Ventilation of old E Type Boiler Query

[Steelmasons]

BTW... Free area for a pipe with a CSA of 100mm would be 78.5 cm2.

 

[Competent DIYer]

Extract from the boiler manual " An adequate supply of fresh air for combustion and ventilation must be avilable to ensure safe and efficient operation of the boiler. Where the appliance is installed in a room (which it is) purpose designed ventillation must be provided in an outside wall of the building (which is has - debateable wether to keep extractor commissioned or not). The opening may be either (a) directly into the room containing the appliance (which it is) or (b) into an adjacent room or space which has an internal purpose-provided opening to the room containing the appliance. The minimum effective areas of all purpose-designed ventilation openings must be
CF 105N, 155cm2 (24ins2)
The total area of two four inch pipes is 162cm2.

I fail to see how the arrangement that I have is not compliant, the boiler manual does go on to quote figures akin to what you mention above, but only where the boiler is situated in a cupboard

 

[Steelmasons]

9ft x 5ft would be catogorised as a COMPARTMENT.

 

[Competent DIYer]

Yup your right - i assumed they were 4 inch - just measured em they are actually 10cm so agree with your CSA of 78.5cm2, which for 2 pipes is 157cm2 which exceeds the required 155cm2

 

[Competent DIYer]

By whose definition?

 

[Steelmasons]

By whose definition?

Industry standards.
You've been proved wrong on all counts so far so stop arguing the toss....if I were you I'd give it up and seek professional advice.

 

[Competent DIYer]

Full ceiling height, full sized door 315 cubic feet of space!

 

[Steelmasons]

Ceiling height being a moot point when categorising a room or compartment.

 

[Terrywookfit]

9ft x 5ft would be catogorised as a COMPARTMENT.

Most houses have bath and bedrooms with smaller floor area!!

 

[Steelmasons]

Most houses have bath and bedrooms with n/a floor area!!

So how would you classify it?

 

[Steelmasons]

Whoever installed the high and low ventilation obviously deemed it as a compartment..

 

[Competent DIYer]

same ceiling height as the corridor and the room next to it - some "compartments" this size sell for hundreds of 000's in London

 

[Competent DIYer]

they obviously didn't classify it as a compartment as they would have made the pipes larger - they didn't have to so they didn't do so.

 

[Steelmasons]

What was the point of this thread if in your opinion the ventilation is adequate?

 

[Competent DIYer]

just wanted it sense checked by an ethical individual better informed than myself