Sub-Zero CL3650U/S// 21 cu. ft. Built-In
Quick verdict
The Sub-Zero CL3650U/S// 21 cu. ft. Built-In is a 20.8 cu. ft. built-in from Sub-Zero in the premium tier. ENERGY STAR certified at 596 kWh/year, in line with the rest of the built-in class. At about $14,900 the $/cu.ft. runs above peers — the premium goes toward build quality and finishes. Standout features: an ice maker and panel-ready trim. Our reviewers rate it 4.3/5 — best for family sized households.
Best for
- Families of 4-5
- Luxury renovations
- Premium buyers
Key specs
- Capacity
- 20.8 cu. ft.
- Dimensions
- 36.0" × 84.0" × 24.5"
- Annual energy
- 596 kWh/year
- Ice / Water
- Ice ✓ · No water
- Wi-Fi
- No
Our Review
The Sub-Zero CL3650U/S// 21 cu. ft. Built-In is a 20.8 cu. ft. built-in refrigerator from Sub-Zero, sitting in the premium ($3,500+) range. With a 14.6 cu. ft. fresh-food compartment and 6.2 cu. ft. of freezer space, it's positioned for families of 4-5.
What stands out
Build quality is the headline. Sub-Zero models use metal drawer rails, soft-close hinges, and consistent interior LED lighting that you don't get in the mainstream tier. Door seals are noticeably more substantial — a small detail that translates to better long-term temperature stability.
Layout and capacity
Exterior dimensions are 36.0" W × 84.0" H × 24.5" D — check your opening, especially the depth with handles extended. Total useable capacity is 20.8 cu. ft., split 14.6 fresh / 6.2 freezer.
Bottom line
For shoppers who plan to own a fridge for 15+ years and value build quality and design over headline features, the Sub-Zero CL3650U/S// 21 cu. ft. Built-In earns the premium it asks for.
Full Specs
Capacity Total capacity | 20.8 cu. ft. |
|---|---|
| Fresh-food | 14.6 cu. ft. |
| Freezer | 6.2 cu. ft. |
Dimensions Width | 36.0" |
| Height | 84.0" |
| Depth | 24.5" |
| Depth (with handles) | 27.0" |
Energy ENERGY STAR | Yes |
| Annual energy use | 596 kWh/year |
| Est. annual cost | $95 |
Features Ice maker | Yes |
| Water dispenser | No |
| Wi-Fi connected | No |
| Smart features | No |
| Door style | Built-In |
| Finishes available | Stainless Steel, Custom Panel-Ready |
| Noise level | — |
Pros & Cons
+Pros
- ✓Integrates seamlessly with cabinetry for a true luxury feel
- ✓ENERGY STAR certified for lower annual operating cost
- ✓Automatic ice maker keeps the bin stocked without trays
- ✓Premium build quality with full-extension drawers and metal trim
–Cons
- ✕Premium price — expect to pay a meaningful step up over mainstream brands
- ✕Requires professional installation and cabinet planning
Rating Breakdown
Where to Buy
| Retailer | Current Price | |
|---|---|---|
| Home Depot | See retailer | Shop at Home Depot |
| Best Buy | See retailer | Shop at Best Buy |
| Lowe's | See retailer | Shop at Lowe's |
Prices and availability vary by region. We may earn a commission on purchases at no cost to you — see our disclosure & methodology. Affiliate relationships do not influence ratings.
