Trickle vents

awnow

I have read numerous posts on using trickle vents for background ventilation in dwellings. If someone could point me to a thread which specifically answers the following I would be grateful.

1. What is the current requirement for background ventilation in dwellings? Is it 6500mm sq for each habitable rooom in the current Part F regs? (I couldn't find any mention of 6500m sq. in the 2009 Part F document.)

2. Is there a requirement for background (natural) ventilation on top of mechanical ventilation in areas such as bathrooms, WC's, utility rooms and kitchens?

3. What is the requirement for ventilation in areas such as halls/foyers?

I would appreciate if someone could give me a direct answer to these questions as I have reviewed several posts and Part F but am still confused

awnow

awnow wrote: »

2. Is there a requirement for background (natural) ventilation on top of mechanical ventilation in areas such as bathrooms, WC's, utility rooms and kitchens?

I meant "mechanical extract" instead of "mechanical ventilation" in this point.

Carlow52

Part F 2009 tells me the following

" Ventilation Rates
1.2.2.1 Where the air permeability is
5m3/(h.m2) or greater, the minimum total
equivalent area of background ventilators
providing general ventilation should be 30,000
mm2 with an additional 5,000 mm2 for each
additional 10 m2 floor area above the first 70m2
of floor area measured. For single storey
dwellings situated at ground level or on any
storey up to four storeys, an additional 5,000
mm2 per dwelling should be provided. Where
air permeability is less than 5m3/(h.m2) all
equivalent areas stated above should be
increased by 40%. As noted in Paragraph
1.1.15, the areas specified should be
increased by 25% where free area of
ventilators is used instead of equivalent area.
Example calculations are provided in Appendix
1."

So we need to know the air permeability of the dwelling.

Table 1 and Diagram 4 on page 14 spell it out pretty much for a typical dwelling, am not going to repeat it here
see it here http://www.environ.ie/en/TGD/

The ans to ur Q2 is yes, see above for where to find answers.

Halls, foyers are not classed as habitable rooms so there are no specific requirements as can be seen from the example is appendix 1 page 29

awnow

thanks carlow52. I had another read through and it makes sense.