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YORK CORPORATION ldt» R. R. Thom, Manager -2- September 1.9, 1952 Sears Roebuck & Company Las Vegas, Nevada You will note that we have added 100$f for water loss on overflow to drains and wind drift. This overflow is necessary on evaporative con­densers because the constant evaporation of the water causes the solids to remain in the pan and the constant evaporation increases the con­centration. When we bleed off a little water constantly it retards the concentration and thus curtails the amount of magnesium and calcium salts in the water. The manner of arriving at these figures is our standard method of calculating operations for power consumption and have proved to be fairly accurate for your type of store. To answer your question regarding the capacity of your air conditioning system, I might say that the 1 2 5 tons capacity represents 125 tons of Ice melting capacity, This ice melting capacity is based upon a 2^- hour operation. In other words to produce 125 tons of refrigeration for 12 hours we could melt 6 2 -1 / 2 tons of ice for 12 hours and produce the 125 tons. The word “ton’' is defined as the rate of cooling result­ing from one ton of ice melted in Z h hours or the equivalent to 288.000 btu's. This can be expressed as 288,000 btu's per day. 12.000 btu’s per hour, or 200 btu’s per minute, flow ever, to actually make a ton of'ice with refrigerating equipment it requires about 1.8 tons of refrigeration to make one ton of ice because the water has to be cooled down from 70 or 80 degrees to 3 2 degrees before the freezing takes place, and then after the freezing, the ice has to be cooled from 3 2 down to 20 degrees or 15 degrees depending on the storage room temperature. The actual horsepower required in an ice plant to pro­duce a ton of Ice figures about 2 hp to 2-1/^ bp depending upon the water conditions. I bring these figures out to show that an ice plant making Ice is not comparable to your operation where a horsepower approximately equals oHe ton of refrigeration. from your letter it would seem to rae that a small group is benefiting from, this new law, and of course is not the democratic way. As far as the tax-payers are concerned' it is not e q u i t a b l e from their point of view as some users of air conditioning equipment run their machines considerably less than others. For example, in your case you operate about 10 hours per day willle a hotel or gambling casino would operate close to 20 hours per day and sometimes Z k hours per day. On that kind of a basis they should pay at least twice as much as you should. Of c o u r s e the correct method of charging for water consumption is with the water meter and the people who use more water should be charged more based upon 'the quantity. I see no logical reasoning behind this new tax both from the governmental standpoint and the consumer stand­point. You are approaching the problem in a logical manner by bringing group pressure to bear before the Public Service Commission. There was a case comparable to this not so many years ago in'Arizona. Tnere they were trying to pass a law compelling all users of refrigeration equipment over 2 5 hp to have operating engineers regardless of whether the equipment was automatic or not. Through our help and cooperation we were able to stifle this bill before it went through the legislature.