Another boiler recommendation question...

[Andy Champ]

This time for a specific location. House with plumbing invented in the

60s, the boiler and plumbing aren't on an outside wall - and the nearest one happens to be under a canopy where you really wouldn't want a plume of steam.

The current flue runs up the old chimney, the boiler is a big free-standing jobby in the kitchen, there's even an airbrick to make sure it gets fed. Is there a modern boiler that could go in there?

Andy

[Andy Hall]

ONe of several types that use 50mm plastic tube as flue and intake - e.g. Viessmann, MAN and some other German brands. This could either be run via a quite tortuous route to an outside wall location or even up the chimney.

[John Stumbles]

There are some boilers which can take a plastic pipe up the chimney. Halstead I think is one, can't remember the other (or it may have been a separate flue kit that could be used with different boilers).

You'll probably need a condensate pump too, but these can be had for 70 or so notes.

[Ed Sirett]

... if it's dead straight (which it might be in a 60s flat).

[Andy Champ]

Yes but it's a house.

Thanks for the hints guys, now I know they exist. It's a chalet style house, and there's a bit of roof not far away in 2-inch pipe terms. It's also right next to the washing machine, so a condensate drain shouldn't be a problem.

Though I do wonder what mildly acid condensate will do to a ceramic-and-cement drain system. Though this is on chalk, so probably just clear away 30 years of scale.

Andy

[Andy Hall]

Shouldn't be a problem because it will be heavily diluted with water from normal uses.

However, if it bothers you, another option is to run the condensate to a soakaway or to insert a neutralising device such as a Salamander Condensafe on the way to the drain.

You can do reasonable lengths of condensate drain internally using

21-22mm plastic overflow pipe, but outside runs should be in 32mm (or more) with a slope so that there is no impact from freezing.