Wrinkled fruit, wilted lettuce. You've seen your share of past due, even spoiled food in the refrigerator. Well, it doesn't have to be that way - the Sub-Zero 48" Built-in Side-by-Side Refrigerator with Internal Dispenser keeps your food fresher longer with the most advanced food preservation technology available - a technology developed through almost 70 years of research. That means crisper greens, juicier peppers, blueberries that burst with flavor - even weeks after you've brought them home from the market. You'll taste the difference.
With dual refrigeration, fresh foods thrive in a humid yet chilly climate, while frozen and convenience foods get the dry, frigid air they need. An air purification system inspired by NASA technology scrubs the air of ethylene gas, bacteria, mold and viruses. A magnetic door seal system locks in cold, while an advanced microprocessor provides pinpoint climate control. Discreet internal dispenser delivers filtered water and ice. Storage capacity for the BI-48SID is a generous 18.6 cu. ft. refrigerator, 9.6 cu. ft. freezer. Bottom line? More flavorful, delicious food for you, your family, your guests.

Ice and chilled water dispenser inside the refrigerator marries convenience and aesthetics

Keep chilled water and ice at your fingertips without having to sacrifice the clean appearance that has made Sub-Zero a leader in timeless built-in design.

Dual refrigeration keeps food fresher longer

This technology pioneered by Sub-Zero features separate compressors and cooling systems for the refrigerator and freezer. Fresh food stays fresher in cool, moist air on one side, while frigid, dry air prevents frost and freezer burn on the other - optimum preservation conditions for each type of food.

Air purification system fights spoilage, odors

Many fresh foods emit ethylene gas, a natural compound that hastens spoilage. Sub-Zero's built-in refrigerators come with an anti-microbial air purification system (based on technology developed by NASA) that scrubs the air of ethylene, as well as mold, viruses and bacteria, every 20 minutes.

Crispers and deli drawers in low-temp, high-humidity zones for optimum freshness

Crispers and deli drawers are strategically located near the evaporator to maintain temperatures a few degrees cooler than the rest of the unit. Drawers are sealed to lock in humidity and ensure freshness.

Microprocessor control assures peak performance

Our state-of-the-art microprocessor preserves your food by adjusting to your individual climate and schedule. It continuously monitors each section of your Sub-Zero for pinpoint climate control, so foods are kept at their ideal temperature, varying by only one degree of your set point. Also lets you finesse your lighting and cooling fan, tells you if your door is ajar, and defrosts when it's most convenient for you.

Water-filtration system reduces contaminants, chlorine taste and odor

Designed to reduce contaminants and chlorine taste and odors when purifying water or ice, this low-maintenance system uses a filter built to last 1 year or 750 gallons. Replacement is fast and easy.

Freshness cards for maximum food preservation

Different foods require different storage procedures. That's why, inside each refrigerator, we include "freshness cards" that provide easy-to-follow tips for ensuring maximum food preservation.

Rigorously tested in our U.S. manufacturing facilities to ensure at least 20 years of heavy use

Every component of every single Sub-Zero unit is tested in our U.S. manufacturing facilities before assembly, then every completed product is factory-tested for up to 24 hours before shipping. In our labs, components are subjected to electric jolts, violent vibrations and 350 temperature swings, and tested to stand up to at least 20 years of heavy use.

Exceptional 24/7 support from our Customer Care team based in Madison, Wisconsin and just footsteps from our factory

Whether you're shopping for appliances or have questions about those you already own, our Customer Care team has a reputation for service that's as exceptional as our products. They're based in Madison, Wisconsin, just footsteps from our factory, and are standing by to provide expert, friendly, problem-solving support.

Magnetic door seal system locks in cold air

One-piece construction, extra-heavy insulation and magnetic gaskets around every door lock in cold air. Our seals are so secure that even after power outages of multiple days, owners report no thawing of their frozen foods!

Automatic ice maker with "max ice" feature

High-efficiency unit provides crescent-shaped ice cubes and includes a "max ice" feature capable of increasing ice production by an average of 30 percent for a 24-hour period - just the boost you need for parties and holidays.

Adjustable shelves for maximum convenience

Food comes in all shapes and sizes, and the interior design of our refrigerators and freezers accommodates that diversity. Main shelves, door shelves, even dividers in drawers adjust to allow the most convenient configuration possible.