COSMO Stellar COS-RGS366SS Gas Range 36 Inch
- 6.1 cu. ft. convection oven with air fry mode
- 6 sealed gas burners on cast iron grates
- 22,000 BTU top burner, then 18,000, two 12,000 and 6,000 BTU
- 3,500 BTU low burner for simmering
- Liquid propane conversion kit sold separately
- 120 Volts electrical connection
- 27.76"D x 35.86"W x 37.83"H, CSA listed
- 1 year limited warranty
Last refreshed Jun 13, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A capable gas range for cooks who want a wide spread of burner outputs and air fry in the oven. The warranty is short, and the propane conversion kit is sold separately.
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ASIN: B0G3YNCDXKModel: COS-RGS366SSCategory: Freestanding Ranges
Overview
Cosmo built this Stellar Collection gas range around sealed burners on cast iron grates and a single convection oven with an air fry function. A steam clean cycle softens baked-on residue, and the cooktop runs from a high-output burner down to a low simmer burner.
Burner output runs from a fierce searing burner to a gentle simmer ring, which covers fast boiling and delicate sauces on one top. Convection and air fry broaden what the oven handles. Weight is not listed, and propane households need to order a conversion kit separately.
Who it's for
Busy households cooking on gas, with several pans running at different heats, get the most from it. Homes with only an electric hookup should look at an electric or induction model instead.
Pros and cons
- Wide spread of burner outputs
- Cast iron grates
- Convection fan for even baking
- Air fry function in the oven
- Propane conversion kit sold separately
- Weight not listed
- Short limited warranty term
- Included list names only install kit and manuals
Performance notes
Sealed burners limit how far spills travel under the cooktop, so cleanup stays on the surface. Gas responds the moment a knob turns, which makes the low burner useful for sauces. In the oven, a convection fan moves heated air to even out browning, and air fry depends on the tray letting air reach the food from below.
Specifications
| Brand | Cosmo |
|---|---|
| Model | COS-RGS366SS |
| Dimensions & fit | |
| Item Dimensions D x W x H | 27.8 × 35.9 × 37.8 inches |
| Range width | 36 inches |
| Capacity & performance | |
| Capacity | 6.1 cu ft |
| Heating Element | Sealed |
| Number of Heating Elements | 6 |
| Burner output | 22000 |
| Power & efficiency | |
| Voltage | 120 volts |
| Construction & materials | |
| Material Type | Stainless steel |
| Finish Types | Stainless steel |
| Compatibility & installation | |
| Installation Type | Slide-In |
| Included components | |
| Included Components | Installation Kit, Install & User Manuals |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Form Factor | Single Oven |
| Number Of Racks | 2 |
| Control Type | Knob |
| Drawer Type | Storage |
| Specification Met | CSA |
| Oven features | Convection, air fry, steam clean |
| Grates | Cast iron |
Frequently asked questions
How do I clean the oven of the Cosmo COS-RGS366SS?
Use the steam clean function. It loosens baked-on residue with heat and moisture so spills wipe away. The stainless steel finish is listed as easy to clean for everyday wipe-downs.
Does the Cosmo COS-RGS366SS include an air fry tray?
The description says it comes with an air fry tray, but the included components list names only an installation kit and manuals. Confirm with the seller.
Is the COS-RGS366SS freestanding or slide-in?
The listing gives the installation type as slide-in.
Does the Cosmo COS-RGS366SS need an electrical outlet?
Yes. The listing specifies a 120 Volt connection alongside the gas supply, so the install spot needs both.