ENERGY EFFICIENCY Flashcards
Building Envelope
Parts of a building’s fabric that separate conditioned spaces from non-conditioned spaces.
% of Energy related greenhouse gas emissions from buildings
Energy used in buildings accounts for around 20% of all energy related greenhouse gas emissions.
Thermal Mass
How well a material retains heat
Heating & Cooling Load
Energy required to maintain comfortable internal temperature. Defines energy efficiency of a conditioned space.
Glazing
Refers to complete window systems (glass & frame)
R-Value
Thermal Resistance (Insulation)
- Typically used for wall assemblies (Total R-Value)
U-Value
Thermal Conductance (opposite of R-Value)
- Typically used for glazing
SHGC
- Solar Admittance
Three key factors that contribute to energy efficiency of a building
1) Passive Solar Design
2) Building Sealing/Insulation
3) Appliances/Services
Two key building attributes that define energy efficiency requirements
Building Class & Climate Zone
Energy Efficiency Section in Vol One
Section J
What are the energy efficiency Performance
Requirements in NCC Volume One?
- reduce energy consumption and peak energy demand
- reduce greenhouse gas emissions
- improve occupant health and amenity.
Nathers and applicable NCC sections
Nathers = Nationwide Housing Energy Rating Scheme
- Used as a DTS solution
- Volume One (Class 2 & 4 SOUs)
- Volume Two (Class 01)
NatHERS Star Rating Requirements
Rating 1 -10 Measuring Annual Energy Load
Volume One (Class 2 & 4):
6 star SOU Minimum, 7 Star Collective Minimum
Volume Two (Class 1):
7 Star Minimum
Key DTS Provisions for Section J SOUs
- Nathers Rating
- Lighting Reqs
- Sealing Reqs
NABERS
National Australian Built Environment Scheme
- Verification Method for Section J (Class 3,5,6 & common areas of class 2)
Green Star
Rating software that benchmarks against a DTS Compliant Reference Building
- Verification Method for Section J (All Classes except Class 2 & 4 SOU)
Energy Efficiency Section Volume Two
H6
Performance Requirements in H6
Energy Usage & Thermal Performance
Can NatHERS meet all Section H6 reqs
No. There are other requirements too (sealing, lighting, etc…)
Alternative DTS to NAtHERS in H6
Compliance with relevant references ABCB Housing Provision Parts
Sections in Housing Provisions Energy Efficiency Part
Building Fabric
Building Glazing
Building Sealing
Whole of Home Energy Usage
Ceiling Fans
Services
