lalvineet wrote:
Mr. Khan...sorry I found Craig's charges higher. I dont doubt his technical expertise though.
If you show Craig what you got from Frank, he will match it. Also make sure you are getting the latest model unit 4A7A. There are 3 different types of 3 ton units. There's a R-22 unit (2A7A) and 2 different R-410A units (4A7B and 4A7A). 4A7B is an old unit and 4A7A is a new one. Make sure you are comparing apples to apples and not just price.
2A7A- cheapest
4A7B is cheaper than 4A7A.
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Why 410A?
Refrigerant 410A was developed to replace refrigerant 22 because R-22 is being phased out due to its ozone depletion potential. R-410A has no ozone depletion potential but does have a higher global warming potential. However, according to experts, the overall global warming potential with R-410A should decrease because of its higher efficiency reducing power plant emissions.
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As of January 2010 the standard refrigerant used in most all residential HVAC systems, R-22 (freon), will no longer be allowed to be used when manufacturing new equipment. This government mandate came to be after recognizing how this refrigerant R-22 was harmful to our planet’s ozone layer due to its properties of chlorine. Another part of this EPA mandate will include the complete phase out of all manufacturing of the R-22 refrigerant with no production or importation beginning in 2020.
A new refrigerant which does not contain chlorine is currently being manufactured and installed in many new systems. This new refrigerant is called R-410a and also goes by other trade names such as Puron and Prozone.
The cost of the old R-22 is increasing as the new R-410a becomes more and more popular but should not be outrageous for a few years. This mean its time to replace your HVAC system that you should strongly consider going with R-410a as it will be available in years to come as R-22 phases out. What it really boils down to is that if you install a new R-22 air conditioning system in the year 2008 you will only be able to get the R-22 refrigerant for your system until the year 2020 and refrigerant repairs could become very costly as the demand for R-22 decreases and the cost increases.