Steam boiler sizing

AJ1

I am a newbie but with some help from the internet I am trying to size the steam boiler I will need.

I am replacing an old oil fired boiler to a gas fired steam boiler.

These are the sizes for the radiators:



Width of each column on "Old

Raditor" = 3.5 inches



26" * 11 (Sections) * 2 Columns ("old raditor style"..see attached pic)









22" * 11 (Sections) * 2 Columns ("old raditor style"..see attached pic)







22" * 11 (Sections) * 2 Columns ("old raditor style"..see attached pic)







36" * 6 (Sections) * 2 Columns ("old raditor style"..see attached pic)







36" * 6 (Sections) * 2 Columns ("old raditor style"..see attached pic)







25" * 6 (section) * 4 Tubes ("new raditor style"..see attached pic)







25" * 10 (section) * 4

Tubes ("new raditor style"..see attached pic)







25" * 10 (section) * 4 Tubes ("new raditor style"..see attached pic)







Toilet has Wall raditor the diamenion is 29 inches  Length * 22 Inches

High * 6 inches deep... it is setup in between the bathroom wall...I

think this type of radiator is called WALL RADITOR







Total 9 Raditors.I have measured the height from the floor to

the top of the Radiator.



PER MY CALCULATION MY TOTAL SQ FT EDR IS 267.CAN YOU EXPERTS VERFIY THIS.



SECONDLY I AM LOOKING AT A BOILER SPEC SHEET AND THE COLUMN "IBR NET RATING STEAM SQ FT BOILER" IS THEO NE THAT SHALL BE CLOSET TO 269.CORRECT.if so it tell me 64000 btu/hr ibr net rating.i dont understand what is doe rating...all in all what should be the size of the bolier..my installer is ball parking it at 446 ibr sq ft.



should i go with his ballpark...what downside or upside i have going with his recommendation...please help...i have attached pics of the radiators..

nicholas bonham-carter

should be in strictly steam"

why not move this to the "strictly steam" here?--nbc

AJ1

how do I

move this into the steam thread..