Talk:Condensing boiler

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[edit] Extra Requirements

They have a reputation for being less reliable and require professional installational and regular service and may suffer for the lack of familiarity with them among installers and plumbers. In reality, gas condensing boilers have only one extra element to be installed - the drain pipe for the condensate collected during operation.

Is this really true? I believe they also require a second pump to be installed at the top of the system (ie near the hot water cylinder) - which involves laying a new electrical cable through most of your house. See point 6 here: http://www.miketheboilerman.com/newboilercost.htm —Preceding unsigned comment added by Wogone (talk • contribs) 16:08, 24 March 2008 (UTC)

I have a Weil-McLain gas condensing boiler. Yes, it keeps the boiler circulator pump (mounted just a few inches above and wired directly into the boiler) running for a short time. It does require an extra pump because the boiler circulator pump is separate from the system circulator pump(s). VMS Mosaic (talk) 17:39, 24 March 2008 (UTC)

[edit] Confusing

The final exhaust from a condensing boiler is, obviously, at a lower temperature than from a conventional boiler. As a result a fan is usually required to expel it, and it produces a visible "plume" of condensing water vapour.

If the water is already condensed, why would we see a plume? This sounds like two different designs getting confused. --njh 01:08, 15 March 2006 (UTC)

The final heat exchanger cools the exhaust to approximately room temperature. This causes some water to condense out of the exhaust. When the remaining exhaust is vented to the cold exterior, more water condenses. Each decrease in temperature results in additional condensation. —Ryanrs 15:31, 13 May 2006 (UTC)

[edit] Globalize

I think this topic can be moved to the global catagory... as it now includes content from north america (206.116.24.2 02:02, 5 March 2007 (UTC))

[edit] Reversions

Someone (I haven't tracked back to find out who, but there have been a lot of anon edits on this page) had removed all the wiki links and US-ised the spelling. I have reverted a lot of these changes; if you object, please comment here. No big deal, but just for information if you're a newcomer (a) that sort of wholesale change to a page shouldn't usually be done without first proposing it on the Talk page to check there aren't good reasons not to do it and (b) to stop time-wasting edit wars over spelling conventions, wikipedia works on the rule that whichever spelling variant the page is started in, it stays in (unless its subject matter makes US spelling obviously more appropriate than international, or vice versa). Also, (c) if you revert someone's edits it is polite to explain why on the Talk page, which is why I am adding this note. seglea 21:07, 17 June 2007 (UTC)

Vapor/Vapour was spelled both ways in the very first edit, so there is no established spelling based on a starting variant. In any case, if you want to change the spelling to "vapour", then please do so for the entire article per WP:ENGVAR. If you make the article's spelling consistent, I will not revert it. --VMS Mosaic 22:31, 17 June 2007 (UTC)
Ah yes, I'd missed one, sorry. I'm not greatly bothered about this issue (I'm happy to write with either set of conventions), but as it happens the initial edit was wholly in international spelling (I wrote it, in March 2006 - note that "vaporize" has no "u" in any spelling variant, though that ise/ize thing still lurks). There is a (slightly) more cogent case for using international spelling since these things are more in use in Europe than in North America. So I have put it back to "vapour", throughout now, I hope.
BTW, the table layout that someone introduced looks nice but behaves oddly if you change the page width, does anyone know how to fix that?
seglea 18:21, 18 June 2007 (UTC)

[edit] Safety

Does anyone have any knowledge of safety issues with condensing boilers? I am interested in a fatal accident involving one which may be relevant to this type of boiler; can this issue be addressed? Peter 07:21, 27 March 2008 (UTC)~

A properly designed and installed condensing boiler should not have any significant safety issues beyond those of other types of boilers. Because they are direct vented, they are safer than non-power vented boilers because carbon monoxide is much less of an issue (assuming the venting is properly installed). VMS Mosaic (talk) 17:24, 27 March 2008 (UTC)