You can find commercial refrigerators at Sears and the Home Depot. These places offer a nice selection, great prices and often warranties for your appliances.
Commercial refrigerators come in all shapes and sizes, from undercounter models that are smaller than household fridges to walk-in refrigerators that are actual rooms. However, "standard" commercial refrigerators are often about the size of residential refrigerators - they just don't have the freezer compartment.
Commercial-size refrigerators are generally much larger than home refrigerators. Thus, commercial-size refrigerators consume more electricity and use more power.
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Commercial refrigerators are very large sized or walk in types refrigerators. Most often these are found in restaurants or any location that has high volume food processing. Non-commerical refrigerators are you normal in home types.
There are many brands which sell commercial refrigerators but two of the best are " True" and "Turbo Air". Some lesser known are Traulsen, and Beverage Air.
Brands that manufacture under the counter refrigerators include kenmore, maytag, lg, samsung and many more. Most of them are usable for commercial spaces.
The commercial is for the Samsung refrigerators.
There are many makes and models for commercial refrigerators. Most of them last between 7 and 10 years. I always recommend shopping around for a good brand before purchasing an appliance.
Some companies that manufacture commercial reach-in refrigerators are Kelvinator, Arctic Air, True Refrigeration, TSR, Turbo Air, Traulsen, and Summit Appliance. These come in one door, two door and more.
Helium is not typically used in refrigerators for cooling purposes. Refrigerators commonly use refrigerants like fluorocarbons, hydrocarbons, or ammonia to facilitate the cooling process. Helium is often used in cryogenic applications or for leak detection.
The majority of refrigerators, yes. These refrigerators only need electricity to run, not water. However some modern refrigerators do have a water line connected to them and constantly cycle fresh water, the water is near-frozen then fed into the refrigerator via vents as condensation. These refrigerators are usually huge, however, and are mostly used for commercial purposes, though some can be purchased for the home. You are fine as long as you don't have one of these huge commercial refrigerators.
Walk-in refrigerators or coolers are definitely for commercial use. Kolpak is one company that manufactures such equipment. For walk-in refrigerators in the $4,000 range you can look on the following website: http://www.ckitchen.com/commercial/walk-in-units.html?gclid=CO6bn6S4kaoCFcWA5QodRXJ8xA