European airtightness association committee Internet Meeting
26/09/12
Slide 2
Participants Belgium: Xavier Loncour, Clarisse Mees (Observers)
Czech Republic: Jiri Novak (Asociace Blower Door CZ (A.BD.CZ))
Denmark: Walter Sebastian (Klimaskaerm) - Apologies France: Rmi
Pelini (Syneole) - Apologies Germany: Oliver Solcher (FliB) Italy:
Guenther Gantioler (ATTA) No answer ? Sweden: Eva Sikander
(Informal network in Sweden) UK: Rob Coxon, David Unwin, Tom Jones
(ATTMA) TightVent: Peter Wouters, Rmi Carri, Maria Kapsalaki
Slide 3
Agenda Review of previous action list Information within
committee Latest documents available on website (contact list,
review of applicable standards, summary of airtightness
requirements) Publication of AIVC-TightVent reports on air leakage
databases and summary of March workshop Feedback on Copenhagen
conference Information on ISO TC 163 / SC 1 / WG 10 work Status on
actions on airtightness measurements accuracy and precision /
calibration Discussion on questionnaire on competent tester schemes
Events (conferences, workshops and webinars) AOB Next meetings
Slide 4
New action list
Slide 5
Previous action list
Slide 6
Information within committee Latest documents available on
private area of TightVent website
http://tightvent.eu/partners/airtightness-testers- associations
Password is TVAAC2012, please do not disclose it. Now includes
contact list, review of applicable standards, summary of
airtightness requirements
Slide 7
Contact list
Slide 8
Summary of requirements
Slide 9
Review of standards
Slide 10
Publications
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Feedback on Copenhagen conference Over 160 particpants Over 100
presentations Summary of airtightness track will be published in
January issue of the REHVA journal and on AIVC and TightVent
websites Good feedback Number of total responses=67 Q4. Overall did
the conference meet your expectations?
Slide 12
Information on ISO TC 163 / SC 1 / WG 10 Mail from Oliver
Standards in the pipeline ISO 9972 Thermal performance of buildings
determination of air permeability of buildings Fan pressurization
method : CD to be submitted as DIS (Draft International Standard).
ISO 12569 Thermal performance of buildings Determination of air
change in buildings Tracer gas dilution method . FDIS was in
enquiry until 16/10/2012. ISO 14857 : Thermal performance in the
built environment Determination of air permeance of materials .
Canada wanted to include modifications to draft document. Was
foreseen to send it as FDIS for enquiry by the end of the year. ISO
16956 : Thermal performance in the built environment Determination
of Air flow Rate in Building applications by Field Measuring
Methods . First draft (CD) available but there are already 2 CEN
standards dealing with the same subject. Draft to be revised to be
consistent with CEN standard as much as possible. Also, the group
wants to work on 2 additional subjects: Measurement of ductwork
airtightness Measurement of the airtightness of large buildings
NOTE: ATTMA notes that what makes a large building difficult to
test is its height and/or partitions, not necessarily its size
Slide 13
Status on actions on airtightness measurements accuracy and
precision / calibration Can be an endless work Need to better
characterize the scope of the work WebEx was planned with TightVent
partners end of 2012 but had to be cancelled => Status idle
Slide 14
Questionnaire on competent tester scheme To be finalized by Jan
18 To be filled in by meeting attendees by Jan 31
Slide 15
Discussion on reference value used for airtightness indicator
Xavier Loncour suggests to conduct a comparison exercise on the
same building(s) to see to what extent different interpretations of
the reference values can affect the indicator However, it is
unclear whether this is an international exercise since we know
there is significant discrepancy in the values obtained by
technicians in the same country (e.g., on volumes, cold surface
areas, etc.)
Slide 16
Discussion on reference value used for airtightness indicator
The uncertainty on the reference value has a direct impact on the
uncertainty on the airtightness indicator 10% error on volume
implies 10% error on n50 value This may be important for compliance
to a given limit value of the airtightness indicator On the other
hand, this uncertainty can be eliminated in the energy calculation
since the energy calculation uses the total leakage flowrate For
example, assume energy use is calculated from the calculated
infiltration rate and degree-days where Einf is expressed in kWh,
Vbld is the buildings volume, and DD is the number of degree-days
in Kelvin days And assume ninf can be estimated with
Slide 17
Discussion on reference value used for airtightness indicator
Equation becomes And therefore the building volume has no influence
on the calculation of the energy use as long as you use the same
value for calculating the n50 as the one you use in the EP
calculation. The same conclusion can be drawn if the indicator is
normalized with the cold area. In sum, The uncertainty on the
reference value to normalize the airtightness indicator affects
directly the uncertainty on the airtightness indicator But, as long
as you use the same reference value to normalize the airtightness
as the one which is used in the EP calculation, there should be no
impact on the energy calculation.
Slide 18
Events Quality of ventilation systems in Brussels 18-19 March
2013 Airtightness workshop in Washington DC 18-19 April 2013
BUILDAIR symposium in Hannover 7-8 June 2013 AIVC-TightVent 2013
conference in Athens 25-26 September 2013
Slide 19
AOB
Slide 20
Next meetings Internet meeting Thursday 7 March 2013,
10:00-12:00 (WebEx) Physical meeting At BUILDAIR symposium?
Tentative date: Thursday June 6 2013 in Hannover Starting at 10:00?
Or 09:00?
