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Dienstag, 30. März 2010   1
Optimizing your PRIUS




Dienstag, 30. März 2010      2
Optimizing your Windows




Dienstag, 30. März 2010        3
Optimizing your Windows
       • Maximizing the amount of glass
       • Location, location, location
       • Insulating ...
Darwin’s theory




Dienstag, 30. März 2010   5
Darwin’s theory of windows




       Source: ARCHnews Green Column, June 2009. Dan Johnson, danjoh99@gmail.com




Dienst...
Reducing the Heat Demand
      Less frame, more glazing lowers your Heating Demand:




       Source: Protokollbund Nr. 3...
Location, location, location…
      POOR:             Uw(installed) = 1.05 W/m2K
                        Psi-install = 0.0...
What does this do to my PHPP?
                          Treated Floor Area                            1448.5     ft2
     ...
Avoid interior cold spots!




       Images: Stefan Carpentier, Q+ Performance Testing, CA




Dienstag, 30. März 2010   ...
Over-insulating
      Simply adding insulation over your frame improves performance!


    BEFORE: Uw(installed) = 1.19 W/...
Options for out-swing windows
       Example of Danish project over-insulating out-swing windows:




       Source: Confe...
Over-insulating
      Sometimes too much of a good thing is not necessary!




  30% COVERED:                             ...
Over-insulating
            Optimizing psi-install with insulation
    Psi (W/mK)




                                DIST...
Not all over-insulating is good
     Insulating over Alum-clad frames does not work as well…




       Source: Protokollb...
Options for clad windows
      Alum-clad on the sash only performs much better!




       Source: Protokollbund Nr. 37, P...
What, no more nailing fin?
      Weaning ourselves off the old installation detail…




        BEFORE

       Source: BSC...
Flash often, but flash carefully!
      Please - NO thermal bridge pan flashing!




                                     ...
Sill install suggestions…
       Sill pan behind
                             Post Presentation Note:
       nailing fin a...
The Euro version…

       Sill pan & flashing
       behind drip edge
       of window
       cladding

       Bituthane
 ...
And a header install suggestion

                          Over-insulation

                          Nailing clips
      ...
Sills for Euro windows…




Dienstag, 30. März 2010        22
Now to the thresholds…




Dienstag, 30. März 2010       23
Step-over thresholds




Dienstag, 30. März 2010     24
Some investigation is needed!



                          STEP-OVERTHRESHOLD:                                LOW THRESHOL...
Conclusions

       • Slimmer frames can perform better, despite lower U-values
       • Moving the window into the wall c...
Thank you!




                          Presentation & Data:

                          Bronwyn Barry



                ...
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Sills & Thresholds: Passive House Installation Details that boost performance. Slide 1 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 2 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 3 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 4 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 5 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 6 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 7 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 8 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 9 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 10 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 11 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 12 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 13 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 14 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 15 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 16 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 17 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 18 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 19 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 20 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 21 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 22 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 23 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 24 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 25 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 26 Sills & Thresholds: Passive House Installation Details that boost performance. Slide 27
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Sills & Thresholds: Passive House Installation Details that boost performance.

  1. 1. Dienstag, 30. März 2010 1
  2. 2. Optimizing your PRIUS Dienstag, 30. März 2010 2
  3. 3. Optimizing your Windows Dienstag, 30. März 2010 3
  4. 4. Optimizing your Windows • Maximizing the amount of glass • Location, location, location • Insulating the window frame • Flashing – how to do it discretely! • A cautionary tale about thresholds • Conclusions Dienstag, 30. März 2010 4
  5. 5. Darwin’s theory Dienstag, 30. März 2010 5
  6. 6. Darwin’s theory of windows Source: ARCHnews Green Column, June 2009. Dan Johnson, danjoh99@gmail.com Dienstag, 30. März 2010 6
  7. 7. Reducing the Heat Demand Less frame, more glazing lowers your Heating Demand: Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 7
  8. 8. Location, location, location… POOR: Uw(installed) = 1.05 W/m2K Psi-install = 0.039 W/m2K Placing the window in the best location within the wall cavity : Horizontal direction BEST: Uw(installed) = 0.99 W/m2K Psi-install = 0.02 W/m2K BETTER: Uw(installed) = 1.00 W/m2K Psi-install = 0.023 W/m2K Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 8
  9. 9. What does this do to my PHPP? Treated Floor Area 1448.5 ft2 My project: Gross Heated Building Footprint Area 796 ft2 Gross Enclosed Volume 12312.2 ft3 5 Win λ ΨInstall SSHD AHD Loc'n (%) (W/mK) (BTU/hr.ft.°F) kBTU/(ft²yr) kBTU/(ft²yr) 0 0.016 0.009 4.29 4.8 30 0.011 0.006 4.24 3.73 50 0.008 0.005 4.21 3.71 By moving the windows to the center of the wall we reduced the Annual Heat Demand by 22%. Dienstag, 30. März 2010 9
  10. 10. Avoid interior cold spots! Images: Stefan Carpentier, Q+ Performance Testing, CA Dienstag, 30. März 2010 10
  11. 11. Over-insulating Simply adding insulation over your frame improves performance! BEFORE: Uw(installed) = 1.19 W/m2K AFTER: Uw(installed) = 0.78 W/m2K Psi-install = 0.15 W/m2K Psi-install = 0.005 W/m2K Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 11
  12. 12. Options for out-swing windows Example of Danish project over-insulating out-swing windows: Source: Conference Proceedings, 12th International Conference on Passive Houses 2008, PHI. ‘The Architectural and Technical Consequences of Different Window Details in a Danish Passive House’ by Camilla Brunsgaard, Per Heiselberg and Rasmus L. Jensen, Aalborg University Department of Civil Engineering Dienstag, 30. März 2010 12
  13. 13. Over-insulating Sometimes too much of a good thing is not necessary! 30% COVERED: 50% COVERED: 100% COVERED: Uw(installed) = 0.96 W/m2K Uw(installed) = 0.94 W/m2K Uw(installed) = 0.89 W/m2K Psi-install = Psi-install = Psi-install = 0.008 W/m2K 0.003 W/m2K 0.-013 W/m2K Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 13
  14. 14. Over-insulating Optimizing psi-install with insulation Psi (W/mK) DISTANCE (Ueb): Exterior glazing to Exterior insulation (m) Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 14
  15. 15. Not all over-insulating is good Insulating over Alum-clad frames does not work as well… Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 15
  16. 16. Options for clad windows Alum-clad on the sash only performs much better! Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008 Dienstag, 30. März 2010 16
  17. 17. What, no more nailing fin? Weaning ourselves off the old installation detail… BEFORE Source: BSC Info Sheet 302, Pan Flashing for Exterior Wall Coverings Dienstag, 30. März 2010 17
  18. 18. Flash often, but flash carefully! Please - NO thermal bridge pan flashing! Sill pan under window to interior Dienstag, 30. März 2010 18
  19. 19. Sill install suggestions… Sill pan behind Post Presentation Note: nailing fin and in One audience member front of window pointed out that the exterior wood sill had no way of being Bituthane attached without membrane penetrating the sill flashing. Two flashing potential options: 1. Leave it off and use Air-tight taping to German-style exposed metal sills the interior as flashing and finish 2. Use an A35-type clip to attach the wood sill to the jamb extensions and have it ‘float’ above the metal sill pan. AFTER: Dienstag, 30. März 2010 19
  20. 20. The Euro version… Sill pan & flashing behind drip edge of window cladding Bituthane membrane flashing Air-tight taping to the interior AFTER: Dienstag, 30. März 2010 20
  21. 21. And a header install suggestion Over-insulation Nailing clips (Simpson LTP5’s) Air-tight taping at interior Window centered in wall Euro Header: Dienstag, 30. März 2010 21
  22. 22. Sills for Euro windows… Dienstag, 30. März 2010 22
  23. 23. Now to the thresholds… Dienstag, 30. März 2010 23
  24. 24. Step-over thresholds Dienstag, 30. März 2010 24
  25. 25. Some investigation is needed! STEP-OVERTHRESHOLD: LOW THRESHOLD: U (hdr + jmb) = 1.13 W/m2K U (hdr + jmb) = 1.13 W/m2K U (sill) = 1.27 W/m2K U (sill) = 3.329 W/m2K U (frame) = 1.15 W/m2K U (frame) = 1.47 W/m2K Overall Performance Delta: 0.32 W/M2k (per door) Dienstag, 30. März 2010 25
  26. 26. Conclusions • Slimmer frames can perform better, despite lower U-values • Moving the window into the wall center reduces Heat Demand • Insulating over the frame improves the window performance • Metal pan flashing details are tricky – proceed with caution! • Look out for your door u-values: many low thresholds do not perform well! Account for this in your PHPP calculations. Dienstag, 30. März 2010 26
  27. 27. Thank you! Presentation & Data: Bronwyn Barry Review & assistance: Stefan Carpentier Dienstag, 30. März 2010 27
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Passive House Window & Door Installations: Improving your performance by improving your details.

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