Is my boiler oversized ?

HQ

This is my first posting.
I'd like first to thank everyone on the Wall for teaching
me everything I know about steam heating. Reading the Wall
is so addictive.

My boiler is working fine; but I need your help to determine if my calculation is correct that the boiler is oversize.


Radiator made: American Standard,
5 tube type, 2.5" section-section

Room Height Sections Sq. Ft. Steam Sq. Ft. Steam
(inch) (per sec) (per radiator)
------------------------------------------
Foyer 38 14 5 70
DNing 38 9 5 45
Brm1 38 8 5 40
Brm2 38 8 5 40
Brm3 38 6 5 30
Brm4 38 6 5 30
Attic 38 4 5 20
LRm 20 20 2.67 53.3
Kit 20 13 2.67 34.7
Bth 18 8 2.25 18
-----------------------------------------
Total 381.0

System Info:
Installation date:
Single pipe steam:
Parallel flow system with Wet return + Hartford loop

Insulation: All the mains + returns
2 end of main vents: Gordon #2

Boiler Info: Weil-Mclain EG-50

Boiler Rating:

Input: 175000 Btuh
Output: 145000 Btuh
Sq. Ft. Steam: 454 (I hope this include 33% pickup factor)


Calculation:
(381/454)*100 = 83.92%

HQ

Is my boiler oversise ?

I'm a homeowner and This is my first posting.
I'd like first to thank everyone on the Wall for teaching
me everything I know about steam heating. Reading the Wall
is so addictive.

My boiler is working fine; but I need your help to determine if my calculation is correct that the boiler is oversize.

Foyer 38 14 5 70
DNing 38 9 5 45
Radiator made: American Standard, 5 tube type, 2.5" section-section

Height Sections Sq. Ft. Steam/section Sq. Ft. Steam/radiator

-----------------------------------------
Total 381.0

System Info:
Installation date:
Single pipe steam:
Parallel flow system with Wet return + Hartford loop

Insulation: All the mains + returns
2 end of main vents: Gordon #2

Boiler Info: Weil-Mclain EG-50

Boiler Rating:

Input: 175000 Btuh
Output: 145000 Btuh
Sq. Ft. Steam: 454 (I hope this include 33% pickup factor)


Calculation:
(381/454)*100 = 83.92%