Where do I put in cost of new air conditioner on my rental home? in maintenance or depreciation? Thanks

[Opus 17]

Window unit?  Central air conditioning installed?

[Coleen3]

This is an asset that has to be depreciated. If it is a wall unit than can be removed, you will depreciate it over 5 years. If it is a central unit, depreciate it over 27.5 years, just like the building itself.

https://www.irs.gov/pub/irs-pdf/p946.pdf