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Vent Question

John Doll
John Doll Member Posts: 25
in THE MAIN WALL
We had an addition put on our house this summer. Everything has worked out well except for the heat. The house is 100 years old and has one pipe steam. The new area has a hot water loop running and the rest of the house has a mix of steam radiators (sun rad, baseboard and the big standing column types). There have been several modifications over the last 100 years and everything worked well before the construstion. The plumber was not familiar with steam and did a poor job with the hot water loop. He tried several things to fix it (before I got Dan's homeowner guide and learned the real issue). Many of the attempted fixes included changing the vents on many of the rads because we "had to relieve some of the pressure". I believe most of the rads had gorton 6's. Now many of them have C's and D's. Specifics are as follows in order off the main:

- 1st floor baseboard in a cold room #C
- 2nd floor column rad and 3rd floor baseboard (added later) both with #4 - these rooms are extremely hot
- 1st floor sun rad with #6
- 1st floor sun rad in hot room with #4
- 1st floor baseboard with varivent
- 2nd floor column rad with #C
- 2nd floor column rad with #D
- 1st floor baseboard in room with thermostat #4
- 1st floor baseboard #C
- 2nd floor column rad with #6

The plumber also replaced the main vent. Any thoughts on why the two rooms with #4 are getting incredibly warm. This was never an issue before. The weird thing about these radiators is the pipe off the main is only 1 inch. All of the other pipers are 1 1/4.

Sorry for the long message. Any help would be appreciated. Should I try and replace all the vents with #6's. It doesn't seem like this should cause the other radiators to heat up quicker.

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