Electric Fireboxes & Inserts
Electric fireplace insert or built-in electric firebox — this category covers both. If you’re retrofitting an existing masonry opening or mantel, look at plug-in inserts like Dimplex Nova in 23", 26", 28", and 33" with log or crystal media; they slide in, plug into a standard outlet, and bring a convincing fire effect with a fan-forced heater for up to 1,000 sq. ft. of supplemental warmth (that “with blower” benefit shoppers search for).
For framed openings or new construction, built-in fireboxes deliver the traditional hearth look with hardwire options and sizes to match most remodels. The BF Series comes in 33", 39", and 45" with a brick interior, realistic logs, and a powerful fan-forced heater rated for up to 1,000 sq. ft. — great when customers search “fireplace insert electric” and want real heat plus simple controls.
Want the most lifelike look for an electric fireplace insert for existing fireplace? Dimplex Revillusion shows full-depth brick, glowing Realogs, and a lifelike, reflection-free flame view. It’s available in 24", 30", 36", portrait 36", and 42", with Comfort$aver® heat and even 240V capability for up to 8,794 BTU when you need stronger supplemental output.
If you want a modern flame in a classic opening, explore Optimyst inserts and boxes: a three-dimensional, water-mist flame effect with optional heat for a true hearth presence. Models built for hearth retrofits provide discreet supplemental heat (up to around 400 sq. ft.) while keeping the flames available year-round without heat — perfect for ambiance-first projects.
Use the filters to narrow by series (BF, Revillusion, Nova, Optimyst), size (from 23" to 45" and more), and installation (plug-in or built-in). However you shop — “best electric fireplace insert,” “electric fireplace inserts for existing fireplaces,” or “electric fireplace insert with blower” — you’ll find straight answers on heat, fit, and finish here, without the chimney hassle and with the flame control you want.