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Commercial Walk In Coolers Engineered Specifically for Outdoor Use

The operating temperatures of Polar King walk in coolers range from 35°F (0°C) to 55°F (13°C).

Polar King commercial walk in coolers are designed specifically for outdoor applications requiring refrigerated storage. Each cooler unit is custom-built with our patented seamless fiberglass construction and available in both through-wall or freestanding applications.

All Polar King outdoor walk in coolers are delivered fully assembled and are ready to operate on delivery with a simple electrical connection. No on-site assembly or refrigeration work is required because our refrigeration experts have done all the work in advance, within Polar King’s quality-controlled facility. With a 100% seamless fiberglass design, Polar King offers the industry’s only one-piece, outdoor unit. If you’re looking for a walk in refrigerator rental, check out Polar Leasing.

The Polar King Warranty

  • 25-Year Coverage Internal Foam Structure
  • 12-Year Coverage Walk In Structure
  • 5-Year Extended Compressor Coverage
  • 1-Year Miscellaneous Parts and Accessories
  • 1-Year Refrigeration System & Components

Energy efficient and durable

White Polar King combo box
  • 12 Year Complete Structural Warranty
  • Cuts Operating Costs
  • Lowers Power Bills
  • Reduces Maintenance/Repair Costs
  • Eliminates Construction and Replacement Costs

The patented process for constructing our energy efficient walk in cooler incorporates urethane insulation completely encased in fiberglass, both inside and out. This method provides superior structural strength since it forms a one-piece structure. There are no seams on a Polar King walk-in unit; therefore the structure remains completely intact so air and moisture cannot deteriorate the insulation.

One-piece seamless construction allows the unit to be set outside without the use of a roof cap or any other type of expensive protection. The walk in is completely weatherproof and requires no assembly. Every Polar King comes with a 12-year complete structural warranty ensuring you superior durability even in the worst of weather conditions.

The Polar King walk in is designed to save you money by being as energy efficient as possible, cutting operating costs, lowering power bills, reducing maintenance/repair costs and eliminating construction and replacement costs. Polar King uses fiberglass, so you never have to worry about rusting, denting or corroding, and you can be certain that your unit will always look factory new with regular care and cleaning. If you’re looking for a freezer rental or a walk-in cooler rental check out

Common walk in cooler sizes & layouts

Inside of a Polar King industrial freezer
Blue and grey layout of refrigeration units

When choosing a Polar King outdoor walk-in, you have the flexibility to choose a thru-wall or freestanding unit. Thru-wall installations allow the operator to place the unit outdoors while providing the convenience of accessing the unit from indoors. Freestanding units on the other hand, are stand alone units that are not attached to the building and are accessed from outside.

The type of unit that is right for you will depend on how you intend to use the walk-in or what type of an operation you have. In many cases, a freestanding unit can later be used for a thru-wall application and vice-versa.

Whether you need a cooler, freezer or combination of both, a Polar King walk-in will save inside space and increase your buying power. Every Polar King unit allows you to design your own floor plan and enables you to locate doors and walls virtually anywhere. This flexibility provides foodservice operators unlimited storage opportunities ideally suited for their application, with additional configuration capabilities allowing you to organize your walk-in cooler in the most efficient way possible.

Freestanding and thru-wall units come in a wide range of sizes and variations. You can get your Polar King in widths from 6′ to 16′ and in lengths up to 60′. Before you plan to expand, consider the savings a Polar King will provide.

Configure Yours

Equipment for any cooler application

Metal shelving on the inside of a Polar King commercial freezer

Every Polar King unit includes top quality, dependable refrigeration equipment built for years of worry-free operation. All systems are installed and tested by our expert technicians prior to delivery.* There is no need for a refrigeration contractor on-site when the walk-in arrives to your location. In fact, a simple electrical connection is the only thing required to put most units into operation.**

Standard equipment for Polar King walk-in coolers and walk-in freezers includes:

  • Seamless Fiberglass Interior/Exterior
  • Hasp Lock (Ext. Door)
  • Safety Release Handle
  • Lockable Door Latch
  • Close Assist Hinges
  • Heated Door Jamb
  • Magnetic Gasket
  • Door Closer
  • Sweep Seal
  • 208-230/1/60 Refrigeration System
  • Low Ambient Controls
  • Defrost Timer
  • Light Switch/Pilot Light
  • Exterior Color Choice
  • Rain Cap Exterior Doors
  • Remote Thermometer
  • Interior Lighting
  • Crowned Roof
  • Heavy Duty Non-Skid Floor
  • Heated Freezer Door

* – Units specified with remote refrigeration are shipped detached from the walk-in and do not include installation and testing of the refrigeration system.  Unless otherwise specified, remote systems do not include refrigerant.

** – Electrical connections and on-site wiring must be completed by a licensed electrician and are the sole responsibility of the customer.  Polar King delivery drivers do not perform any electrical work on-site.

Available colors

Paint swatches

Standard Colors

Every Polar King walk in comes standard with any one color finish of your choosing. Our manufacturing process allows us to custom match an exterior building color, so you can choose from thousands of exterior colors to match your décor.

When choosing your exterior color you can choose from any one of our standard colors, or simply provide us with a paint code for the color of your choice. If you are unable to determine which color is most suitable for your application, we can make a near perfect match by using a sample from your current building color.

Polar King can even provide alternative exterior finishes including brick, granite, or even an exact match to the pattern of your building. For examples of previous work and more information, go to our Custom Exteriors & Paint page.

Accessories for any need

Food shelving and different parts of Polar King freezer unit

The specific needs of each application can vary. That’s why Polar King offers a wide spectrum of optional accessories to make your walk in even more suitable to your facility.

Polar King also offers graphic design services and customized finish work for walk in cooler applications requiring logos, advertisements, or intricate color schemes.  Ask you sales representative which options are right for you.

  • Shelving
  • Ramps
  • Door View Windows
  • Security Hasp Locks
  • Stainless Steel Kick Plates
  • Digital Thermometers
  • Temperature Data Recorders
  • Exterior Lighting
  • Much More!

Humidity Control Systems

At Polar King, we recognize that the perfect combination of humidity and temperature control is critical in a number of industries. Incorrect humidity levels and fluctuating temperatures can cause spoilage, damage products, and significantly decrease shelf life. We can design a system that provides a variety of different humidity levels and have multiple systems to add and remove moisture.

Delivered pre-wired, pre-assembled, tested and approved. Ready to operate.

Crane lifting a tan colored walk in freezer for delivery

Polar King uses our own experienced drivers and our own trucks to deliver every unit. You can be certain your new outdoor walk in cooler will arrive in the same condition it left the factory and will never be out of the hands of company personnel.

When we arrive on-site for delivery we will unload the unit and set it in place using our truck-mounted crane, forklift or whatever is required for a smooth delivery.

There is no need for a refrigeration contractor on site because the refrigeration has been installed and tested at the factory. A simple electrical connection to the building is the only requirement to put the unit into operation.

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Featured applications


Walk in coolers provide outside solutions to inside storage problems, in both stand-alone and through-wall applications.

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Beer/Keg Coolers

Polar King’s walk in keg and beer coolers can be customized to accommodate any taproom, brewery or beer cave need.

See beer coolers

Medical/Pharmaceutical Cold Rooms

Temperature-controlled environmental rooms and walk in cold rooms specifically designed for the storage of pharmaceutical products, samples and specimens.

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Custom Exteriors

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Custom Paint

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Ready to get started?

Simply fill out the contact form below and one of our specialists will be in touch soon to discuss how a Polar King walk-in can help your operation.

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Frequently Asked Questions about walk in coolers

Want to know more about Polar King walk in coolers? If you don’t see what you’re looking for below, check out complete answers to our 14 most frequently asked questions here.

How does a walk in cooler work?

Heat energy always moves from areas of higher temperature to areas of lower temperature.  Refrigerant inside of a walk in cooler absorbs heat inside, then passes through a compressor as it travels outside. The higher pressure increases the temperature of the refrigerant until it transfers heat to the outside air. When the refrigerant passes back inside, it is expanded again, cooling the refrigerant and beginning the process again.

What temperature does a walk in cooler operate at?

Walk in coolers are usually set at 35°, but specific applications may require higher or lower temperatures.

Can a walk in cooler be used as a freezer?

Standard walk ins may be able to be converted into freezers if their insulation is thick enough, but they would require major system changes. If you need a unit that can work as a walk in cooler or freezer, Polar King offers dual-temperature units that can be set for cooling or freezing temperatures with the turn of a dial.

What are common walk in cooler sizes?

Most manufacturers offer panel boxes that are assembled on site with 8’x10’ or 8’x20’ dimensions. Because Polar King’s outdoor walk ins are custom built and aren’t constrained by the size of your existing structure, we can build your walk in to whatever size fits your needs — up to 16’ x 65’.

How much electricity does a walk in cooler use?

There are many factors that affect how much electricity your walk in cooler uses, including the size of the unit, its location, and what it’s used for. Many walk-in coolers are 1½-3 horsepower systems needing 15-30 amps and 208-230 volts, 3-phase, but this may vary, depending on your application.

What type of insulation is used in walk in coolers?

Panel Boxes use foamed-in-place polyurethane components that can leave voids that allow heat to flow into the unit. Polar King walk in coolers use Polyisocyanurate rigid board insulation, which provides high compressive strength, excellent adhesion to facers, low water absorption, and low vapor transmission, and superior energy efficiency.