Does the same apply to knob and tube wiring if it’s found in the house?  

@Adrian SmudeBest investment at this point is tube rentals down the Rifle River!

He bought it with the expectation that they will build #5, but that's up in the air and years down the road.

Hello.  Would hiring someone through up work be a good strategy to cold call on prospects for giving me an opportunity to CoHost their STR?

Still need to clean it with regular household cleaning supplies, keep the dehumidifier running, and try to increase some air flow if possible. 

@Chris Seveney Chris your you tube video are not available.

Hope to add air purification.  

You are just pulling statements out of the air to seemed enlightened.

@Rich Bultema - Just from my experience I have not had an appraiser impact the value for an older heater/air conditioner, however, a heater without A/C (as an example) has impacted an appraisal on a single family home.

Is that specifically a central air unit or did the furnace crap out?