Frequently asked questions

Sub-Zero is the only home refrigeration system with dual refrigeration, which simply means that the refrigerator and freezer have separate compressors. This has several advantages. Frozen foods need very cold, dry air. Refrigerated foods need somewhat warmer and much moister air. Each compressor maintains precisely the conditions needed on its side of the unit with the compressor running only when needed. In other refrigeration systems the single compressor has to pull double duty, with wear and tear you avoid with Sub-Zero.

In a Sub-Zero unit, thanks to dual refrigeration, air never passes back and forth between refrigerator and freezer. Which means you'll never again have frozen foods picking up unwanted flavors from the fridge. No more onion-scented ice cubes. Yes, all combination refrigerator/freezer models have dual compressors.

Ethylene is a natural gas emitted by ripening fruits and vegetables that accelerates spoilage in nearby produce. Sub-Zero refrigerators actively purify the internal air every 20 minutes, neutralising ethylene gas along with bacteria, mould spores, and odours. Read our full guide to ethylene gas and food spoilage.

Sub-Zero uses dual refrigeration, active air purification with ultraviolet and titanium dioxide technology, and microprocessor-controlled temperature management. Products are designed and tested for a 20-year lifespan and manufactured in Madison, Wisconsin.

No. It may appear so, but because there are two independent systems and compressors in our Sub-Zero products, the freezer compressor could run, followed immediately by the refrigerator compressor. This may give the illusion that one or the other is running continuously. Each compressor only runs when its own compartment requires cooling, which is normal dual refrigeration operation.

Yes. Refer to the Installation Guide for your product, as it is very important that this device be installed. You can download the Installation Guide for your product by clicking here and selecting your product.

Sub-Zero products are designed and tested for 20 years of use. By comparison, the typical lifespan of a standard domestic refrigerator is around 10 to 13 years.

Sub-Zero appliances purchased through authorised UK dealers are covered by a 5-year warranty. Full terms are available on our warranty page.

Pricing is available through our authorised dealer network. Use our dealer locator to find your nearest stockist.

Yes. The Designer and Integrated ranges are built to accept custom overlay panels, allowing the appliance to be finished in the same material as surrounding cabinetry. Classic models are available in stainless steel as standard.

Flush inset means the appliance is recessed so its door face sits level with surrounding cabinet fronts, creating a flat, uninterrupted kitchen facade. It requires precise cabinetry depth planning and is best specified from the outset of a kitchen project. Your dealer can advise on exact requirements for your chosen model.

Yes. Sub-Zero column units allow the refrigerator and freezer to be specified and positioned independently. Columns are available in a range of widths and can be integrated behind custom panels.

Classic models feature Sub-Zero's signature stainless steel exterior. Designer models are built for full panel integration with bespoke cabinetry. Professional models combine stainless steel with a bold pro-style handle design. All three ranges share the same core technology, including dual refrigeration and active air purification.

Yes, though Sub-Zero units are engineered primarily for built-in installation. Freestanding use still requires the clearances specified in the installation manual, and side panels are needed as the cabinet sides are unfinished.

Yes. Sub-Zero appliances must be installed by experienced fitters familiar with the manufacturer's specifications. Correct installation is required for the unit to perform as intended and for the warranty to remain valid.

Sub-Zero refrigerators require a 230V, 50Hz, 13-amp dedicated socket. Full electrical requirements for each model are in the product installation guide, available from our support page.

No. Sub-Zero uses 304-grade stainless steel, which is non-magnetic and chosen for its durability and consistent finish.

Sub-Zero icemakers produce approximately 8 cubes every two hours under normal operating conditions.

All Sub-Zero 400 series wine storage models feature two independent temperature zones, allowing red and white wines to be stored at their respective optimal temperatures within a single unit.

Each zone can be set independently to suit red or white wine storage. For precise temperature ranges by model, refer to the specification sheet available from your dealer or our support page.

Capacity varies across the range, from undercounter models to full-height wine columns. Visit our wine storage range or speak to your dealer for capacity by model.

Our delivery team is experienced with complex access situations including city properties and new developments.

Yes. We can arrange a pre-delivery site survey to assess access, logistics, and installation readiness.

As a general rule, our team will unbox the appliance and position it in the designated area. Where other trades are on site, the appliance may remain packaged for protection until it can be safely moved into its final position.

No. Sub-Zero is a residential built-in refrigeration brand and does not produce commercial units.