You are a beast, a relentless power machine in awesome attire that radiates confidence and you are a force to be recconned with.

I'm looking at a duplex that currently has separate furnaces, both being boilers with radiant heat (radiators, not ceiling, floor or baseboard).

I was simply covering the issue of steam and moisture in the air.Now, as to source of heat - that can be radiator, electric baseboard or a vent register from a forced air system.

Situation:Multi-family with radiators in each room.

Are you baseboard or radiators?

I am looking at a house that has old radiators (the cast iron type). 

There's a home located on my block with frozen pipes and radiator damage that I'd like to buy.

I got a call tonight from my property manager stating 3 things:a) There was no heat coming from the radiator in one of the upstairs bedroomsb) the water in the kitchen was dripping slowlyc) A couple of the electrical outlets were not workingI would have expected that the PM would have had someone bleed the radiators to solve a) since that was obvious, and have one of their staff check out b) and c).

Air in the system can cause cold radiators but you said you had the system bled so that shouldnt be an issue any longer so I would take the seal up approach and work from there.

I then have to point out that the radiator being cold doesn't mean the heat is off, it just means the thermostat is satisfied.