Insert
Best for: Buyers comparing a slightly larger alternative to a 23-inch insert. The product name lists a 1400W heater, remote, log set, four flame-brightness settings, an eight-hour timer, and overheating protection. These features make it relevant if the desired look and controls matter more than an exact 23-inch size.
Limitation: This is a 26-inch model, not a 23-inch insert, and the supplied product details do not specify its installation dimensions or heating coverage. Do not choose it without checking the full measurements.
Buying Guide: How to Choose a 23-Inch Fireplace Insert
Will it fit your fireplace opening?
Measure the opening’s width, height, and depth, and compare those numbers with the insert’s stated dimensions. Check whether the listing distinguishes the insert’s exterior size from the required cavity size. Furniture-mounted models may also specify separate front and rear openings. Allow for any installation clearance required by the product instructions.
Which heat settings and controls matter?
Compare wattage options, thermostat ranges, timers, remote controls, and control panels. A 750W/1500W model provides two listed heat settings, while a single-wattage product may offer fewer options. Heating-area claims vary by listing and are not directly comparable without room conditions and installation details.
Do you want flames without heat?
Several listed models allow the flame effect to run without heating. This feature is useful when you want the visual effect in warmer weather. Compare flame colors, brightness levels, and adjustable speed if those settings are important to your room.
What safety features should you compare?
Review the product’s stated protections, such as overheat protection or a child lock, and follow the included installation and operating instructions. A listed safety feature does not replace checking clearances, electrical requirements, and proper use.
Frequently Asked Questions
Is a 23-inch fireplace insert exactly 23 inches wide?
Not necessarily. A model described as 23 inches may have a different exterior width or require a larger opening. Check the product’s full measurements before ordering.
Can an electric fireplace insert run without heat?
Several products in this selection list a flame-only mode. Confirm that feature in the specific model’s details if year-round flame display matters to you.
How much area can these inserts heat?
Coverage claims differ by product. The listings here state up to 400 square feet for some models and up to 1,000 square feet for one Tangkula model. Treat these as manufacturer claims, not a guarantee for every room.
Should I choose a 23-inch or 26-inch insert?
Choose by measured opening size, not appearance alone. The 26-inch model is an alternative only if its dimensions suit the intended space; its supplied details do not include full installation measurements.