Depreciation rate on Air conditioner F.Y 2019-20

If you installed a window air conditioner, for instance, you could deduct the cost under Rental Expenses. If you installed a central air conditioning system ,however, that is considered a Capital Improvement and would be depreciated for 27.5 years, the same as the rental property itself.

The rate of depreciation on air conditioner is 15% if used for production purposes and is classified under plant and machinery.

If the A.C. is used in office then it is classified as office equipments and thus depreciation rate is 10%. 

Hope this helps!