A walk-through presentation about the challenges during the design and construction of this Passivhaus Certified project in Hertfordshire, UK.

1. The Deerings
Completed May 2017
Gresford Architects Ltd
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

2. Reception of Project
NTA Architects Ltd.
Ground Floor Plan First Floor Plan
NTA Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

3. Reception of Project
Longitudinal Section
NTA Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

4. Reception of Project
NTA Architects Ltd.
Perspective South Elevation North Elevation
NTA Architects Ltd. NTA Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

5. Concept Design
Location
Climate Data & Altitude
Googlemaps Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

6. Concept Design
Orientation
Solar Gains & Shading
Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

7. Concept Design
Form Factor
HLFF = HLA / TFA
Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

8. Technical Design - Coordination
General Arrangement Drawings
Ground Floor Plan First Floor Plan
Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

9. Technical Design - Coordination
General Arrangement Drawings
Section CC
Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

10. Technical Design - Coordination
General Arrangement Drawings
Section DD
Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

11. Technical Design - Coordination
Improving Opaque Element’s U-value
Slab-Wall Detail
Slab U-value: 0.092 W/(m2.K)
Wall-Roof Detail
Wall U-value: 0.106 W/(m2.K)
Flat Roof – Rooflight Detail
Roof U-value: 0.096 W/(m2.K)
Gresford Architects Ltd. Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

12. Technical Design - Coordination
Fenestration Design and Window Specification
Previous Scheme – South Elevation Proposed Scheme – South Elevation
NTA Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

13. Technical Design - Coordination
Ventilation Strategy
® Williams Energy
First Floor Reflective Ceiling Plan 3D Layout
® Williams Energy
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

14. Passivhaus Design Stage Approval
Certification Process
MEAD: Energy & Architectural Design Ltd
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

15. On-Site Construction
Building Process Documented
Slab Foundation
Slab U-value: 0.092 W/(m2.K)
Gresford Architects Ltd. Gresford Architects Ltd. Gresford Architects Ltd.
Day 1 Day 5 Day 7
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

16. On-Site Construction
Building Process Documented
External Wall
Wall U-value: 0.085 W/(m2.K)
Gresford Architects Ltd. Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

17. On-Site Construction
Building Process Documented
Roof
Roof U-value: 0.070 W/(m2.K)
Gresford Architects Ltd. Gresford Architects Ltd.Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

18. On-Site Construction
Building Process Documented
Windows & External Blinds
Window U-value: 1.00 W/(m2.K)
Gresford Architects Ltd. Gresford Architects Ltd. Gresford Architects Ltd.Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

19. On-Site Construction
Building Process Documented
Airtightness
Pressurization test result n50: 0.59 ACH
Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

20. On-Site Construction
Building Process Documented
MVHR & Ventilation System
Commissioned
Gresford Architects Ltd. Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

21. On-Site Construction
Building Process Documented
Heating System
Commissioned
Gresford Architects Ltd. Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

22. Achieving Passivhaus Certification
Documentation Required
- PHPP signed*
- Construction drawings
- Technical specs
- Blower door test certificate
- MVHR commissioning
- Photographic evidences of
construction
- Declaration of Construction
Manager
Gresford Architects Ltd.
Certificate
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

23. Questions & Answers
Twitter: M McCrae & M Grant @ paperigloovoice Gresford Architects Ltd
The Deerings
Completed May 2017
Gresford Architects Ltd.
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

24. So why Passivhaus is the gold standard of energy efficient design?
Closing the Performance Gap: Predicted vs. Measure
Passivhaus Certification on Residential Projects Francisco Cerezuela MSc MCIAT CPHD

25. Passivhaus: It’s a wrap!
Francisco Cerezuela MSc MCIAT CPHD
Comfort, Energy Efficiency and Quality Assurance