Sub-Zero Classic 48-inch Side-by-Side Refrigerator/Freezer review
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- Split Climate intelligent cooling (dual refrigeration)
- NASA-inspired air purification
- ClearSight LED lighting with Night Mode
- Automatic ice maker with Max Ice mode
- Star-K certified
Sub-Zero · Refrigerator · Side-by-side
$14,065-$15,920 list price
- $14,065-$15,920 MSRP
- 48″ wide
- 2-yr full warranty
- Total capacity (cu ft): 29.1
- Refrigerator (cu ft): 18.7
The Sub-Zero Classic 48-inch side-by-side (CL4850S) is the safe default for a big family kitchen that wants one built-in fridge it never has to think about. On paper you get 29.1 cubic feet, split 18.7 fresh and 10.4 frozen, two independent cooling systems, and the longest sealed-system coverage in this class. List price runs about $14,065 to $15,920 depending on finish. The trade-offs: you pay a premium for the badge, and a side-by-side is less flexible than a column pair.
Best for: Busy families · Large kitchens · Entertainers
What we like
- Split Climate dual refrigeration keeps fridge and freezer air separate
- 10.4 cu ft freezer is generous for a 48-inch opening
- Stainless (tubular or pro handle) or panel-ready
- 5-year full and 12-year limited sealed-system coverage
- Wi-Fi app for remote temperature checks and diagnostics
Watch out for
- Value is the weak spot; Monogram's 48-inch lists for about the same
- Not Energy Star rated
- Narrow side-by-side sections are awkward for sheet pans and platters
Design and build
Classic is Sub-Zero's framed, unmistakable look: 84 inches tall at a 24-inch depth, so it sits flush with standard cabinets instead of jutting out like a freestanding fridge. Choose stainless with a tubular handle, stainless with a pro handle, or the panel-ready CL4850S/O if you want it to disappear into cabinetry. ClearSight LED lighting adds a Night Mode, and the unit is Star-K certified.
Want water and ice through the door? The dispenser variants (CL4850SD and CL4850SID) give up a little room, landing at 28.4 and 28.8 cubic feet.
Performance on paper
The headline is Split Climate, Sub-Zero's dual refrigeration: the fresh-food and freezer sides are cooled separately, so freezer air never passes over your produce. That design is aimed at steadier humidity, less freezer burn and ice that doesn't pick up fridge odors. NASA-inspired air purification works on the fresh side.
Capacity is honest for the width. 18.7 cubic feet of refrigerator handles a family's weekly shop, and a 10.4-cubic-foot freezer is big enough that most households can skip the garage chest freezer. The ice maker has a Max Ice mode for party days.
Who it's for (and who should skip it)
Buy it if you have a family, entertain often and want a single 48-inch opening to do everything. Skip it if you cook mostly fresh and want a wider fridge zone; a pair of 30-inch columns gives you more refrigerator and a separate freezer. Skip it too if value matters more than the name.
Measure first, too: at 84 inches tall it needs a full-height opening, and a panel-ready install needs the cabinetry planned around it from the start.
Price, warranty and service
List price is about $14,065 for panel-ready and up to $15,920 for stainless with a tubular handle. Retailers don't display Sub-Zero prices because of minimum advertised pricing, so savings come from dealer packages, not markdowns. Coverage is 2 years full on the whole unit, 5 years full on the sealed system and 12 years limited on sealed-system parts. It's built in Fitchburg, Wisconsin, per Abt. As with any built-in, a strong local authorized service tech matters more than the brochure.
How it compares
The closest rival is the Monogram 48-inch built-in side-by-side, with a bigger 12.34-cubic-foot freezer at nearly the same list price; see Sub-Zero vs Monogram. Weighing Viking instead? Read Sub-Zero vs Viking refrigerators. For the full field, see our best built-in refrigerators or the luxury refrigerator hub, and price it with a range through a package quote.
Our verdict
The Sub-Zero Classic 48 is the low-risk pick for a family that wants one big built-in with separate freezer cooling and the longest sealed-system coverage in its class. It isn't a bargain or the most flexible layout, but every spec points at the core job: keeping food fresh.
Specifications
| Model numbers | CL4850S/S/T, CL4850S/S/P, CL4850S/O |
|---|---|
| Width | 48″ |
| Installation | Built-in |
| Total capacity (cu ft) | 29.1 |
| Refrigerator (cu ft) | 18.7 |
| Freezer (cu ft) | 10.4 |
| Height (in) | 84 |
| Depth (in) | 24 |
| ENERGY STAR | No |
| Finishes | stainless steel (tubular handle), stainless steel (pro handle), panel-ready |
| Wi-Fi / app | Yes-Sub-Zero Owner's App (Wi-Fi remote temp & diagnostics) |
| Warranty | 2-year full (parts & labor) on entire product; 5-year full sealed system; 12-year limited sealed-system parts |
| Made in | USA (Fitchburg, Wisconsin, per Abt listing) |
| List price | $14,065-$15,920 |
Specs and prices checked Oct 7, 2026 against Sub-Zero’s site and authorized retailers. Configurations, panels and installation change the price: confirm with a dealer. How we rate.
Questions about the Sub-Zero Classic 48-inch Side-by-Side Refrigerator/Freezer
Is the Sub-Zero 48-inch side-by-side worth the money?
It is if you value dual refrigeration, long sealed-system coverage and resale appeal. Monogram's 48-inch matches its capacity for nearly the same list price, so you're mainly paying for Sub-Zero's cooling design and reputation. Compare dealer packages for both before deciding.
Does the Sub-Zero CL4850S have an ice and water dispenser?
The standard CL4850S has an automatic ice maker with Max Ice mode but no door dispenser. Sub-Zero sells dispenser versions, CL4850SD and CL4850SID, at 28.4 and 28.8 cubic feet. Pick based on whether a clean door face or convenience matters more.
Is there a panel-ready Sub-Zero 48 side-by-side?
Yes. The CL4850S/O is panel-ready and is also the lowest-priced configuration, at about $14,065 list. Budget separately for custom panels from your cabinetmaker. The stainless versions come with a tubular or pro-style handle if you'd rather show the appliance off.
Head-to-head comparisons
- Sub-Zero vs Monogram (2026): 48-Inch Fridges Compared
- Thermador vs Sub-Zero Refrigerators (2026): Which to Buy
- Sub-Zero vs Viking (2026): 48-Inch Refrigerators Compared
Where it ranks
- Best overall - The Best Built-In Refrigerators for a Luxury Kitchen
- Best warranty - The Best Panel-Ready Refrigerators for a Seamless Kitchen
Similar refrigerators to consider
| Spec | Sub-Zero Classic 48-inch Side-by-Side Refrigerator/Freezer | Monogram 48-inch Smart Built-In Side-by-Side Refrigerator | Viking Professional 5 Series 48-inch Built-in Side-by-Side Refrigerator/Freezer |
|---|---|---|---|
| Brand | Sub-Zero | Monogram | Viking |
| Category | Refrigerator (side-by-side) | Refrigerator (side-by-side) | Refrigerator (side-by-side) |
| Width | 48″ | 48″ | 48″ |
| Fuel | - | - | - |
| Installation | Built-in | Built-in | Built-in |
| List price (MSRP) | $14,065-$15,920 | $14,080 | $12,689 |
| Full warranty | 2-yr full | 2-yr full | 2-yr full |
| Made in | USA | - | - |
| Wi-Fi / app | Yes | Yes | No |
| Total capacity (cu ft) | 29.1 | 29.5 | 29.05 |
| Refrigerator (cu ft) | 18.7 | 17.18 | - |
| Freezer (cu ft) | 10.4 | 12.34 | - |
| ENERGY STAR | No | - | Yes |
| Performance rating | 5/5 | 4/5 | 4/5 |
| Design rating | 4/5 | 4/5 | 4/5 |
| Features rating | 4/5 | 4/5 | 3/5 |
| Value rating | 3/5 | 4/5 | 3/5 |
| Where to buy | Check price | Check price | Check price |
Prices are manufacturer or retailer list prices when we last checked; luxury brands set minimum advertised prices, so savings usually come from dealer packages and rebates. Ratings are editorial estimates: see how we rate.