Hi guys, I'm posting here hoping to get some advice with a cold section of the house that I'm remodeling into a rental unit. I want the unit to be as comfortable as possible, and the heating currently in place is just not up to par. The main heat for the house is 2 pipe steam, and I have no issues with the main house. Granted, the main house appears to be original piping to the Boiler, and the rental is in an added on wing of the house and was done much later.
I've tried getting some advice from local heating companies, but I have had some serious doubt about their advice. One company advised me to put vents in my rads, which I am fairly certain is a bad idea on 2 pipe steam? The other company hasn't gotten back to me at all, even after 2 calls. I just am not sure if anyone is equipped to handle this issue in my area (Dubuque, IA). I don't even know if anyone will touch the pipes due to the apparent asbestos slathered over them. I'm at the end of my rope here. I need to get this remodel finished and the other unit rented, but I don't have money to cover an asbestos mitigation job. I've done asbestos removal myself before, and I'm willing to tackle anything. I'm not new to working on plumbing, this is just my first steam system and I'm intimidated to say the least.
I attached some photos of my dilemma. I labeled the pipes and where they go. My main issue is with the labelled sections.
In the first photo, (A) is a main riser for the house. It continues into photo #3, where it branches off towards the rental unit (B). In photo #4, this is where I think there were changes made. (B) continues into the main house bathroom and kitchen. There are 3 Rads on (B). The branch into the rental unit, (C), continues into photo #5. (C) connects to 4 Rads, so 7 total Rads on this riser, and by far the longest distance in the house from the boiler.
Interesting side note, when I close off enough Rads in the main house, the rental unit Rads heat up just fine. Is this just a case of too long of a run from the boiler? Too many Rads on this riser? How do I fix this?