Ventilation for a back boiler

phawley · 20 Dec 2008

Hi all
A question regarding back boilers.
My brother in law has central heating supplied by a back boiler and at the opposite side of the room he has a vent in the wall which is the size of a brick.
He has been told that the vent is incorrect and that he will have to have it changed before the next service.
As he has asked me to change it for him can anyone give me some information as to what type of vent he needs to comply with the current regulations.

Thanks in advance
Paul

gavinda · 20 Dec 2008

you can use a white one or abrown one. hopefully it will have some holes in it. you may need to put it on the wall too.

kthxbai

kirkgas · 20 Dec 2008

the reply you got was because you gave nowhere near enough info, tell us make and model of fire and boiler, the vent size will be somewhere between 60-100 cm2 and once you know exact size you can choose a suitable model either through the wall or in the window

gavinda · 20 Dec 2008

yeah, my transducer coil on my crystal ball burtn out this morning. well ****ed of as it will cost me at least 40,000,000 graots to replace and they cant get me a new one until the next blue moon.

what we need is the kw ratiing of the boiler. has he go the book for it?

phawley · 20 Dec 2008

gavinda said:
yeah, my transducer coil on my crystal ball burtn out this morning. well p****d of as it will cost me at least 40,000,000 graots to replace and they cant get me a new one until the next blue moon.

what we need is the kw ratiing of the boiler. has he go the book for it?

You could have said in the first post without the sarcasm we are not all experts in other peoples fields, that is why this forum exists, to try to help people out.

inasnum · 20 Dec 2008

I had the same issue with my Baxi Bermuda Back Boiler - google for a 100CM Stadium Vent, this will meet the current regulations.

phawley · 20 Dec 2008

inasnum said:
I had the same issue with my Baxi Bermuda Back Boiler - google for a 100CM Stadium Vent, this will meet the current regulations.

Cheers

lightning · 20 Dec 2008

If range rated take the highest heat input

heres an eg back boiler 18kw gross
fire 7 kw gross

add then together 25 kw gross

divide to get net 25 divide 1.1 =22.72 kw net
take off 7 for adv air =15.72 kw net
x by 5 = 78.63 cm 2 vent is required

no point putting larger vent if not required

namsag · 20 Dec 2008

Lightning not strictly true MI will sometimes give a figure that is req Baxi do and it doesn`t match up to calcs

lightning · 20 Dec 2008

see you learn something every day will rembember that for acs in march time

bengasman · 20 Dec 2008

phawley said:
gavinda said:

yeah, my transducer coil on my crystal ball burtn out this morning. well p****d of as it will cost me at least 40,000,000 graots to replace and they cant get me a new one until the next blue moon.

what we need is the kw ratiing of the boiler. has he go the book for it?

Click to expand...

You could have said in the first post without the sarcasm we are not all experts in other peoples fields, that is why this forum exists, to try to help people out.

You may not be an expert, but even a non-expert should be able to work out exactly when to read: "read this before you post" at the top of the forum

phawley · 20 Dec 2008

Thanks for the sensible and informative replies guys I'll leave this thread before the other Rsoles take over.

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Ventilation for a back boiler

namsag

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