Rental Depreciation

I purchased a garbage disposal, dishwasher and HVAC unit (A/C) for the rental.  Are these correct information to enter for each appliance for depreciation?
 
            Dishwasher
                    Asset Type:                            Tools and Machines
                    Depreciation Method:         Double Decline Balance   (use Section 179 if I want to deduct everything for the taxyear)
                    Life:                                            7
                    Depreciation Convention:     Bought July 12, 2020 (what do I use, 1QT?)
 
 
 
            HVAC
                    Asset Type:                                Tools and Machines
                    Depreciation Method:            MACRS Straightline
                    Life:                                             27.5
                    Depreciation Convention:      Bought 6/10   (not sure what to use here)
 
I also bought a garbage disposal for $122 for a rental.  Do I need to depreciate this item or could I just expense this under 'Supplies'?
 
Thanks for your forthcoming response.