Required ventilation?

[kris]

Just remember drains need to be air tested , but once test is done the vent pipes open to atmosphere, same with air test, certain parts will get covered and uncovered,

 

[Reg Man]

Depends on the fire, Fluless, Conventional, LFE, DFE and the Mi's instructions. Some of the DFE's require 100cmsq regardless of the 7kW. BS5871 parts 1 to 4.

 

[stevetheplumber]

mis are the main thing to look at but many will quote the relevant BS

 

[AlexGas]

Don't even mention no chimney flueless gas fires...

 

[firemant]

The 7Kw does not apply to newer homes. If the air permeability of the home is less than 5M3/h/M2, you do not have AA.

See lat line if small print PAGE 46:
http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2010.pdf

 

[snowhead]

The 7Kw does not apply to newer homes. If the air permeability of the home is less than 5M3/h/M2, you do not have AA.

See lat line if small print PAGE 46:
http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADJ_2010.pdf

And page 76 to see what needs to have been done to get anywhere near 5M3/h/M2

 

[lame plumber]

easy to see if all the holes are sealed, there's mildew all over the walls 🙂

 

[firemant]

And page 76 to see what needs to have been done to get anywhere near 5M3/h/M2

Good point SH, but the main thing is to be aware of the requirements, and in a new home ascertain the degree of air changes. Have you not noticed that fireplace openings are now often boarded over?

 

[Reg Man]

Refer to section 1.4 in part F. Part F must not be read in isolation of other building regulations such a part J.

 

[Baloo790]

I was always told under 7kw need no vent UNLESS evidence of draft proofing. New houses are sticky because I always asked what's a new house? 2 year old, 5 or 10. Regardless of bs, MI always over rule anyways.

 

[Reg Man]

Refer back to post 22. For instance: BS5871 part 3 section 8.2 100cm2 ventilation shall be provided unless manufacturers state otherwise. There is ventilation for breathing and ventilation for fossil fuel burning appliances; they are two different things.

 

[Reg Man]

BS5871 part 3 refers to DFE fires.