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 number | W100-121 | Retailer |
|---|---|---|
| Power | Corded Electric | Retailer |
| Dimensions (seller) | 8.75"D x 31.25"W x 24.13"H | Retailer |
| Material | Glass, Metal | Retailer |
| Mounting / installation | Insert | Retailer |
| Heat output (maker) | 5,100 BTU/h | Retailer |
| Features (seller) | Infrared | Retailer |
| Product weight | 43 lb | Retailer |
| Model name | Entertainment Accessories | Retailer |
| Warranty | One year limited manufacture's warranty. | Retailer |
| Heats up to (maker) | 1,000 sq ft | Retailer |
| Wattage | 1,500 W | Retailer |
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
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.
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Questions about this model
How much heat does the Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert give?
Can the Signature Design by Ashley W100-121 31-Inch Electric Fireplace Insert share a circuit?
Bottom line
Best suited to converting an unused fireplace.



