Plume levels from 1 or 2 boilers

[LordWest]

Hello,

We curently have a 50-year old non-condensing 68kW boiler for the communcal heating of my residential block, and we plan to replace it with either two 40kW condensing boilers or one 80kW condensing boiler. Because the flue(s) would be placed in the front of the building (lightwell in front lower ground floor) we are consious about the level of plume coming out. Which set up is likely to be less noticeable in terms of plume? A single boiler working at 50wK or two smaller boilers simultaneous working at 25kW?

Thanks

 

[Scott_D]

You will need to terminate above the lightwell

 

[LordWest]

You will need to terminate above the lightwell

Yes, the flue would come out from the highest part of one of the the lower ground floor vaults.

 

[Scott_D]

You could stagger the terminals
Its likely to be the same plumage from 2x25 as 1x50 at full blast

 

[LordWest]

You could stagger the terminals
Its likely to be the same plumage from 2x25 as 1x50 at full blast

ok thanks. i thought so.

 

[Last Plumber]

Has the installer not advised on this? surely they would have taken the matter into account, or have you not reached the stage of asking for an estimate yet?
If you haven't, I think that would be the best course of action. The Engineer who visits will be in a better position to give such advise. I do personally think two boilers are better than one in a commercial setting for a few different reasons but a lot governs what the best thing for your situation might be.