It’s on knob and tube, there’s no working heat system, old single pane windows etc.

The majority of the time we are renovating buildings with landlord paid heat that have this and these ACs also, we are separating it to minisplits on the tenants electric which do heating and cooling.

The HVAC has been completely revamped to provide central AC and heat throughout the home.

They require regular maintenance and sealing plus they can be sensitive to moisture and heat.

There is a sunroom attached that isn’t connected to central heat and air, but has a window unit.

Real Estate is really fluid and you can go either way depending on what you want out of Real Estate. 

Second is to put an ad on Facebook for free heating oil , It will go quickly . 

Landlord pays heat and water. 

Tenants running the heat and air conditioning at the same time.

(Which does sound like an owner expense, especially if you advertised a heated pool.) get a couple more quotes> I’m guessing it depends on if it’s like a septic inspection during a sale in MN.