Boiler Ratings Explained

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Boiler Ratings Explained

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KiwiFella

Thanks heaps for the explanation.
Im a learner DIY'er when it comes to plumbing & wonder if the cooker with a boiler within it, is going to be as large as I am hoping. You have answered quite a few query's I have had.
Many thanks.
This web site has helped heaps for the 2 plus yrs I have received its weekly posting. Many thanks all you contributrs

DanHolohan

Thanks!

steamfitter

Another great one for the archives! Years ago, before I read this article, I was not able to really wrap my head around the pick-up factor.
This article cleared things up for me!
Dan's way of writing breaks up the scientific mumbo-jumbo and totally clarifies it in such a way that I can now teach it to my apprentices with confidence.
The "power of Holohan" passes knowledge down to many people, so that they can teach many more. A ripple effect if you will.
And I am grateful for that.
Thanks Dan!

steamfitter

May I add a word of thanks to Erin for posting these gems which allow us to enjoy them again and continue the education!
Thank you Erin!

Erin Holohan Haskell

Thanks, @steamfitter!

DanHolohan

Thanks @steamfitter

Jackmartin

Good post, things get even more difficult when someone installs a condensing boiler. This high effiency is great for swimming pools and radiant heat as the water temperature is low enough for condensation of flue gases to take place. Try telling a customer with fin tube, no condensation. and the 95 percent boiler he bought to save loads of money is like a politicans promise all talk, no do, gets ugly very quickly. All the best Jack

SteamCrazy

Great info. Thank you so much. I must say I'm fairly new to this but I caught the bug Dan and Erin I have become a Steam Junkie and I can't get enough lol. I have a older Victorian home from 1896 and I'm working redoing the steam system. Excited!

Erin Holohan Haskell

SteamCrazy said:

Great info. Thank you so much. I must say I'm fairly new to this but I caught the bug Dan and Erin I have become a Steam Junkie and I can't get enough lol. I have a older Victorian home from 1896 and I'm working redoing the steam system. Excited!

This makes my day. Thanks!

DanHolohan

Mine too! Thanks.

Solid_Fuel_Man

One thing I've been curious about is the two different output ratings for a given boiler, one for steam, one for water. Same boiler, same burner, same input.

Jamie Hall

Solid_Fuel_Man said:

One thing I've been curious about is the two different output ratings for a given boiler, one for steam, one for water. Same boiler, same burner, same input.

Couldn't say for sure, but I'd guess a combination of lower temperature of the water and increased heat transfer area due to being filled with water? The heat transfer area above the water line in a steam boiler doesn't contribute much to steaming, after all, although one could think of it as a remarkably poor superheater… dry the steam a little...