I deal with foreclosed properties in the normal course of my daily work.
Most of the time, the foreclosed properties are occupied by either the owner....or more likely a friend or relative. Or, in RARE cases a "tenant", who was supposedly paying the owner rent each month, while the owner never made monthly payments.
In Maryland, we're required to place notices on the front door providing a specified time for the last occupant to contact us to retrieve their personal property.
In most cases, the property that is left behind in a vacant...foreclosed home, is "trash" and treated as such. Usable items like kitchen utensils, lawnmowers, appliances, furniture....is junk. And discarded by a hired vendor of the bank.
We run into vacant homes where nobody has lived in the place for over two years....as evidenced by the daily newspapers or calendars inside.
I can see where the pool heater is an issue, because that's considered "real property" as opposed to personal property. The new owner will have to buy a heater or the bank will replace it in order to sell the home. But the other items are penny ante.