Home refrigerators with freezer compartments became common in the 1940s and 1950s. Prior to this, many refrigerators had separate iceboxes or standalone freezers. The integration of freezer compartments into refrigerators was driven by advances in refrigeration technology and consumer demand for more convenient food storage solutions. By the late 1960s, most new refrigerator models included built-in freezers.
A refrigerator (well, technically, a freezer, but most refrigerators have freezer compartments). DRY ICE
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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.
Many home improvement stores have refrigerators. Most are peer reviewed. So try Home Depot or Lowes for starters, if you dont like what you find try other stores like Sears.
Kenmore and GE get the best rartings.
A great place online to read reviews on GE refrigerators is on Yahoo. Here is the link that will take you right over to where you want to go http://shopping.yahoo.com/refrigerators/ge--brand/.
The most common refrigerant used in household refrigerators is R-134a.
There are a few best rated refrigerators. To name a few there are: LG LFC25700, which is a bottom-freezer with excellent temperature control, and high efficiency. Another great brand is the GE GSH22JFX, a side-by-side with through-the-door ice and water and other features. Lastly, the Maytag M1TXEMMW, which has excellent cooling and energy efficiency.
The most energy efficient commerical refrigeratiors would be anything within the JE brand , they make everything energy efficent these days and more enviromentaly friendly .
I don't think that Excel Kitchen sells used appliances and refrigerators, they do however have discounts on brand new appliances only.
Toshiba Definitely