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Under-Radiated 1st Floor - Hot 2nd Floor
I'm in the process of wringing out many issues with the 1-pipe steam system in the house we just purchased... more details will come in an update to my previous post.
However, I have one question in the meantime.
Our system is almost balanced (new drop header, main venting, vaporstat installed, etc). However, in order to keep even heat throughout the house, I've had to turn off one of the two radiators in each room on the 2nd floor.
You see, at some point in the past, a previous owner replaced ALL the 5-tube radiators on the 1st floor with Convectors in cabinets. I can tell when I look up at the floor from the basement... I can see where the pipes USED to go up through the floor... farther out into the room than they do now.
On the 2nd floor, all of the original 5-tube radiators still exist... 2 per room.
As a result, the radiation on the 1st floor is much less than the 2nd floor.
Of course, the thermostat is in the Living Room on the 1st floor. AND, in addition to replacing the radiator in this room with a convector, they also REMOVED one of the 2 units in this room... so the thermostat is in the most under-radiated room in the house.
As I said, I've turned off some radiators upstairs to prevent overheating... but now that I'm close to being able to balance my system (after all the improvements), I'm getting a lot of hissing/whistling from radiators upstairs... I'm assuming because I've choked the system down so much to keep even heat. Once it reaches cutoff point, the Vaporstat is cycling on and off every 45 seconds or so.
SO, does anyone have any thoughts as to how to re-activate all the turned-off radiators to alleviate the pressure issue, but also keep the 2nd floor from getting too hot while the 1st floor takes its sweet time to get up to temperature?
Thanks in advance for any ideas.