adding radiators to steam heat system

tzbuild

Thanks for your response, Ken, now I just have to figure out the radiant area for the radiator(Circumfrence x length of radiator pipes right?)
Tom

tzbuild

adding additional radiators in gas single steam heat system

59286.1

I have a gas heated steam heat boiler system with 1 1/4" copper verticle risers from the main feed in the basement to supply each radiator separately. My question - is it ok to plan to share radiators from one riser, either teeing off to two separate radiators in adjacent rooms or sharing a common verticle riser to branch off to supply two radiators, one above the other? I am adding a couple of new radiators to heat additional rooms in my addition, and this would save me from running risers from the basement up thru 2 floors for two small(bathroom) rooms. I have seen older existing homes here in Maryland with this "sharing" and wonder if anyone has encountered any problems with this.All radiators have the relief valve and redrain fine back to the boiler. Boiler is a Williamson 180.000btu gas @ 3 yrs old replacing the old similiar boiler from house. Copper and all pipes seem to be around the age of the house @ 50 yrs as there was no rebuilding done during this time. (old bath and kitchen was all old copper in good working condition). Main horizontal feed line in bsmt is all 2" copper from boiler to return with 2 normal relief vents in line, at end. Tees off the 2" line are 1 1/4" to the cast iron narrow (@4" wide) radiators size from @ 2' to 52 " long depending on room size. Not a big house so only 1rst and second floors, 5 on first floor, currently 5 on second floor, would like 2 more on 2nd floor. single line ( steam and return water) system.

hope this gives more info

Thanks

Tom


Thanks for you input

tz

tzbuild

adding additional radiators in gas single steam heat system

59286.1

I have a gas heated steam heat boiler system with 1 1/4" copper verticle risers from the main feed in the basement to supply each radiator separately. My question - is it ok to plan to share radiators from one riser, either teeing off to two separate radiators in adjacent rooms or sharing a common verticle riser to branch off to supply two radiators, one above the other? I am adding a couple of new radiators to heat additional rooms in my addition, and this would save me from running risers from the basement up thru 2 floors for two small(bathroom) rooms. I have seen older existing homes here in Maryland with this "sharing" and wonder if anyone has encountered any problems with this.All radiators have the relief valve and redrain fine back to the boiler. House heats up nice and quick, reaches 2nd floor just fine.Boiler is a Williamson 180.000btu gas @ 3 yrs old replacing the old similiar boiler from house. Copper and all pipes seem to be around the age of the house @ 50 yrs as there was no rebuilding done during this time. (old bath and kitchen was all old copper in good working condition). Main horizontal feed line in bsmt is all 2" copper from boiler to return with 2 normal relief vents in line, at end. Tees off the 2" line are 1 1/4" to the cast iron narrow (@4" wide) radiators size from @ 2' to 52 " long depending on room size. Not a big house so only 1rst and second floors, 5 on first floor, currently 5 on second floor, would like 2 more on 2nd floor. single line ( steam and return water) system.

hope this gives more info

Thanks

Tom


Thanks for you input

tz

Ken_8

Yes, you can split the riser take-offs...

Provided the math is still correct, i.e., you can only get so much steam through a riser and its "take-off(s)" (the branches that actually feed each rad) - and still maintain adequate room for the returning condensate to pass by without the two negatives occuring; one being water hammer; two, "wet" (lost much of its energy) steam.

There are simple engineering tables for this. Generally, here's the MAXIMUM amount of SFR (square feet of radtaion) you can connect to the following pipe diameter/risers/take-offs:

1" = 28 SFR

1¼ = 64 SFR

1½ = 92 SFR

2 = 168 SFR

Does that help?



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Steamhead

Do a heat-loss on the rooms

to see how many BTUs you need. Divide BTU per hour by 240 to get square feet of radiation needed. Then see if the pipes can handle it.

Did you say the entire steam system was piped in copper?

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