3. Your Independent Experts in Home Energy
Technologies
We… 1. Develop Custom Solutions
2. Supply Products
3. and Install
4. The Challenge
There are too many Issues and Choices
Climate
Regulation
Change and
Changes
Peak Oil
Certification
and Quality
Control Cost of
Energy and
heat batts?
batts? passive Building
pumps? design?
thermal
curtains? heat recovery
ventilation?
solar
water?
Myriads of gas? Return on
Products under floor Investment
and Systems heating?
to Choose
double
from
glazing?
air
conditioning?
wood
burner?
Page 4
6. Flexibility and Quality Products
• Skystream • Rinnai • Mitsubishi
• WhisperGen • Methven • Panasonic
• Cromptons-Sylvania • Tasman Insulation • Fujitsu
• Eurovision • Latitude • Daikin
• ASL (Fairview & Elite) • Terra Lana • Nobo
• Autex • Skypower
• Poly Gold • Warmfloor
• EXPOL • Wagner/Power Tech
• Eco-Block • Rheem
• De Longi
• Fuji Air
• Clean-Air/Avon-aire
• Lossnay
• … and more
Page 6
7. The Difference is in our
Approach and Process
Planning and Construction Stages
1 Sketches/Ideas
2 Develop Concept Plans
3 Finalise Plans
4 Create Specifications
5 Submit for Building Consent
6 Implement Alterations
7 Site Project Management
8 Sign-off and Hand-over
Right House supplies
and installs products
working with the builder
First meeting Customer
between Customer Building
Building
Right House agrees on
client, Your Home
Your Home
agrees on analyses and solution Guide
Guide
designer and solution recommends Specification
Specification
Right House estimate solutions & Quote
& Quote
Planning
Planning Solution
Acceptance
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Your Home Solution Custom
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Estimate Solution Customer handover and
Guide
Guide Solution
Report customer care
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Living in
Your Home
Your Home
Commissioning
Commissioning Guide
Guide
Certificate
Certificate
Page 7
9. The new NZS4218:2009
•NZS4218:2004 remains the Acceptable Solution
until NZBC Clause H1 cites the 2009 version
•The 2009 version can be used as Alternative
Solution, but the BCA is not required to accept it
Page 9
10. These rules can be used to show compliance for …
► All Housing &
► All buildings smaller than 300m2
(H1/AS1-2.1.1)
Page 10
11. New Zealand
Climate Zones
Reproduced from “NZS 4218: 2004 Energy
efficiency - Small building envelope”
with permission from Standards New Zealand.
AS/NZS 4218: 2004 can be purchased from
Standards NZ at www.standards.co.nz
Page 11
12. 4 Compliance Paths
H1
Acceptable Solutions Verification Methods
AS1 VM1
NZS4218 NZS4218 NZS4218 ALF
Schedule Calculation Modelling BPI
Rp Rr Ep Er
Page 12
13. 4 Compliance Paths
H1
Acceptable Solutions Verification Methods
AS1 VM1
IF:
Glazing < 30% IF:
Any design Any housing
ESW Windows < 30% Glazing < 50%
Skylights < 1.2m2
NZS4218
NZS4218 NZS4218
NZS4218 NZS4218
NZS4218 BPI
BPI
Schedule
Schedule Calculation
Calculation Modelling
Modelling
Rp Rr Ep Er
Page 13
14. 4 Compliance Paths
H1
Acceptable Solutions Verification Methods
AS1 VM1
IF:
IF:
Glazing < 30%
Glazing < 30%
ESW Windows < 30% IF:
IF:
Any design Any housing
Skylights < 1.5m²30%
ESW Windows < or 1.5%
2
Glazing < 50%
Glazing < 40%
decor. glaz<& louvres < 3m²
Skylights 1.2m
NZS4218
NZS4218 NZS4218
NZS4218 NZS4218
NZS4218 BPI
BPI
Schedule
Schedule Calculation
Calculation Modelling
Modelling
Rp Rr Ep Er
Page 14
15. 1. NZS4218 Schedule Method – Z2
• To comply:
o R-values of ALL components must meet Schedule minimums (NZS4218-3.1.1)
• Notes
o All R-values are “construction” R-values (H1/AS1-2.3)
o Window R-values include frames (H1/AS1-Tbl1(5))
o No R-value requirements for opaque doors (H1/AS1-Tbl1(6))
o Roof R-value must take into account non-CA downlights (BRANZ HIG p 25)
o All slab floors and suspended floors with continuous perimeter and foil meet R-1.3 target
(H1/AS1-Tbl1(4))
o Traditional leadlight glass has R-0.26 if area is no greater than 2.6m2 (H1/AS1-Tbl1(8))
o Heated roof, walls and floors must meet R-values from Table 3 (NZS4218-3.1.5)
Page 17
16. 1. NZS4218 Schedule Method – Z2
• To comply:
o R-values of ALL components must meet Schedule minimums (NZS4218-3.1.1)
• Notes
o All R-values are “construction” R-values (H1/AS1-2.3)
o All slab floors and suspended floors with continuous perimeter and foil meet R-
1.3 target (H1/AS1-Tbl1(4))
o Roof R-value must take into account non-CA downlights (NZS4246)
Page 18
17. Construction R-values
R-
• NZS4214
• BRANZ House Insulation Guide
• Design Navigator (www.design-navigator.co.nz)
Page 21
18. 1. NZS4218 Schedule Method
IF:
Glazing ≥ 30% (NZS4218-Tbl 1 (Header))
…or
ESW Windows ≥ 30% (NZS4218-Tbl 1(3))
...or
Skylights ≥ 1.2m2 (NZS4218-Tbl 1(7))
…or
IF the building fails to meet the
Schedule Method R-value targets
⇓
CALCULATION METHOD
Page 22
19. 2. NZS4218 Calculation Method Rp Rr
The Heat Loss of the proposed building is not greater than
the heat loss of the reference building. (NZS4218-3.2.2)
AFloor AWalls ARoof AGlazing
HeatLoss = + + + ...
RFloor RWalls RRoof RGlazing
AF ( prop ) AW ( prop ) AR ( prop ) AG ( prop ) AF ( ref ) AW ( ref ) AR ( ref ) AG ( ref )
HL prop = ... HLref = ...
1. RF ( prop )
+
RW ( prop )
+
RR ( prop )
+
RG ( prop ) ≤ RF ( ref )
+
RW ( ref )
+
RR ( ref )
+
RG ( ref )
2. … and any individual R-value at least 60% of the Schedule value!
Note: Clear double glazing can be replaced with clear single (NZS4218-3.2.6)
Page 23
20. 2. NZS4218 Calculation Method Rp Rr
The Heat Loss of the proposed building is not greater than
the heat loss of the reference building. (NZS4218-3.2.2)
AFloor AWalls ARoof AGlazing
HeatLoss = + + + ...
RFloor RWalls RRoof RGlazing
AF ( prop ) AW ( prop ) AR ( prop ) AG ( prop ) AF ( ref ) AW ( ref ) AR ( ref ) AG ( ref )
HL prop = ... HLref = ...
1. RF ( prop )
+
RW ( prop )
+
RR ( prop )
+
RG ( prop ) ≤ RF ( ref )
+
RW ( ref )
+
RR ( ref )
+
RG ( ref )
2. … and any individual R-value at least 60% of the Schedule value!
50%
Note: Clear double glazing can be replaced with clear single (NZS4218-3.2.6)
Page 24
21. 2. NZS4218 Calculation Method (Z2) - Glazing ≤30% Rp Rr
• Proposed building: actual areas and R-values (NZS4218-3.2.4)
• Reference building: 30% glazing and 70% wall (H1/AS1-1.1.3)
Example
o Floor: 150 m2
o Total wall: 200 m2 (Net wall: 144 m2)
o Windows: 56 m2 (28%)
o Roof: 150 m2
o Skylight: 0 m2
Replacement Table 1 Proposed Reference Mimimum
Areaprop Rproposed Arearef Rreference 60% Rule
(Zone 1)
Roof 150 m2 Rprop 150 m2 R-2.9 R-1.7
Wall 144 m2 Rprop 140 m2 R-1.9 R-1.1
Floor 150 m2 Rprop 150 m2 R-1.3 R-0.8
Glazing 56 m2 Rprop 60 m2 R-0.26 R-0.15
Skylights R-0.26 R-0.15
Page 26
22. 2. NZS4218 Calculation Method (Z2) - Glazing >30% Rp Rr
• Proposed building: actual areas and R-values (NZS4218-3.2.4)
• Reference building: actual areas but different R-values for the first 30% of glazing and the rest
(H1/AS1-1.1.3)
• Example:
o Floor: 150 m2
o Total wall: 200 m2 (Net wall: 132 m2)
o Windows: 68 m2 (34%)
o Roof: 150 m2
o Skylight: 0 m2
Replacement Table 1 Proposed Reference Mimimum
Areaprop Rprop Arearef Rreference 60% Rule
(Zone 2)
Roof 150 m2 Rprop 150 m2 R-2.9 R-1.7
Wall 132 m2 Rprop 132 m2 R-1.9 R-1.1
Rprop 150 m2 R-1.3 R-0.8 Replacement
Floor 150 m2 Table 4
Glazing first 30% 68 m2 Rprop 60 m2 R-0.26 R-0.15
> 30% 8 m2 R-0.31 R-0.19
Skylights R-0.31 R-0.19
Page 29
23. 2. NZS4218:2009 Calculation Method (Z2) - Glazing ≤30% Rp Rr
• Proposed building: actual areas and R-values (NZS4218-3.2.4)
• Reference building: 30% glazing and 70% wall (H1/AS1-1.1.3)
Example
o Floor: 150 m2
o Total wall: 200 m2 (Net wall: 144 m2)
o Windows: 56 m2 (28%)
o Roof: 150 m2
o Skylight: 0 m2
Replacement Table 1 Proposed Reference Mimimum
Areaprop Rproposed Arearef Rreference 50% Rule
60%
(Zone 2)
Roof 150 m2 Rprop 150 m2 R-2.9 R-1.7
Wall 144 m2 Rprop 140 m2 R-1.9 R-1.1
Floor 150 m2 Rprop 150 m2 R-1.3 R-0.8
Glazing 56 m2 Rprop 60 m2 R-0.26 R-0.15
Skylights R-2.9
R-0.26 R-0.15
Page 32
24. 2. NZS4218:2009 Calculation Method (Z2) - Glazing >30% Rp Rr
• Proposed building: actual areas and R-values (NZS4218-3.2.4)
• Reference building: actual areas but different R-values for the first 30% of glazing and the rest
(H1/AS1-1.1.3)
• Example:
o Floor: 150 m2
o Total wall: 200 m2 (Net wall: 132 m2)
o Windows: 68 m2 (34%)
o Roof: 150 m2
o Skylight: 0 m2
Replacement Table 1 Proposed Reference Mimimum
Areaprop Rprop Arearef Rreference 50% Rule
60%
(Zone 2)
Roof 150 m2 Rprop 150 m2 R-2.9 R-1.7
Wall 132 m2 Rprop 132 m2 R-1.9 R-1.1
Rprop 150 m2 R-1.3 R-0.8 Replacement
Floor 150 m2 Table 4
Glazing first 30% 68 m2 Rprop 60 m2 R-0.26 R-0.15
> 30% 8 m2 RR-0.31
-0.4 R-0.19
Skylights RR-0.31
-2.9 R-0.19
Page 35
25. 2. NZS4218 Calculation Method Rp Rr
IF:
Glazing ≥ 50% (H1/AS1-Tbl 4(3))
…or
IF the building fails the
Calculation Method heat loss targets
⇓
MODELLING METHOD or
BUILDING PERFORMANCE INDEX (BPI)
Page 37
26. 3. NZS4218 Modelling Method Ep Er
Heating Energy Thermal Simulations:
• Insulation, Solar gains, Thermal mass, Internal gains, Infiltration,
Heating schedules, etc.
Heating Energyproposed
proposed ≤ Heating Energyreference
reference
Page 38
27. 4. Building Performance Index
The Building Performance Index (BPI)
does not exceed 1.55 (H1.3.2E)
Applies only to housing (H1.3.2E)
Page 39
28. Solid Walls (Z2)
• Conditions:
o Insulation is placed on the exterior (H1/AS1-Tbl2(12) & H1/AS1-Tbl3(11))
o For “multiple” wall constructions use corresponding wall R-value targets and
“worst case” R-value targets for other components
o For solid timber walls 85% of internal walls must be solid timber (H1/AS1-Tbl2(11))
Concessional R-values
Schedule or
Calculation or
Modelling
Method
Only Schedule
Method
(H1/AS1-Tbl2&3(9))
Page 42
29. High Thermal Mass (Z2) - NZS4218:2009
Solid Walls (Z2)
“High Thermal Mass”: 215kg/m²
Page 43
30. Mixed Walls (Z1)
Solid Constructions (all zones) -
NZS4218:2009
Schedule Method:
• Roof: R-3.5, Floor: R-1.5
• Walls and Windows according to corresponding tables
Calculation Method:
• Calculate heat loss for a light weight reference building: HLLW
• Calculate heat loss for a high thermal mass reference building: HLHTM
• Calculate proportions of light and high thermal mass walls: pLW & pHTM
• Reference Building Heat Loss:
HLref = pLW x HLLW + pHTM x HLHTM
Page 46
31. Heated Elements
1. Heated elements must meet the R-values in the Table 3 (NZS4218-3.1.5)
2. Rin/Rout < 0.1 (H1/AS1-Tbl3)
Note: Carpets and other floor covering are not included (H1/AS1-Tbl3)
Page 47
32. E3 Requirements
R-values for walls, roofs and ceilings shall be no less than:
a) For light timber frame wall or other framed wall constructions
with cavities, 1.5.
b) For single skin normal weight masonry based wall construction
without a cavity, 0.6.
c) For solid timber wall systems no less than 60 mm thick, 0.6.
d) For roof or ceilings of any construction, 1.5.
(H1/AS1-2.1.4 (Comment 2) & E3/AS1-1.1.1)
Page 48
33. FAQs
•All areas are measured on the inside
•Solid sandwich constructions are OK for solid wall
concession (H1/AS1-Tbl 2a(12))
•Opaque doors are ignored in the Schedule Method.
In the Calculation Method up to 3m2 are ignored,
greater than 3m2 are treated as walls (Garages!)
(H1/AS1-Tbl 1(6) & H1/AS1-Tbl 4(4))
•Attached dwellings can be assessed as one dwelling
with no heat loss through joint walls. If assessed
individually joint walls must meet R-value targets.
(H1/AS1- 2.1.2)
Page 49
34. Replacements, Alterations & Additions
Codewords Article 32 (Oct 2008)
• Repairs and Replacements:
o “like for like”
o Timber framed SG windows may need replacements with IGU or tradeoffs!
o Rule of thumb: 2% of total area of thermal envelope and performance no less
than 20% worse than original
o Allowance for air tightness!
• Alterations and Additions:
o Only consider the new building part
o 30% rules for compliance method applied to addition only
o Existing building upgrade only required if it “performs less energy efficiently
because of the addition or extension”=> upgrade to previous level
o Schedule and Calculation Methods “as if addition is an entire building”
o Modelling Method: include complete building, but keep R-values of existing part
of the building
Page 50
35. NZS4218:2009 Appendix D &Alterations
Replacements, Alterations - Additions
Does not apply to buildings built 2007 or later
•Conditions and Methods apply to alteration only (D1)
or …
•to the whole building using the following guides (D2&3)
o Schedule Method:
– Limits: (D2.1)
Total building: 30% limit (no ESW limit!)
Total building: 1.5m² or 1.5% skylight
Extension only: 3m² decorative glazing
– Only alteration needs to meet targets (D2.2)
o Calculation Method:
– Limits: Total building: 40% limit (D3.1)
– Only alteration needs to meet targets (D3.2)
– Proposed building has reference building R-values in the existing parts (D3.3)
Page 51
36. NZS4218:2009 Appendix D &Examples
Replacements, Alterations - Additions
Example Solution
Insert window in wall (total glazing <30%) Window must have R-0.26
Add extension with more than 30% D1.2: Too much glazing in
glazing alteration for Schedule
Total new building < 30% glazing But:
D2: Schedule permitted for total
building, but only alteration needs
to meet Schedule Method
As before but use single glazing Fails Schedule Method, but can
use Calculation Method either on
extension or whole building
Page 52
37. NZS4218:2009 Appendix D &Examples
Replacements, Alterations - Additions
Example Solution
Add extension with more than 42% D1.2: Too much glazing in extension for Schedule or
glazing, Calculation Method
Total new building 35% glazing, But
Existing windows single glazed (R- D3: Calculation Method permitted for whole building
0.15) and walls are uninsulated Use reference building R-values for existing elements in
Existing floor has R-2.2 proposed building heatloss and use R-2.2 for floor
Areasproposed Rproposed Areasreference Rreference (Zone 1)
Existing Roof as existing R-2.9 as existing R-2.9
New Roof as proposed Rprop as proposed R-2.9
Existing Wall as existing R-1.9 70% R-1.9
New Wall as proposed Rprop
Existing Floor as existing R-2.2 as existing R-1.3
New Floor as proposed Rprop as proposed R-1.3
Existing Windows as existing R-0.26 30% R-0.26
New Windows as proposed Rprop
Page 53
38. Step-by-
Step-by-step
1. Check whether Schedule Method is permitted:
a. if Skylights ≥ 1.2m Calculation Method
b. if Glazing ≥ 30% Calculation Method
c. if ESW Windows ≥ 30% Calculation Method
2. Choose correct Schedule Table:
a. Climate Zone & Construction Type
3. if all proposed R-values ≥ Schedule Table check 9.
…otherwise
4. Check whether Calculation Method is permitted:
a. if Glazing ≥ 50% Modelling Method or BPI (ALF)
5. Calculate correct reference building areas (70/30% rules)
6. Calculate Heat Losses for proposed and reference building
7. Check Calculation Method Compliance:
a. if Proposed HL ≥ reference HL Modelling Method or BPI (ALF)
b. if any R-values < 60% of reference R-values Modelling Method or BPI (ALF)
…otherwise check 9.
8. Use Modelling Method or BPI (ALF)
9. ALWAYS check:
a. Heated component requirements
b. E3 requirements
Page 54
45. Create a Point of Difference
cost-
Right House is the easiest and most cost-effective way to
create a well researched energy and comfort solution.
Treat your project’s future energy
running costs and your client's living
comfort with the same importance
as its structural performance.
Right House web page featuring our design partners
Page 61
