This slideshow contains a few questions which might come up in this form or another during the exam for Certified Passive House Designer (CPHD) or Certified Passive House Consultant (CPHC). See here if you want to learn more about the exam: www.passivhausplaner.eu

1. Harrmann Consulting | May 2016
Exam Preparation for
Certified Passive House Designer (CPHD)
Certified Passive House Consultant (CPHC)
Prepared and presented by:
André Harrmann
Dipl.-Ing. (FH), MHP, CPHD, LEED AP

2. Harrmann Consulting | May 2016
This is not a complete set of exam prep material – only a few selected slides
Disclaimer

3. Harrmann Consulting | May 2016
Calculate Window U-Value
Awindow = wwindow × hwindow = Total window area
= 1.23m × 1.48m = 1.820m2
Aglass = wglass × hglass = Glazing area =
= (1.23-0.117-0.117)m × (1.48-0.117-0.134)m = 0.996×1.229 = 1.224m2
Aframe = Awindow - Aglass = Total window frame area
= 1.820m2 - 1.224m2 = 0.596m2
Lspacer = Lglass = 2 × wglass + 2 × hglass = spacer length
(0.996+1.229)m × 2 = 4.45m
Linstall = Lframe = 2 × wwindow + 2 × hwindow = Window frame =
= (1.23+1.48)m × 2 = 5.42m
hwindow=1.48m
wwindow = 1.23m
hglass=1.229m
wglass = 0.996m
Aglass
Aframe
0.117m
0.134m
0.117m
0.117m

4. Harrmann Consulting | May 2016
Rank these windows for energy performance
1 Window width 1.0 m 2 Window width 1.0 m
Window height 2.0 m Window height 2.0 m
Frame width (side, head) 0.10 m Frame width (side, head) 0.15 m
Frame width (sill) 0.10 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.04 W/mK
A - Window m2 A - Window m2
A - Glass m2 A - Glass m2
A - Frame m2 A - Frame m2
L - Spacer m L - Spacer m
L - Install m L - Install m
U - Window W/m2K U - Window W/m2K
U - Window,installed W/m2K U - Window,installed W/m2K
3 Window width 2.0 m 4 Window width 2.0 m
Window height 3.0 m Window height 3.0 m
Frame width (side, head) 0.15 m Frame width (side, head) 0.15 m
Frame width (sill) 0.15 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.20 W/mK
A - Window m2 A - Window m2
A - Glass m2 A - Glass m2
A - Frame m2 A - Frame m2
L - Spacer m L - Spacer m
L - Install m L - Install m
U - Window W/m2K U - Window W/m2K
U - Window,installed W/m2K U - Window,installed W/m2K

5. Harrmann Consulting | May 2016
Rank these windows for energy performance
1 Window width 1.0 m 2 Window width 1.0 m
Window height 2.0 m Window height 2.0 m
Frame width (side, head) 0.10 m Frame width (side, head) 0.15 m
Frame width (sill) 0.10 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.04 W/mK
A - Window 2.000 m2 A - Window 2.000 m2
A - Glass 1.440 m2 A - Glass 1.190 m2
A - Frame 0.560 m2 A - Frame 0.810 m2
L - Spacer 5.200 m L - Spacer 4.800 m
L - Install 6 m L - Install 6 m
U - Window W/m2K U - Window W/m2K
U - Window,installed W/m2K U - Window,installed W/m2K
3 Window width 2.0 m 4 Window width 2.0 m
Window height 3.0 m Window height 3.0 m
Frame width (side, head) 0.15 m Frame width (side, head) 0.15 m
Frame width (sill) 0.15 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.20 W/mK
A - Window 6.000 m2 A - Window 6.000 m2
A - Glass 4.590 m2 A - Glass 4.590 m2
A - Frame 1.410 m2 A - Frame 1.410 m2
L - Spacer 8.800 m L - Spacer 8.800 m
L - Install 10 m L - Install 10 m
U - Window W/m2K U - Window W/m2K
U - Window,installed W/m2K U - Window,installed W/m2K

6. Harrmann Consulting | May 2016
Rank these windows for energy performance
1 Window width 1.0 m 2 Window width 1.0 m
Window height 2.0 m Window height 2.0 m
Frame width (side, head) 0.10 m Frame width (side, head) 0.15 m
Frame width (sill) 0.10 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.04 W/mK
A - Window 2.000 m2 A - Window 2.000 m2
A - Glass 1.440 m2 A - Glass 1.190 m2
A - Frame 0.560 m2 A - Frame 0.810 m2
L - Spacer 5.200 m L - Spacer 4.800 m
L - Install 6 m L - Install 6 m
U - Window 1.088 W/m2K U - Window 1.197 W/m2K
U - Window,installed 1.208 W/m2K U - Window,installed 1.317 W/m2K
3 Window width 2.0 m 4 Window width 2.0 m
Window height 3.0 m Window height 3.0 m
Frame width (side, head) 0.15 m Frame width (side, head) 0.15 m
Frame width (sill) 0.15 m Frame width (sill) 0.15 m
U-Value Glas 0.6 W/m2K U-Value Glas 0.6 W/m2K
U-Value Frame 1.6 W/m2K U-Value Frame 1.6 W/m2K
PSI - Spacer 0.08 W/mK PSI - Spacer 0.08 W/mK
PSI - Installation 0.04 W/mK PSI - Installation 0.20 W/mK
A - Window 6.000 m2 A - Window 6.000 m2
A - Glass 4.590 m2 A - Glass 4.590 m2
A - Frame 1.410 m2 A - Frame 1.410 m2
L - Spacer 8.800 m L - Spacer 8.800 m
L - Install 10 m L - Install 10 m
U - Window 0.952 W/m2K U - Window 0.952 W/m2K
U - Window,installed 1.019 W/m2K U - Window,installed 1.286 W/m2K
#1
#2
#3
#4

7. Harrmann Consulting | May 2016
Windows and Economics
Passive House certified windows are specified for a single family house (150m2 TFA).
The project has 30m2 window area and the overall Uw,installed is 0.80W/m2K. The site
is in an area with 67kKh/a and the assumed design temperature is -2°C. The
calculated Space Heat Demand is 2,000kWh/a and the Heating Load is 1.15kW as
calculated with PHPP. The client wants so safe money and suggests to install
windows which are $50 cheaper per m2. These alternative windows have the same
glazing option and frame geometry, but different frame material, resulting in overall
Uw,installed = 1.40W/m2K. Life expectancy of both window options is 20 years.
You are requested to evaluate the financial viability of that decision and to
determine if the PH criteria for heating demand and load would still be met.
Assumed fuel cost are 0.10$/kWh. Nominal interest rate is 5% and inflation is 1%.

8. Harrmann Consulting | May 2016
Windows and Economics
• Increased Heating Demand  is total Heating Demand ≤ 10 W/m2
• Increased Heat Load  is total Heat Load ≤ 15 kWh/(m2a)?
• Increased Heating Demand  annual extra cost for heating
• Compare annual extra cost for energy < potential investment savings?
 Net Present Value
What needs to be calculated?
Passive House certified windows are specified for a single family house (150m2 TFA).
The project has 30m2 window area and the overall Uw,installed is 0.80W/m2K. The site
is in an area with 67kKh/a and the assumed design temperature is -2°C. The
calculated Space Heat Demand is 2,000kWh/a and the Heating Load is 1.15kW as
calculated with PHPP. The client wants so safe money and suggests to install
windows which are $50 cheaper per m2. These alternative windows have the same
glazing option and frame geometry, but different frame material, resulting in overall
Uw,installed = 1.40W/m2K. Life expectancy of both window options is 20 years.
You are requested to evaluate the financial viability of that decision and to
determine if the PH criteria for heating demand and load would still be met.
Assumed fuel cost are 0.10$/kWh. Nominal interest rate is 5% and inflation is 1%.

9. Harrmann Consulting | May 2016
Windows and Economics
Passive House certified windows are specified for a single family house (150m2 TFA).
The project has 30m2 window area and the overall Uw,installed is 0.80W/m2K
↑ OPTION #1
windows which are $50 cheaper per m2. These alternative windows have the same
glazing option and frame geometry, but different frame material, resulting in overall
Uw,installed = 1.40W/m2K  OPTION #2

10. Harrmann Consulting | May 2016
Windows and Economics
A × ΔU × ft
× Gt
= QT,Δ
30
m2
(1.40-0.80)
W/(m2K)
1 67
kKh/a
1,206
kWh/a
Heat Demand  Increased Transmission Heat Losses
QT
= A × U × ft
× Gt
Increased demand with cheaper windows
QT,Δ
/ TFA = qT,Δ
1,206
kWh/a
150
m2
8.04
kWh/(m2a)
Total demand
+ q#1
= q#2
2,000/150
kWh/(m2a)
21.37
kWh/(m2a)
> 15 kWh/(m2a)

11. Harrmann Consulting | May 2016
Windows and Economics
A × ΔU × ft
× Δt
= PT,Δ
30
m2
(1.40-0.80)
W/(m2K)
1 (20+2)
K
396
W
Heating Load  Increased Transmission Heat Losses
PT
= A × U × ft
× Δt1 or t2
Increased load with cheaper windows
PT,Δ
/ TFA = pT,Δ
396
W
150
m2
2.64
W/m2
Total load
+ p#1
= p#2
1,150/150
W/m2
10.31
W/m2
= 10 W/m2  criteria met

12. Harrmann Consulting | May 2016
Windows and Economics
Annual Extra cost for heating = Energy Demand × Cost of Fuel
= 8.04kWh/(m2a) × 150m2 × 0.10$/kWh = 1,206kWh/a × 0.10 $/kWh = 120.60$/a
Compare annual extra cost vs. saved capital cost  Net Present Value of extra cost
Saved Capital Cost = 30m2 × 50$/m2 = 1,500$ < 1,644.81$
 extra fuel cost are higher than capital cost savings
 advise client that cheaper windows are not recommended in this case

13. Harrmann Consulting | May 2016
Exam Preparation – practical things
Source: PHI
• Pimp your course binder – use dividers, markers, highlighters
• Organize a “cheat-sheet” – all the formulas gathered in one place
• Copy the symbols and definition pages from PHPP handbook
• Bring the PHPP handbook
• Prepare floor plans, sections and elevations of a generic house
with all the criteria relevant for a Passive House
• Bring color markers, rulers, pens (pencils are not allowed)
• Make sure you know how to work your calculator (yx)
• Bring spares of everything
• Read the PHI’s exam regulations and learning targets
www.passivhausplaner.eu

14. Harrmann Consulting | May 2016
Exam Preparation – practical things
Source: PHI
• Organize a “cheat-sheet” – all the formulas gathered in one place
 prepare your own from scratch or see what others have done:
www.15kwh10w.com/passive-house-tools

15. Harrmann Consulting | May 2016
Good Luck!
André Harrmann
www.15kwh10w.com