hedgecutter
ArboristSite Lurker
I am helping a guy install a new Outside Wood Boiler in an old school house that has the old cast iron radiators which were originally used with steam. The the old two story school building is being used as a residence and is now being heated with four different propane fired forced air systems. We are planning on installing water to air plenum coils in the two forced are units for heating the first floor, but upstairs we want to use the old cast iron radiators (maybe 1900 vintage) by circulating hot water from the OWB up to a plate exchanger and then plumb two or three different closed loops using pumps and t-stats through the radiators. My question is how to plumb our lines into the cast iron radiators. Some of the rads have inlet/outlets on both the bottom and top on both ends and some on just the bottom. I was figuring the water temp to be around 170 to 180 F.
1. Would you plumb the hot water in the bottom and then out the top on opposite ends? In the bottom on one end then out the bottom on the opposite end? What is your opinion to maximize heat transfer?
2. What about pressure testing and flushing the rads? They have not been in service for decades and I assume there is some crust on the inside.
3. Any other advice or opinions on how to control or plumb this project.
Thanks
1. Would you plumb the hot water in the bottom and then out the top on opposite ends? In the bottom on one end then out the bottom on the opposite end? What is your opinion to maximize heat transfer?
2. What about pressure testing and flushing the rads? They have not been in service for decades and I assume there is some crust on the inside.
3. Any other advice or opinions on how to control or plumb this project.
Thanks