first have a look at the manufacturer label and record how many Btu per hour is your A/C capacity then devide this number by 12000 Btu per ton the result will give you the tonage per hour of your unit. if on the other hand label is not available or is missing, take the amps drawn by the compressor at full load and normal operating conditions devide by 6 and you will get the approximate tonage for your unit ( you should note that this way is only valid for a 220v ,50Hz single phase supply only)
A very good place to read about central air conditioning systems is consumer reports. They have a good guide on purchasing central air conditioning systems.
Centralized air conditioning
Some of the best air conditioning systems brands include GE and Amana. Both are very highly rated and popular.
Air conditioning reduces the temperature and humidity of air in buildings. Air conditioning systems are commonly used in large commercial or institutional buildings to maintain a constant environment.
When it comes to safe products especially for the environment HVAC air conditioning systems are a must. The benefit of having one is that they are safe.
Their air-conditioning systems.
Haier Air is one of the popular green air conditioning systems. They offer great heat and air that will save you up to 50 percent of heating and cooling costs.
One can purchase split air conditioning systems from Royal Fresh Air, eBay, Orion Air Sales. Ductless mini-split air conditioners are a good choice and is relatively easy to install.
On some systems (such as air conditioning).
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The cost of your ductless air conditioning system is going to depend on the size of the system. I found that single zone systems cost between $1100 and $1700 and the cost of multiple zone systems ranged from just over $2000 to close to $4000 (again depending on the number of zones).