Environmental and health related criteria for buildings - ANEC

IBO - Environmental and Health related Criteria for Buildings
renewable electricity generation system is awarded up to 10 points (of 38 possible energy
points) depending on the percentage of the annual reference electrical load met by this
system (1 point per every 3%).
The following examples shall illustrate the energy performance standard of LEED for Homes:
Example “Basic and enhanced insulation”
- Basic insulation must meet or exceed the R-value requirements of Chapter 4 of 2004
IECC 31 (International Energy Conservation Code).
- Enhanced insulation exceeds R-value requirements of Chapter 4 of 2004 IECC by at
least 5%.
IECC 2004, Selected U-factors in SI units [W/(m²K)]
Climatic
Zone
Ceiling Wood
Frame Wall
Massive
Wall
Floor Basement
Wall
Crawl
Space Wall
1
2
3
0.20
0.20
0.20
0.47
0.47
0.47
1.12
0.94
0.80
0.36
0.36
0.27
2.04
2.04
2.04
2.71
2.71
0.77
4 (except
Marine)
0.17
0.47
0.80
0.27
0.34
0.37
5 (and
Marine 4)
6
7 and 8
0.17
0.15
0.15
0.34
0.34
0.32
0.47
0.34
0.32
0.19
0.19
0.19
0.34
0.34
0.34
0.37
0.37
0.37
Source: Laustsen, J.; Energy Efficiency Requirements in Building Codes, Energy Efficiency Policies for New
Buildings (IEA InformationPaper in Support of the G8 Plan of Action, March 2008), p. 44
IECC 2004, Climatic zones
Zone number Thermal Criteria
IP Units
SI units
1
2
3A and 3B
4A and 4B
3C
4C
5
6
7
8
9000 < CDD50°F
6300 < CDD50°F ≤ 9000
4500 < CDD50°F ≤ 6300 and
HDD65°F ≤ 5400
CDD50°F ≤ 4500 and
HDD65°F ≤ 5400
HDD65°F ≤ 3600
3600 < HDD65°F ≤ 5400
5400 < HDD65°F ≤ 7200
7200 < HDD65°F ≤ 9000
9000 < HDD65°F ≤ 12600
12600 < HDD65°F
5000 < CDD10°C
3500 < CDD10°C ≤ 5000
2500 < CDD10°C ≤ 3500 and HDD18°C
≤ 5400
CDD10°C ≤ 4500 and
HDD18°C ≤ 5400
HDD18°C ≤ 3600
3600 < HDD18°C ≤ 5400
5400 < HDD18°C ≤ 7200
7200 < HDD18°C ≤ 9000
9000 < HDD18°C ≤ 12600
12600 < HDD18°C
31 IECC = International Energy Conservation Code 2004. “IECC 2004 is a model building code or standard for
energy efficiency of new buildings. It was devised by the International Code Council (ICC), and is based on US
conditions and traditions for energy efficiency regulation. The code IECC 2004 sets rules for residential (with less
than 4 floors) and for small and less complicated commercial buildings while it contains a reference for the
ASHRAE for large and complex buildings. Rules are based on climatic zones, which are set based on cooling
degree days CDD and heating degree days HDD and some humidity conditions. In general, the US is split into 8
different zones, based on the level of cooling and heating. Some humidity conditions divide the zones into dry,
humid and marine areas. Rules are set as prescriptive values for building parts, heating and cooling systems,
ventilation and lighting. Insulation requirements are set as R-values or U-factor where U = 1/R for each climatic
zone separately. These values have to be fulfilled for each building part in the prescriptive model. …
IEEC also includes a trade-off model where some parts can be made with less energy efficiency as long as the
total building still fulfils the same overall requirements which would be the result of fulfilling each single demand. ..
The prescriptive model is described as Mandatory Requirements, while the trade-off model is referred to as
Performance Based requirements.” Laustsen, J.; Energy Efficiency Requirements in Building Codes, Energy
Efficiency Policies for New Buildings (IEA InformationPaper in Support of the G8 Plan of Action, March 2008)
Final Report 69 31 03 2011