replacement boiler

Old 01-20-07, 07:06 AM
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Question replacement boiler

Hi there, I'm new to all this and I'm looking for some good advice. I'm looking to replace an older oil fired steam boiler~30 y.o. I have gotten quotes from 3 local companies all with different products:
Penco # 160-4 HSD (112,500) BTU input gas steam boiler
Weil McLain gas PEG50SPDNS
Weil McLain oil PSG04
Lennox GSB8 E/S
How do these boilers compare to each other? Any have more problematic issues over time, etc?
Other info you might want:
91 yo house, capital region of NY, 7 radiators(some with adj. valves).
Thanks for any help.
Old 01-20-07, 07:50 AM
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The first question to ask is:

Did they do an ACCURATE heat loss calculation on the home ?

I don't mean just walk through and glance around and say "Oh, 110,000 oughta do it" ...

Yer gonna live with that system (hopefully) for a long time, why take the chance that it's oversized ?

My choices would be Buderus or Burnham .
Old 01-20-07, 11:01 AM
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How do I get the heat loss calc? One guy looked around to see the radiators, but did not actually measure. I have 7 cast iron radiators;
(in inches) (# tubes)
23*16*4 10
32*24*8 16
40*17*4.5 26
40*17*5.5 26
42*17*4.5 28
42*17*4.5 28
48*17*4.5 32

I think all are column type ~ 1 inch diameter. Living space ~1300 sq ft, 2 story house. Any other needed to know?
Old 01-20-07, 11:15 AM
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New steam boiler

I don't think Buderus makes steam boilers. The Burnham Mega-Steam has so far gotten very good reviews.
Before even thinking about a particular boiler you need to get an accurate heat loss calculation done. Slant Fin has a good, free program on their web site. Once that is done, the capacity of the existing radiation has to be calculated & compared to the heat loss. If you don't plan on renovating the radiation, the heat loss can be skipped & the new boiler matched to the existing radiators. This is something peculiar to steam. Dan Holohan has an excellent book on old radiators called "E.D.R." available here:

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