مناسب ترین کولر گازی برای شمال ایران | دماتجهیـز

In Pakistan, T1,T2,T3, concept is not very much clear because different companies express different meaning as for as the advertising is concern.
Although, I know, it is a Climate class rating of different Air Conditioners being used in different regions, like winter, summer, moderate or tropical seasons. I need detailed information with respect to set standards by ASHRAE or any other world famous organization who regulates and designs T, T1,T2,T3, etc.
I shall be greatful for your kindness.
Best Regards!
Muhammad Yousaf Mirza
Karachi Pakistan
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