Electric insert ยท Electactic

Electactic L250 21-Inch Electric Fireplace Insert

21-inch electric insert, 750 W

Heats up to (maker)
450 sq ft
Heat output (maker)
5,100 BTU/h
Wattage
750 W
Material
Resin Logs with Ember Bed
Dimensions (seller)
8.56"D x 20.53"W x 11.51"H
Product weight
15.4 lb
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In short

Built for converting an unused fireplace.

Wins
2,559 BTU/h of heat.
Gives ground
Supplemental heat only.
Suits
Converting an unused fireplace.

Updated October 2026

What you get

The Electactic L250 21-Inch Electric Fireplace Insert is an electric insert with a 750-watt heater, which works out to about 2,559 BTU per hour (3.412 BTU per watt).

At 750 watts it uses about 0.8 kWh an hour on high and draws 6.2 amps at 120 volts; keep it on a circuit without other big loads. Price it at your electricity rate.

The maker says it heats up to 450 square feet; as with any 120-volt heater, read that as supplemental heat for one room.

Like most electric fireplaces the flame effect can run with the heater off, using far less power.

As an insert it slides into an existing fireplace opening; measure the opening width, height and depth against the body dimensions, and the face against the trim. How to measure.

No combustion means no venting, no gas line and no carbon monoxide, which is why they go into bedrooms and apartments.

Also on the listing: overall dimensions of 8.56 in (D) x 20.53 in (W) x 11.51 in (H), a shipping or unit weight of 15.4 lb and resin logs with ember bed construction.

The figures, from the maker

Each figure is the maker's or the listing's own, with its source marked. A figure the maker doesn't give is shown as not stated.

Model numberL250Retailer
PowerCorded ElectricRetailer
Dimensions (seller)8.56"D x 20.53"W x 11.51"HRetailer
MaterialResin Logs with Ember BedRetailer
Mounting / installationFreestandingRetailer
Heat output (maker)5,100 BTU/hRetailer
Features (seller)Adjustable Flame, Adjustable Thermostat, Overheat Protection, Safety Shut OffRetailer
Product weight15.4 lbRetailer
Model nameelectric fireplace insertRetailer
Heats up to (maker)450 sq ftRetailer
Wattage750 WRetailer

Is it the right heater for the room?

Pick it when

  • Converting an unused fireplace
  • Rooms where gas or wood can't go

Pass on it when

  • Heating a whole house
  • Circuits already near their limit

Where it wins, where it gives ground

Wins

  • 2,559 BTU/h of heat
  • No vent or chimney
  • Flame runs without heat

Gives ground

  • Supplemental heat only
  • Draws 6.2 A on high

Know before you install

  • Figures are the maker's own and are rated in the maker's conditions. Installation, venting, chimney, gas and electrical work follow the manual and local code, carried out by a qualified installer.

Heaters to weigh against it

Other electric fireplaces and stoves in the same heat range

Every electric fireplaces and stoves on one chart

Buying this model

The button opens this exact model's listing. Prices and stock change, and installation parts are usually sold separately; check the box contents and the manual's venting list before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions about this model

How much heat does the Electactic L250 21-Inch Electric Fireplace Insert give?
About 2,559 BTU per hour on its 750-watt setting, since each watt gives 3.412 BTU per hour.
Can the Electactic L250 21-Inch Electric Fireplace Insert share a circuit?
It draws about 6.2 amps at 120 volts on high, most of a 15-amp circuit; the manual says how to connect it.

Bottom line

Built for converting an unused fireplace.