How important the A/C is will depend on where your rental property is located and how hot the temps get there and how many months the hot weather lasts.I would just include replacing the filters as a bonus to the tenant.Filters say they last 3 months but really it is not true.This is especially if you have a smoker or a tenant with pets.What happens is air filters should be replaced if the cheap ones about every month to 2 months max.Expensive ones you can go up to 2 months.If you wait 3 as more dirt is attached to the filter it restricts air flow and won't pull in as much dirt.When this happens less air will flow through the vents and the tenant will turn the unit down more and the resistance will make the motor work harder and wear out faster.I was having this happen in my house.A/C unit is 9 years old.When it gets in the high 90's here the A/C unit was getting in the 80's.Has an A/C guy come out.I had the old analog mercury switch A/C thermostat which is off by as much as 5 to 6 degrees sometimes the guy told me.I use the Filtrete Ultra Allergen because we have 5 cats and was replacing filter every 3 months (cost about 17 bucks a filter).The A/C guy explained about air flow and that I need to replace filter every month.The high end filter will catch more particles he said and when you keep them replaced they are fine every month.If you wait the 3 months it will reduce the air flow to much with the dirt it catches.So I replaced the filter and he also checked my free on level which was fine but my coils needed cleaning.He just basically took a hose and cleaned it out after turning power off and before the 100 dollar bill was not sticking to the coil halfway to the bottom.After cleaning the bill was sticking to the coil everywhere.He said it's important that when the heat comes out the coil can cool it properly before it goes back in the house.I bought the electronic thermostat myself for 25 bucks and took out the mercury one.Now with it being 95 outside it is holding at 73 degrees just fine.So I would replace filter every 2 months at the most to preserve the motor and help air flow.On some properties the builder installed too small of duct lines for the air flow and run to the vents anyways so any little air flow restriction will make the unit hard to keep cool in the hot weather.Probably too much info but thought I would share.Hope it helps.

I told the buyers to walk across the floor to the thermostat and switch it on.

Only cost me about $50 per baseboard, another $100 roll of pex, $200 for romex and breaker for box, and $25 thermostat.

HVAC guy just called me to let me know they had the intake vents covered with plastic and the thermostat set at 60 on the 1st floor.

(as opposed to installing inside the wall) Also, do you recommend remote thermostats to limit wiring?

Personally, I just carry all the finishing materials that I use over and over on every house:- Deadbolts, Door knobs- Light fixtures- Fans- Faucets- Mailboxes- Sinks- Switches, Receptacle- Switch Plates, Outlet Covers- Mini-Blinds- Thermostats- HVAC Registers, Returns- EtcThese things don't take up that much space.The one thing that I do keep in inventory (and buy in bulk) that does take up space is appliances.

So you might see some back-up heating system even with geothermal, if my hunch is on target.I vaguely recall something about thermostats being a bit different when they are operating with some of these alternative heat sources; you might check the model number of the thermostat and see what it leads to.Lastly, in my area the source of heat is part of the tax assessor records, so that you could look it up in the event of concerns about heating fuel source.

Did you hear Dave Lindahl's story about his tenants who'd put ice buckets on thermostat so that it would keep working 24/7.

Takes some playing with the hot water heater to get this into that range; I always try to take the reading just after the hot water heater has turned off from a heating cycle, since that is when the water has been heated to the thermostat setting.Sorry that I don't have much else to suggest on this; I suspect at some point you will end up evicting this tenant.

If we can find one with a thermostat.