Electric insert ยท Signature Design by Ashley

Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert

31-inch electric insert, 1,500 W

Heats up to (maker)
1,000 sq ft
Heat output (maker)
5,100 BTU/h
Wattage
1,500 W
Material
Glass, Metal
Dimensions (seller)
8.75"D x 31.25"W x 24.13"H
Product weight
43 lb
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In short

Best suited to converting an unused fireplace.

Wins
5,118 BTU/h of heat.
Gives ground
Supplemental heat only.
Suits
Converting an unused fireplace.

Updated October 2026

What you get

The Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert is an electric insert with a 1,500-watt heater, which works out to about 5,118 BTU per hour (3.412 BTU per watt).

On a 120-volt outlet that draws about 12.5 amps, most of a standard 15-amp circuit, so other loads on the circuit can trip the breaker. Plug it straight into the wall as the manual directs.

The maker says it heats up to 1,000 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 8.75 in (D) x 31.25 in (W) x 24.13 in (H), a shipping or unit weight of 43 lb and glass, metal construction.

Warranty, per the listing: One year limited manufacture's warranty.

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 numberW100-121Retailer
PowerCorded ElectricRetailer
Dimensions (seller)8.75"D x 31.25"W x 24.13"HRetailer
MaterialGlass, MetalRetailer
Mounting / installationInsertRetailer
Heat output (maker)5,100 BTU/hRetailer
Features (seller)InfraredRetailer
Product weight43 lbRetailer
Model nameEntertainment AccessoriesRetailer
WarrantyOne year limited manufacture's warranty.Retailer
Heats up to (maker)1,000 sq ftRetailer
Wattage1,500 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

  • 5,118 BTU/h of heat
  • No vent or chimney
  • Flame runs without heat

Gives ground

  • Supplemental heat only
  • Draws 12.5 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 Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert give?
About 5,118 BTU per hour on its 1,500-watt setting, since each watt gives 3.412 BTU per hour.
Can the Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert share a circuit?
It draws about 12.5 amps at 120 volts on high, most of a 15-amp circuit; the manual says how to connect it.

Bottom line

Best suited to converting an unused fireplace.