Best 42-Inch Side-by-Side Refrigerators

The best 42 inch side by side refrigerator for most built-in kitchens is the Sub-Zero BI-42SD, with the GE Monogram ZISS420DNSS as the best alternative if you want more usable freezer organization and lower entry cost for the 42-inch class, because both solve the core 42-inch fit problem: 42″ wide, 84″ tall, 24-25″ deep cabinet integration without needing custom panels in stainless.

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#1 Pick

Viking Professional 5 Series 42" Built-In Side By Side Refrigerator

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#2 Pick

Kenmore 29 cu. ft. 36" Wide Side-by-Side Refrigerator – FPR Stainless Steel

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#3 Pick

Electactic 18.1 Cu. Ft. Side by Side Refrigerator with Freezer, 2-Door Refrigerator with Built-in Ice Maker, Water Dispenser, Garage Ready Freezer with Digital Temperature Control, White

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#4 Pick

20.7 Cu.Ft. Side-by-side Refrigerators, 36" Full Size Refrigerator – Black

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Why 42-Inch Side-by-Side Is a Specific Fit, Not Just a Bigger Fridge

A 42-inch side-by-side is not a scaled-up 36-inch freestanding model. Almost every model sold in 2026 in this width is a built-in, 84-inch tall unit designed to sit flush with 24-inch deep cabinets and accept either stainless or custom panels. That changes everything about dimensions, clearance, and installation versus a standard 69-inch tall, 30-inch deep French door fridge.

If your opening is 42 inches wide, you cannot substitute a 48-inch model and you should not fill it with a 36-inch freestanding unit without trim kits that leave gaps and ventilation issues. The 42-inch class exists specifically for kitchens built between the late 1990s and now where architects specified a 42-inch refrigerator alcove.

Exact Exterior Dimensions and What Your Kitchen Must Have

Do not rely on the nominal 42-inch label. Built-in units have zero-clearance hinges but require precise surround tolerances for airflow and door swing.

Kitchen-fit requirements that actually cause failed installs:

• Height: You need a true 84-inch floor-to-soffit height. Standard 36-inch freestanding kitchens have 54-inch upper cabinets over the fridge, which will not work. The grille at the top needs 1/8-inch to 1/4-inch breathing room.
• Depth: These are 24-inch cabinet depth units. If your cabinets are 24 inches deep, the doors and handles will protrude 2 to 3 inches. If you have a 30-inch deep alcove, it will look sunken unless you pull it forward with a spacer.
• Water line: Requires a 1/4-inch OD copper or braided steel line with a shut-off within 36 inches of the rear, not directly behind the compressor.
• Electrical: 115V, 60Hz, 15A dedicated grounded outlet, typically located in the top recess or behind the grille, not behind the unit.
• Flooring: Unit weight is 500 to 580 lbs empty. You must have finished flooring run underneath. Do not install on subfloor expecting to slide it in later.

Door Clearance: The Number Spec Sheets Hide

Built-in side-by-sides use offset hinges that allow 90-degree opening within the 42-inch opening, but full access to drawers and ice bins requires 110 to 130 degrees. If you have an island or perpendicular wall within 48 inches, you will hit it.

Use this calculation before you buy. For a typical 21-inch wide door (42-inch unit divided in half):

Clearance needed for 90-degree swing = Door width = 21 inches from the hinge side. Clearance needed for 130-degree full extension = Door width x 0.77 + depth with handle. For these models that is roughly 21 x 0.77 + 27 = 43.2 inches from the front plane of the cabinets. If your island is 42 inches from the fridge doors, you can open to about 115 degrees, which is enough for most drawers but will make removing a crisper for cleaning tight.

Practical fixes if clearance is tight:

• Choose a unit with removable door bins that clear at 90 degrees, like the Monogram ZISS420 series, which lets you pull bins straight up rather than swinging out.
• Order a 90-degree door stop kit if the opposite wall is at risk. Sub-Zero offers this as a field-installed pin.
• Do not recess the unit deeper to gain clearance; you need 2 inches at the back for proper condenser airflow in grille-top models.

Usable Storage vs. Rated Capacity

Rated capacity for 42-inch side-by-sides is usually 24 to 25.5 cubic feet. Usable space is 15 to 20% less after ice makers, dispenser housings, and thick built-in insulation that keeps the wall thickness at 2.5 to 3 inches versus 1.5 inches on freestanding units.

What matters for daily use is width per compartment. Each side is only about 18 to 19 inches wide internally. A full pizza box will not fit flat on a shelf. A 12-inch wide serving platter will. If you routinely store wide trays, a French door or 48-inch side-by-side is a better choice than any 42-inch side-by-side. Where the 42-inch side-by-side wins is vertical organization: tall bottles, gallon-door storage without losing shelf width, and freezer items you can see at eye level rather than stacked in a bottom drawer.

Ice Maker Layouts and Which One to Pick

All three common layouts exist in the 42-inch class and they affect usable freezer space more than any other feature:

1. In-Freezer-Disable Automatic Maker (Sub-Zero BI-42S / BI-42SD style)

Traditional auger module mounted on the upper freezer wall with a removable bin. Produces usually 4 to 6 lbs per day. Pros: Maximum ice storage, simplest to service, no loss of refrigerator door space. Cons: Takes 3 to 4 inches off the top freezer shelf. If you need that shelf for frozen pizzas, you will lose it.

2. Door-Dispenser Through-the-Door (Monogram ZISS420DNSS style)

Ice maker in the freezer door with insulated dispenser housing and external pad. Pros: Crushed and cubed on demand, no opening the freezer. Cons: Dispenser housing robs 2.5 inches of door bin depth and adds a mechanical point of failure in the freezer door seal. Needs good water pressure (40-120 psi) or ice clumps.

3. Internal Filtered Maker with No Dispenser (JennAir / Thermador panel-ready)

Compact maker low in the freezer with internal water filter manifold. Pros: Clean exterior panel look, most reliable for low-use households. Cons: You scoop ice manually.

Decision rule: Choose in-freezer if you want reliability and maximum bin capacity. Choose through-the-door only if you use ice daily and have a water line with an inline filter you will actually replace every 6 months. For secondary beverage fridges in a gaming room, internal non-dispenser is quieter and wastes less energy.

Energy Use and Real Running Cost: A Worked Calculation

Built-in side-by-sides use more insulation but run dual compressors in premium models, so Energy Guide labels are around 650 to 740 kWh per year. That is higher than a 21 cu. ft. freestanding Energy Star model at 550 kWh, but lower than two separate columns.

Worked calculation for annual cost and heat load:

Take a typical 42-inch rating of 700 kWh per year. At a 2026 U.S. average of $0.155 per kWh, annual electricity cost = 700 x 0.155 = $108.50 per year, or about $9.04 per month. Daily consumption = 700 / 365 = 1.92 kWh per day. Average watt draw averaged over 24 hours = 1920 Wh / 24 h = 80 watts continuous. Peak draw when both compressors start is 400 to 600 watts for 2 to 3 seconds.

For power budget planning if this is on a backup circuit with a gaming PC setup: Do not put a built-in refrigerator on the same UPS as your PC. The compressor inrush will trip a 1000VA UPS. If you must use a generator, allow 1200 watts running and 1800 watts starting. The heat rejected into the kitchen is also 1.92 kWh per day, which equals 6,553 BTU per day, enough to raise a 300 sq. ft. kitchen by 2 to 3 degrees if ventilation is poor.

Settings that actually reduce use: Set refrigerator to 37 to 38F and freezer to 0F. Setting the freezer to -5F increases consumption by roughly 8 to 10% with no food safety benefit. Keep the condenser grille vacuumed every 6 months; a dusty grille on a 42-inch built-in adds 12 to 15% energy use because airflow is restricted at the top.

Decision Matrix: Which 42-Inch Side-by-Side Fits Your Situation

Installation Checklist Before You Order

Measure twice with the doors off your consideration list:

• Measure opening width at top, middle, and floor. Use the smallest number. If it is less than 41 7/8 inches, you need a cabinet shop, not a different fridge.
• Measure height from finished floor to soffit at the front and back. Built-ins cannot be tilted; you need 84 1/4 inches to lever it in.
• Confirm anti-tip bracket location. 42-inch units include a floor or wall anti-tip bracket that must be lagged to studs. Without it the unit can tip when doors are loaded.
• Check water pressure with a gauge on the line. Over 120 psi needs a regulator, under 40 psi will cause thin ice cubes and dispenser sputter.
• Plan delivery path: 42 1/2-inch doorways are required. Remove interior doors and handles before delivery day.

If you are replacing a 42-inch side-by-side from the early 2000s, verify the hinge side. Many older kitchens placed the refrigerator side on the right; newer Sub-Zero and Monogram units are available in left or right hinge but must be ordered correctly, as field reversal is not possible on built-ins.

Bottom Line for Buyers in 2026

Buy on fit first, ice layout second, and panel needs third. For most homeowners with a standard 42-inch by 84-inch opening, the best 42 inch side by side refrigerator is a stainless built-in with an internal ice maker if you value reliability, or a through-the-door dispenser model like the Monogram ZISS420DNSS if you will use external ice and water every day. Both will give you roughly 13 to 14 cubic feet of usable fresh food space and cost about $95 to $115 per year to run, while fitting flush with 24-inch cabinets where a freestanding 36-inch unit never will.