Also changed furnace filters, and new batteries in the thermostat every other year.

It's almost necessary to put your WiFi router and Wave Z HUB on a battery (UPS) to avoid this. 

They have the crime statistics (simple assaults, battery, menacing; aka. kids and bar fights) and home values that match the model of gentrification.  

This does not stop you from bringing an action later, but is the long route to settling issues.Does your lease require tenants to replace light bulbs, batteries, etc?

I have mine do the lawn/snow and pick up trash, then I have another tenant clean the halls and common areas, take out the laundry trash, pick up trash and replace hallway light bulbs and smoke detector batteries.

Boeing got the 787 battery problem fixed its an awesome aircraft and they built them there at the Charleston airport and Boeing bought about 1,000 acres surrounding the airport ... 2.

They are also stating that charging them for light bulbs ($15), smoke detector batteries($5), and painting ($145) is nickel and diming them, or falls under usual wear and tear.

I welded the middle 3 point hitch with 3 car batteries, some jumper cables, vice grip pliers and 1/8" 6014 welding rods.

@Jessie TetreaultInteresting thought about the key pads, but I thought all of them have a physical lock as well to be used as a backup in case the battery dies in the keypad? 

I used a commercial-style Diakin cassette system in a finished lower level renovation of a house on the Battery with good results, but it was a situation where a ducted system was simply not an option.