Water leaks through the granite fieldstone foundation, but drains well and dried quickly due to good air circulation.

There's a related petition circulating right now that I've signed that I think a lot of Chicago people on BP would support: https://www.change.org/p/chicago-city-council-re-legalize-coach-houses-and-similar-accessory-housing

50 degrees is a good temperature for a vacant unit if you have forced air heat circulating.

If this is a hot water circulating system and if the lines and boiler were drained, you might have a few breaks, but not a disaster--no flooding because all the utilities would have been turned off. 

In just 20-30 minutes per day, you can get moving, get those creative juices flowing, improve your circulation, and boost your energy.

The circulator pump wasnt working .

Did someone replace the circulator pump?

Tenants need to air out the home, use ventilation fans, and keep blinds and curtains open so air can circulate against the windows.

They should ensure ventilation in the bathrooms and kithens, keep blinds open so air can circulate against the window pains, and try to air out the home every few days, if even only for five minutes.CLICK HERE for an EPA mold guide and share it with your tenants.

If you own a rental property with the intention of collecting passive income indefinitely (of course who knows what the future holds) you should send your tenant:New air filter (if you have a HVAC) every X monthsGet the filter with the least amount resistance, meaning buy the “worst” quality one and send the replacement filters more oftenThe worse the filter the easier the fan has to work to circulate the airHigh priced filters trap more “stuff” but require more power and wear and tear on your HVAC unit.