Updated and enhanced version of an oldie, with added info on responsibility of manufacturers and then that of the designer. High performance windows now a local reality.

1. Bronwyn Barry, Assoc.AIA
Certified Passive House Designer
Director, One Sky Homes
COPYRIGHT ONE SKY HOMES 2013

2. • All about the Edge
• Overthinking it: losing your Balance
• Your responsibility: Size and Location
• Don’t forget the basics: water management
• A FREE install example for paying attention
Passive House Recipe
" Buildings heated with hair dryers"
Overview:

3. Sum of the Whole is GREATER than sum of the Parts?
• Glass > spacer
• Spacer > Sash
• Sash > Frame
• Frame > Wall

4. Source: ARCHnews Green Column, June 2009. Dan Johnson, danjoh99@gmail.com
• Can it Drip?
• Will it Drain?
• Can you set it
back into the wall?

5. Image Source: Breweryreviewery.com. Scanned graphic from: Residential Windows by John Carmody et al
(Adjust according to your own taste preference.)

6. Source: B.Barry – One Sky Homes. Moore Residence Retrofit PHPP outputs, 2012
• Exterior shading is
better than lower
SHGC
• Changing SHGC
per orientation is
overrated!
(Only try this in Heating Dominated climates)

7. Image source: Hella.info, Balance Project (www.needsbased.com) and author’s own photo of project Berkeley, CA (right)

8. * Varies with climate, site and season
* Goal: optimize passive energy flows across seasons
GAINS LOSSES
Solar Heat Gains (Qs)
+
Internal Heat Gains (QI)
+
Annual Heat Demand
(QH)
=
Transmission Heat Losses
(QT)
+
Ventilation Heat Losses
(QV)
+
Useful Cooling Demand
(QK)
70 °F
( QS + QI ) – ( QT + QV ) = QH*
COPYRIGHT ONE SKY HOMES 2013

9. •Location
•Shape
•Orientation
•Glazing
•SHGC
•Shading
•Occupants
•Lighting
•Electronics
•Appliances
•Mechanicals
•HW storage
•Insulation
•Thermal Bridging
•Windows/Doors
•Glass U-value
•Frames
•Install
•Air Sealing
•HRV
GAINS LOSSES
( QS + QI ) – ( QT + QV ) = QH
COPYRIGHT ONE SKY HOMES 2013

10. BEFORE AFTER COPYRIGHT ONE SKY HOMES 2013

11. Window
Area
Orientation
SHGC
Reduction
Factor for
Solar
Radiation
Window
Area
Window
U-Value
Window
R-Value
Glazing
Area
Glazing
Area as
% of
Gross
Floor
Area
Averag
e
Global
Radiati
on
Transmission
Losses
Heat Gains
Solar Radiation
maximum: ft2 BTU/hr.ft2.F hr.ft2.F/BTU
ft2
kBTU/ft
²yr
kBTU/yr kBTU/yr
North 0.49 0.51 19.6 0.27 3.7 15.2 0.9% 48 314 238
East 0.37 0.51 59.5 0.23 4.4 45.1 2.7% 142 806 1601
South 0.55 0.11 105.5 0.23 4.3 86.3 5.2% 144 1462 938
West 0.48 0.27 155.7 0.22 4.5 127.1 7.7% 49 2053 997
Horizontal 0.00 0.00 0.0 0.00 0.0 0.0 0.0% 150 0 0
0.49 0.28 340.2 0.23 4.4 273.8 4635 3773
• Did you Look at your Pluses and Minuses?
• Retrofits are challenging… but still Passive House Possible

12. Source: IR Images: Lorna Fear IR images
Find your biggest
LOSERS and
ELIMINATE
THEM!

13. Why certification matters:
• Health
• Comfort
• Durability
Info from PHI component Certification Criteria document: http://www.passiv.de/downloads/03_certification_criteria_transparent_components_en.pdf
PHI Certification requires:
Uw, installed and fRsi,
(which check for interior cold spots and
interior surface condensation.)
This ensures a high level of occupant
comfort due to the elimination drafts
and mold growth.

14. Image 1: SmartWin(Propassivhausfenster.net) 2.Enersign.de, Image 3: passivehausfenster.at , Image 4: walchfenster.at
Good Frame Design Includes:
• Strength
• Durability
• Insulation,
• Drainage
• and various options for installation.

15. Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008
(Less frame, more glazing can lower your Heating Demand)

16. Big moves in thin glass
Source: SuperWindows.eu & http://www.passiv.de/komponentendatenbank/files/pdf/zertifikate/zd_pazen_enersign-plus-arctis_en.pdf
Invis 160 = Ug 0.15 W/m2K ENERsign Arctis = Uw 0.57 W/m2K

17. A
B
C
D
Window
Width Ht Total
U-
installed
Cost/sf
(") (") SF BTU/hr.ft2
.F $
A-1 26 3/8 46 5/8
24.1
0.14
$143.12A-2 29 5/8 46 5/8 0.14
A-3 56 15 3/8 0.15
B-1 26 3/8 62
24.1
0.14
$121.23
B-2 29 5/8 62 0.14
C 49 3/5 70 24.1 0.13 $83.56
D 45 5/7 76 24.1 0.13 $83.31
Better Design Choices:
• Large openings
• Taller or vertical
• Fixed windows
• Casement only for operable
• No muntins
• No mullions

18. Design and Image Source: zanderroth architekten, with thanks to bruteforcecollaborative.com for all vent panel image sourcing

19. Images: Left and bottom right: Wicona thermally broken ventilation flap for Wicline, Top right unknown. Source BFC

20. Source: Protokollbund Nr. 37, Passive House Institute, Darmstadt, Nov. 2008
POOR: Uw(installed) = 0.85 W/m2K/m2K
Psi-install = 0.033 W/m2K
BETTER: Uw(installed) = 0.83 W/m2K0 W/m2
Psi-install = 0.028 W/m2K
BEST: Uw(installed) = 0.83 W/m2KW/m2
Psi-install = 0.027 W/m2K
EXTERIOR
INSET
CENTERED

21. SILL & JAMB (CASEMENT)
Air-sealing RO to
plywood sheathing
Window buck with
dropped sill
Prosoco liquid
flashing over RO and
exterior insulation
Alu drip edge added
to base of window
Exterior sills and
jamb trim added
COPYRIGHT ONE SKY HOMES 2013

22. WINDOW BUILDUP AT SILL WINDOW INSTALL SEQUENCE COPYRIGHT ONE SKY HOMES 2013

23. Good luck
(And Thank You)
Vision
(Northwin)
PHI Certification Documents: www.passivehouse.com
CaliPassiv
(Wooden Window Inc.)
Synergist
(Casagrande)
Bronwyn Barry, Assoc. AIA, CPHC
Director, One Sky Homes
PHCA Co-President
2012