This is up to your profit goal, are you paying a salesmen commission, your overhead & how busy or slow you are. With a sales person commission and the costs and times list...
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We have been using it over 10 years. In fact I still have a copy of the original DOS based Intac (pre Wintac). We do not use all of what it can do and have had tweeks done for u...
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In a tank measure the temp of the tank and then the pressure in the tank and use a PT chart to get you close. In a condenser run just the fan for 15 or more min without the comp...
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