Polar King's lower energy consumption, means lower costs! See the comparative test results and how much you can save with a Polar King walk-in cooler or freezer.

1. Customers are saving thousands of dollars with Polar King
 What’s Important?
When buying a walk-in cooler or freezer, the initial cost of the walk-in is almost always the deciding factor. The cost to
operate the walk-in is rarely considered. You may think all walk-ins perform about the same. This mistake can cost you
dearly.
You pay for the walk-in once, but if the insulation is inefficient, you will pay for that every month for the life of the
walk-in. In the following you will find an evaluation of two different types of construction that are being used in
walk-in coolers and freezers.
 Types of Construction
Walk-in coolers have generally been constructed of modular panels made of insulating material and protective skins.
The protective skins have generally been constructed of metal. The purpose of the skin is to protect the insulation,
which is fragile and cannot be used independently.
The insulation is usually plastic foam material that is injected between the metal skins. The insulation material
provides the walk-in with resistance to heat flow, which allows the walk-in to be refrigerated in hot and cold
temperatures.
These individual insulated metal panels are then attached together forming the structure of the walk-in. This leaves
seams or gaps throughout the entire walk-in.
The newest construction method being used is to cut a block of foam insulation to panel thickness and is then formed to
create a walk in unit of the exact overall size required. Then the entire structure is permanently laminated on all sides
with a fiberglass skin. The fiberglass immediately forms a chemical bond to the insulation creating a 100% seamless
walk-in.
 What difference does it make?
A study performed by US Cooler Company in cooperation with Owens Corning and the US Corps of Engineers
indicated that the largest factor that affects the performance of walk-in insulation is moisture. Usually insulation is
expected to keep something warmer or colder that the other side of the insulation. This temperature differential causes a
dew point to form inside voids in the insulation. Once the dew point is reached, moisture is trapped. Another method of
moisture penetration is through the seams or gaps in a walk-in assembled with multiple interlocking panels. Since water
has a much lower R-value than the insulation, the water reduces the R-value of the insulation. The more water-resistant
the walk-in is, the better the insulation performs in high TD situations.
Since walk-in coolers and freezers are high TD applications, sometimes 100 degrees on the outside and –20 degrees on
the inside, the higher the moisture resistance of the insulation the better. When looking at the water vapor permanence

2. of the different construction methods, it is found that the pre-formed insulation panels with no voids or seams allows
the least amount of vapor permanence and the metal skinned, panels with seams the most. The seamless walk-in will
retain its R-value better than the walk-in constructed with individual panels.
 What does all of this mean to you?
A seamless walk-in can provide thousands of dollars in energy savings during the life of the walk-in. The previously
mentioned study indicated that the best performing metal/panel constructed walk-in lost 25% of its R-value over the
course of 5 years due to moisture. The average R-value lost over the course of 5 years was 75%. A seamless fiberglass
constructed walk-in will lose 0% of its R-value over the course of 5 years due to moisture penetration.
Based on the indication of the data, a seamless walk-in will provide 25% - 75% in energy savings over a metal panel
walk-in during the first 5 years. As an example, a 10’x12’x7’6” freezer operating at 32.5 degrees mean temperature with
a refrigeration system with 90% efficiency and an electric cost of $.09/kWh would provide a savings of $2560 - $7709
during the first 5 years.
 Conclusion
When considering the actual performance of walk-in coolers and freezers, it can be seen that being an informed buyer
pays substantial long-term benefits. Price should not be the only consideration when purchasing your walk-in. Initial
purchase savings could be eliminated by excessive operation costs over the lifetime of the walk-in. Thorough analysis of
initial cost plus operating cost will lead you to the best decision for your business.
*Estimated savings are based on specific conditions. Your actual savings may vary due to a different operating environment.
References US Cooler Company Owens Corning Internal Study US Corps of Engineers

3. Location
KW Usage During Test
Annualized KW Usage
Annualized Energy Cost
Polar King Competitor
Wendy's - Auburn, IN
349
6,049
$629
Wendy's - New Haven, IN
928
16,085
$1,673
Polar King & Competitor
Unit Size.....8 x 14
Age of Unit.....10+ Years
Average Outdoor Temperature.....51.8 F
Daily Door Openings.....4-7
Operating Temperature.....-10 F
POLAR KING'S LOWER ENERGY CONSUMPTION,
MEANS LOWER COSTS!
$650
$600
$750
$700
$500
$400
$450
$550
$900
$1000
$1050
$1100
$950
$800
$850
$1200
$1300
$1350
$1400
$1450
$1500
$1550
$1600
$1650
$1700
$1250
$1150
$50
$150
$100
$250
$200
$300
$350
Annual Energy Cost
Competitive Walk-In
$629
$1,673
Annual Energy Consumption
13000 kw
12000 kw
15000 kw
14000 kw
10000 kw
8000 kw
9000 kw
11000 kw
18000 kw
16000 kw
17000 kw
1000 kw
3000 kw
2000 kw
5000 kw
4000 kw
6000 kw
7000 kw
Competitive Walk-In
6,049 kw
16,085 kw
Annual Savings
With A Polar King Walk-In
$1,044
sAnnual SavingsAnnual Savings
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nWith A Polar King Walk-InWith A Polar King Walk-InWith A Polar King Walk-InWith A Polar King Walk-InWith A Polar King Walk-In
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$1,044$1,044$1,044$1$
(800) 752-7178
www.polarking.com
OUTDOOR FIBERGLASS WALK-IN COOLERS AND FREEZERS
When purchasing a walk-in cooler or freezer, the annual operating
costs are frequently overlooked as part of the decision making
process. However, the fact is that an oversight on energy
consumption will cost you dearly in the future.
The largest factor that can affect the insulations performance is
moisture. The more water resistance the insulation has, the better the
insulation will perform. Since moisture retention lowers the R-value
of insulation, it becomes very obvious why a seamless fiberglass
construction outperforms metal panel construction.
To further quantify this notion, a comparative test was performed to
measure energy consumption. In this test, with the cooperation of a
national fast food chain, watt-hour meters were installed in
Northeast Indiana on an outdoor Polar King freezer and a
competitive outdoor walk-in freezer. Both walk-ins were 10+ years
old and measured 8'x14' in exterior dimension.
The competitive unit used 928kw during the three week test period,
while the Polar King used only 349kw, which equates to a 62%
reduction in electrical consumption! The 2009 average national cost
was $0.104 / kWh, so the annual cost of operating the competitive
unit would be $1,673 annually. Compare that to the Polar King
annual cost of $629 and your decision becomes very simple.

4. 20-YEAR PROJECTION OF ENERGY COSTS
Polar King Walk‐In Freezer Metal Panel Walk‐In Freezer Polar King
Estimated
Annual Savings
Estimated
Cost/Kwh
Polar King
Annual kw
Estimated
Annual Cost
Estimated
Cost/Kwh
Metal Box
Annual kw
Estimated
Annual cost
$0.0900 6,049 $544 $0.0900 16,085 1448.00 $903
$0.0918 6,049 $555 $0.0918 16,085 $1,477 $921
$0.0936 6,049 $566 $0.0936 16,085 $1,506 $940
$0.0955 6,049 $578 $0.0955 16,085 $1,536 $959
$0.0974 6,049 $589 $0.0974 16,085 $1,567 $978
$0.0994 6,049 $601 $0.0994 16,085 $1,598 $997
$0.1014 6,049 $613 $0.1014 16,085 $1,630 $1,017
$0.1034 6,049 $625 $0.1034 16,085 $1,663 $1,038
$0.1054 6,049 $638 $0.1054 16,085 $1,696 $1,058
$0.1076 6,049 $651 $0.1076 16,085 $1,730 $1,079
$0.1097 6,049 $664 $0.1097 16,085 $1,765 $1,101
$0.1119 6,049 $677 $0.1119 16,085 $1,800 $1,123
$0.1141 6,049 $690 $0.1141 16,085 $1,836 $1,146
$0.1164 6,049 $704 $0.1164 16,085 $1,873 $1,168
$0.1188 6,049 $718 $0.1188 16,085 $1,910 $1,192
$0.1211 6,049 $733 $0.1211 16,085 $1,948 $1,216
$0.1236 6,049 $747 $0.1236 16,085 $1,987 $1,240
$0.1260 6,049 $762 $0.1260 16,085 $2,027 $1,265
$0.1285 6,049 $778 $0.1285 16,085 $2,068 $1,290
$0.1311 6,049 $793 $0.1311 16,085 $2,109 $1,316
20‐YR TOTALS
$13,226 $35,174 $21,947
Summary
With rising energy costs, having an energy efficient walk-in is more critical than ever. From the energy study findings, if you
had 10 stores and each saved $783 /year with their Polar King over a 20-year operational life, the calculated energy savings
are $156,600. If you factor in a typical 2% increase in electricity costs, per year, and the energy usage stays constant, the 20-
year savings are closer to $220,000 for the 10 stores.
Note: This 20-yr energy cost comparison is based on Polar King's energy study and these assumptions: electric costs increase by 2% per year, energy use
is constant, and a 20-year life expectancy for each walk-in freezer. This is an "example only" and the actual operating costs will be a result of site specific
conditions.

5. The Difference Between Polar King Walk-ins & Panel Boxes
 Polar King walk-in’s are made from a seamless, one-piece fiberglass construction that is
completely weather resistant. Polar King walk-in’s will NEVER leak, rust, dent or corrode.
Panel boxes have numerous seams where the panels connect. These seams will contract/expand with the changing
temperature, allowing air to leak out and moisture to get into the insulation. The panels will rust, dent and corrode.
 Polar King walk-in’s are made using a rigid 4” thick urethane foam board insulation for
coolers and 5” for freezers.
Panel Boxes use foamed-in-place insulation that can cause voids within the panels where the insulation does not spread
evenly. This leads to an inconsistent R-value and poor energy efficiency.
 Polar King walk-in’s are not affected by the outside temperature because fiberglass does not
conduct heat.
The metal skin of a Panel box will conduct heat. This means the hotter it is outside the more their compressor will run to
keep the inside temperature of their walk-in constant. (This will cost you more in operating expenses and shorten the
lifespan of their refrigeration system.)
 The structure of a Polar King walk-in requires no maintenance.
Panel boxes will need to have their seams caulked routinely to keep moisture out and the cold air in.
The roof on a Polar King walk-in will support up to 100 pounds per square foot.
Panel boxes will require a roof cap or additional roof structure because their roofs are not designed to support any
weight.
 Polar King walk-ins arrive fully assembled and ready to operate.
Panel boxes require on-site construction of the box, installation of the refrigeration and electrical system.
 Polar King walk-in’s come with a standard 5-year warranty on the compressor and 10-year
warranty on the entire structure (including doors, hardware, floor and roof).
Most Panel box manufacturers offer a 1-year warranty on the compressor, you have to purchase the additional 4-year
coverage and their roof panels are only warranted for a total of 5-years from date of installation.