Sizing boiler for oversized system piping w/ iron radiators

Unknown

I'm drawing a blank on where to look up the percentage to add for various situations on hot water retrofit boilers with oversized mains.

I'd like to be able to confirm some things....

Noel

Unknown

I'm looking for charts or guides published

I'm drawing a blank on where to look up the percentage to add for various situations on hot water retrofit boilers with oversized mains.

I'd like to be able to confirm some things....

Noel

bob young

ask Dan

years ago i had a similar problem & the gents at wallace ennis helped me out.

Mike T., Swampeast MO

If you find, please share. Have looked deeply myself.

My best guess is to add nothing unless the basement or crawlspace has exceptionally high infiltration or exposure.

Heat loss calcs usually have the basement/crawlspace at a lower temp than actual. The heat liberated down there only reduces loss in the space above. No air pressurization problems with hydronics, so the situation tends to cancel itself out.

Unknown

Here you go, Mike

http://www.heatinghelp.com/pdfs/143.pdf

Right here in the library.

Thanks, Dan.

Noel

Mike T., Swampeast MO

Noel

Link doesn't seem to work. What's the section and title.

I need to revisit "The Library" MUCH has been added...

Unknown

older hot water heating systems

the third one down is an old I C S course from 1907.

Boiler sizing and derating for lower temperatures are in there. I'm still reading up on it.

Noel

Unknown

Perfect timing

This agrees with what I've been discovering this week.

Thanks, Dan. I really can use this info on a real situation this week.

http://www.pmengineer.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2732,161636,00.html

Noel