COSMO COS-30EDWC Haven Double Wall Oven
- Capacity: 5 cu ft
- Heating Method: Convection
- Installation Type: Wall Mount
- Wattage: 4800 watts
Last refreshed Jun 13, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A capacious double convection oven that cooks fast once dialed in, but budget time for calibration and inspect it closely on delivery.
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ASIN: B0843PMK78Model: COS-30EDWCCategory: Double Wall Ovens
Overview
A 30 inch double electric wall oven from Cosmo's Haven Collection, pairing a 5 cu ft true European convection oven on top with a 5 cu ft standard-bake oven below, self-cleaning, in stainless steel with a blue porcelain interior.
Hardwired at 240V and 4800 watts, this is built for a kitchen remodel rather than a drop-in swap.
- Two 5 cu ft ovens, top with true convection
- 7 cooking functions on the upper oven
- Automatic self-clean cycle
- Hardwired 4800W, 240V connection
Who it's for
Households remodeling a kitchen who want two full-size ovens for entertaining and can arrange a 240V hardwire connection and custom cabinet. Not a fit for anyone wanting a simple plug-in replacement.
Pros and cons
- Two 5 cu ft cavities handle multiple dishes or a crowd-size meal
- Convection roast browns and cooks food quickly per owners
- Self-clean and a hidden bake element ease upkeep
- Multiple reports of shipping damage including broken glass and dented doors
- Some units run noticeably hotter than the set temperature and need recalibration
- Large doors mean stepping aside to load and unload hot dishes
Performance notes
True European convection circulates heat to cook at roughly 25 degrees cooler and about 10 percent faster than a standard oven, with automatic convection conversion so recipes don't need manual adjustment. The top oven offers seven functions including proof and convection roast.
Specifications
| Brand | COSMO |
|---|---|
| Model | COS-30EDWC |
| Dimensions & fit | |
| Door Orientation | Side |
| Item Weight | 236.5 poundslower than 68% of 29 double wall ovens |
| Item Dimensions D x W x H | 23.5 × 29.9 × 51.2 inches |
| Capacity & performance | |
| Capacity | 5 cu ftlower than 88% of 42 double wall ovens |
| Heating Method | Convection |
| Defrost System Type | Electric Defrost |
| Power & efficiency | |
| Wattage | 4800 wattslower than 87% of 24 double wall ovens |
| Fuel Type | Electric |
| Voltage | 240 volts |
| Construction & materials | |
| Material Type | Stainless Steel, Enamel-Coated Steel |
| Color | Stainless Steel |
| Finish Types | Stainless Steel |
| Compatibility & installation | |
| Installation Type | Wall Mount |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Timer Function | Timer Function Available |
Closest rivals on specs
SAMSUNG NV51K7770DG Flex Duo Smart Double Wall Oven- Item Weight 236.5 vs 273 pounds (-13%)
Frigidaire FCWD2727AB Double Wall Oven 27 Inch- Capacity 5 vs 7.6 cu ft (-34%)
GE JKD5000DNBB Convection Double Wall Oven 27 Inch- Capacity 5 vs 8.6 cu ft (-42%)
- Wattage 4800 vs 2600 watts (+85%)
Frequently asked questions
Does the Cosmo COS-30EDWC need a special electrical hookup?
Yes, it is hardwired and requires a 4800 watt, 240V circuit, plus a cabinet cut for its 29.87 x 23.5 x 51.18 inch dimensions.
Does the top oven run hotter than the dial setting?
Some owners report it does and had to adjust the built-in calibration setting; one reviewer notes the calibration direction feels counterintuitive and is not explained in the manual.
Is the COS-30EDWC self-cleaning?
Yes, both the convection details and owner reports confirm an automatic self-clean cycle that burns off spills at high heat.