COSMO COS-ERD304K-BK Stellar Electric Range 30 in
- Capacity: 4.9 cu ft
- Heating Element: Radiant
- Number Of Heating Elements: 4
- Installation Type: Slide-In
Last refreshed Jun 13, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A well-liked, straightforward range for buyers who want convection and a modern black finish without paying for smart features, though the lack of self-cleaning is worth weighing.
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ASIN: B0F77H87XJModel: COS-ERD304KCategory: Freestanding Ranges
Overview
The Cosmo COS-ERD304K-BK is a 30-inch electric range in matte black, pairing a 4-burner glass cooktop with dual-element burners and a 4.9 cu ft convection oven for bake, broil, roast, and defrost.
There is no wifi or smart home layer here, just a straightforward range with convection alongside conventional bake and broil, which several owners specifically appreciated. Safety features include triple-thick oven glass, a cool-to-touch handle, and a ventilation system meant to dissipate heat around the cavity.
- 4-burner black glass cooktop with dual-element front burners
- 4.9 cu ft convection oven with bake, broil, roast, and defrost
- Triple-thick oven glass and cool-to-touch handle for safety
- Matte black finish with a 1-year limited warranty
Who it's for
Buyers wanting a solid, no-frills 30-inch electric range with a modern matte black look and true convection, who do not need app connectivity or a self-cleaning cycle.
Pros and cons
- Dual-element front burners give large and small ring options
- True convection improved both meals and baking per owners
- Triple-thick oven glass and a cool-to-touch handle
- Simple installation with no smart home setup required
- No self-cleaning oven cycle
- Requires a dedicated 240V, 3-wire or 4-wire circuit not included
- One buyer's initial unit arrived damaged, though replaced quickly
Performance notes
The two front burners each combine a large and small heating element for flexibility between big pots and small pans, while the two rear burners are single elements sized for smaller cookware. The convection fan circulates hot air through the 4.9 cu ft cavity for more even results across bake, broil, roast, and defrost settings than a conventional oven alone.
Specifications
| Brand | Cosmo |
|---|---|
| Model | COS-ERD304K |
| Dimensions & fit | |
| Item Weight | 148.4 pounds |
| Item Dimensions D X W X H | 27.6 × 29.9 × 37 inches |
| Capacity & performance | |
| Capacity | 4.9 cu fthigher than 55% of 122 freestanding ranges |
| Heating Element | Radiant |
| Number Of Heating Elements | 4 |
| Power & efficiency | |
| Voltage | 240 voltshigher than 58% of 89 freestanding ranges |
| Construction & materials | |
| Material Type | Stainless Steel |
| Finish Types | Matte |
| Compatibility & installation | |
| Installation Type | Slide-In |
| Smart Home Compatibility | Not Smart Home Compatible |
| Included components | |
| Unit Count | 1 |
| Included Components | Rear Vent Trim, Oven Racks, Anti-Tip Bracket |
| Warranty & support | |
| Warranty Description | 1 Year |
| Other details | |
| Form Factor | Single Oven |
| Control Type | Knob |
| Drawer Type | Storage |
| Number Of Racks | 2 |
| Item Type Name | 30 In. Stellar Collection 4.9 Cu. Ft. Electric Range With 4 Burner Glass Cooktop And Convection Oven In Matte Black |
| Specification Met | ETL |
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Frequently asked questions
Does the Cosmo COS-ERD304K-BK have wifi or smart controls?
No, per the listing it has no smartphone or wifi connectivity, just conventional and convection bake, broil, roast, and defrost settings.
What electrical circuit does the COS-ERD304K-BK need?
It requires a 240V, 60Hz circuit with 3-wire or 4-wire hookup, and the cord is not included.
Does this Cosmo range self-clean?
No, owners note the lack of a self-cleaning cycle as one of its few drawbacks.