need new boiler - thoughts on brands, size...??

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Old 01-02-18, 11:06 AM
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need new boiler - thoughts on brands, size...??

Greetings all!

Whelp, our Munchkin 80M finally pooped out after at least 15 (probably more like 20) years. Looking for a replacement. The space is a 1st floor apartment, about 1100 sq ft, 8 radiators (front hall, back hall, 2 bedrooms, small bath, kitchen, pantry).

2nd floor has it's own system. Basement not heated.

Any questions I should ask, brands to avoid....? BTU's for this space??

TIA for any thoughts!
 
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Old 01-02-18, 11:22 AM
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That muchkin is a modulating boiler... Are you putting same type in?

1100 sq feet you need about 30kbtu. That munkin is 74k btu DOE.. Way oversized but the modulating probably saved you in that aspect as turn down is some 27kbtu... Probably running on low fire its whole life...

So the question is what direction are you wanting to go.. Mod con or simple on/off boiler.. Sizing now for proper heat load is important..

Wow only 15 years? Whats the issue with the boiler? If its not leaking its really not broken...
 
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Old 01-02-18, 11:28 AM
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Peerless pure fire is the smallest fired mod con I know of..

16-50k btu max..

Peerless® PUREFIRE®
 
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Old 01-02-18, 11:46 AM
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Thanks for the quick reply Super Moderator and Iawrosa!

Not sure what type I will be putting in. Having someone out today for a quote as gas/electric/plumbing is more than I can tackle myself.

Boiler may be 25-30 years old for all I know, but as I said it's *at least* 15 years old. No records from the previous-previous owner on the Munchkin as to when it was installed. Yes, I agree, an investment like this should last longer than 15 years...!!!

Previous owner and I have had minor issues with Munchkin for the past 10 years. New circulating pump put in 3 years ago, other random parts put in prior to that. New blower put in a year ago. Heating guy who came out 2x to "service" did NOT service, from what I can tell. Lots of water/grit in the combustion chamber, condensation was not draining. That was cleaned out. Also needed new boiler door (gasket was gone), burner (old one was corroded), and other bits. Kept getting F09 error code even after replacing. NEW service guy (from a proper heating/cooling place!) took a combustion analyzer to it thinking that it was not getting enough (or too much) gas. Would fire up but only heat to about 80 deg, then show the F09 code again. Verdict: Modulator toast. Repair/tech guys said stop buying parts and replace it.

That's my story and I'm stickin' to it! SIGH.... TIA again for your thoughts!
 
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Old 01-02-18, 12:14 PM
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Do you have cast iron radiators? Or baseboard copper?
 
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Old 01-02-18, 12:24 PM
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Crusty lovely beautiful fancy heavy-as-sh*t cast iron!
 
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Old 01-02-18, 01:45 PM
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Some other thoughts entered my head regarding getting a new boiler:

Probably will stick w/ modulating, the pipes are set up for it.

Our house is over 100 yrs old. No insulation between 1st/2nd floors. Original windows, some of which are a tad drafty (no judgement please, in a perfect world I would have new windows put in, really not financially feasible right now). No heaters in basement other than radiator pipes/hot water pipes.

I assume this would affect the BTU's/size of boiler I would need?

TIA
 
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Old 01-02-18, 06:37 PM
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For drafty yes probably 40 k btu.. But thats just doing a simple math calc per sq ft of home.

Rads means a boiler bypass if you went to cast or pipe primary secondary as you probably are now... But I would have to see if you actually have P/S with that munchkin...

Youll be spending maybe 4 k on the boiler itself with no labor...

I guess a PF 80 wouldnt kill you as it mods down to 20k....

https://www.supplyhouse.com/Peerless...-Boiler-LP-Gas

How do you heat the hot water? Any need for an indirect?

Burnham is another. The alpine 80...

Residential Boiler Heating Products | U.S. Boiler Company

I would stay away from the Weil mclains... But thats just me...
 
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