TGD part F query

Dr. L Sanchez

Hey I’d be grateful if anyone could let me know when the new TGD part F – ventilation will be published and when is it expected to come into effect?

cheers

sinnerboy

http://www.environ.ie/en/TGD/

Dr. L Sanchez

I came across a 2008 draft copy and I was wondering if there had been any further development.

http://www.environ.ie/en/DevelopmentandHousing/BuildingStandards/PublicConsultations/PublicConsultationsArchive/

I’ll keep an eye on that website

Cheers

sydthebeat

[FONT=&quot]email from buildingstandards@environ.ie
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[/FONT]
[FONT=&quot]"Good morning all,[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Building Regulations (Part F Amendment) Regulations 2009 were signed on 22 December 2009 and are now published on the Department's website. The link below will bring you to the Regulations.[/FONT]
[FONT=&quot]http://www.environ.ie/en/Legislation/DevelopmentandHousing/BuildingStandards/FileDownLoad,21942,en.pdf[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]A further email will issue early in the new year to notify you when TGD F 2009 is published.[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Best wishes for the festive season.[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Regards[/FONT]
[FONT=&quot] [/FONT]
[FONT=&quot]Mary Lane"[/FONT]

beyondpassive

http://www.environ.ie/en/Legislation/DevelopmentandHousing/BuildingStandards/FileDownLoad,17944,en.pdf

'The equivalent area of background ventilator should be increased by 50% where an infiltration rate of less than 7m3/m2h at pressure difference of 50Pa is measured or assumed for the purposes of calculating energy use and CO2 emissions using the DEAP methodology.'

Thats a big hole in the wall vent, looks like MHRV is becoming more attractive now.

The regs suggest about 30l/s for a 100m2 building. A 60l/s rated system should cover most modest houses.
The biggest issue for irish houses is Condensation. If you heat a house to 22 degrees, the 0.27 cavity walls will perform at aabout a u-value of 0.6 due to cold bridging and ineffectivness of PIR board. This will give an internal surface temnperature of about 10-15 degrees during the heating season. This is near or below dew point. You can see this problem manifesting itself in all the celtic tiger stock. The water vapour taken up in kitchens and living rooms condenses in the coldest bedroom. This is reducing the lifespan of the structure. As you increase insulation in a building two things happen, you raise the temperature of the air increasing its ability to hold moisture and you increase the difference in effectivness of planer elements relative to junctions of flanking planer elements. An effective ventilation strategy reduces the ability of the air to hold moisture. Cross flow ventilation dosent work for most circumstances as it offers no control and is dependant on outside temperature, pressure and winds.

The asset value of a building that is not well insulated, relativly cold bridge free and mechanically ventilated, will be significantly reduced in the next decade. Its a good thing that the 2010 regs will be close to Passive, MHRV will be soon be as good as mandatory. There will be a need for Technically minded architectural professionals, Its only a pity that architectural technicians have not developed recognised scientific skills in low energy building techniques, which analyse energy demand, moisture and comfort similtainiously. Deap is a very simplistic asset rating tool and its modelling bears little resemblance to the performance of the finished building. Its good to see tha some of my former Arch Tech colleagues are using PHPP, Therm and on site blowers and thermographic cameras to build near passive. It might be worthwhile if out of work technicians got together to develope skills in this area and share knowledge. We all know in our hearts that Waiting for ************to develope a post Grad or for the market to recover in the next five years is hopeless.

sinnerboy

http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1647,en.pdf

Dr. L Sanchez

thanks for the up date