Of course it was a foreclosed property but was vacant for more than four years i.e. gas line was disconnected from outside, plumbing issues, water damage and so on (many surprises).

I had a name and a number, but when I called it, the number was disconnected. 

If you know someone, you could get a new 2.5 ton unit, line set, a-coil, new disconnect box (if needed) installed for around $2000-$2500.

Or other similar bristle brushes would work.I would caution that if it's hard duct pipe may be screws to hold the sections together that might get hung up if you tried to run a towel through, but I have done that with success - gently pulling of course.If it's flexible duct pipe, well, they do come disconnected quite easily.Then there is the vacuum hose if you have one long enough and can safely access the roof with it - then access from the inside as well.Hope that helps some.- Joe

My experience with the above mentioned-citi-data.com- never tried it, will check it outcounty tax assessor- lists the owners address as the abandoned propertyradaris- always get a disconnected number411.com- same as aboveInvestor friendly RE agent- I have several broker friends but they all said they have no special program to find owners

Disconnected #, or wrong #, what is a good lead generator to use. im in the so cal area...

Since acquiring the building, I have had all active knob and tube completely disconnected. 

just disconnect. 

Does anyone here think that the behaviors mentioned in the Asian Journal, etc, are completely isolated examples, disconnected from the rest of society?

If you could prove the tenant abused the machines or disconnected them and then hooked them up wrong, you may have a case.