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Specification 45 Modelling profiles for J1V5
Specification 45 Modelling profiles for J1V5
S45C1
Scope
New for 2022
To specify the modelling parameters necessary for demonstrating compliance via J1V5.
S45C2
Reference building sole-occupancy unit
New for 2022
The heating loads and cooling loads must be calculated for the reference building sole-occupancy unit in accordance with the following:
- J3D7, for roofs.
- J3D9, for wall-glazing construction.
- J3D10, for floors.
- J4D5, for roof lights.
- Solar absorptance of 0.6 for external walls and roofs.
- Open area of 3.8 x 10-4 m2 per m2 of zone façade area for façade air infiltration, separate to designed natural ventilation openings.
To specify modelling parameters for a reference building's sole-occupancy unit.
S45C2 requires that, for the purposes of J1V5, the external building fabric of the reference building sole-occupancy unit must comply with J3D7, J3D9, J3D10, and J4D5 as applicable. S45C2 also establishes solar absorptance values for external walls and roofs, as well as detailing a value for façade air infiltration, separate from the designated natural ventilation openings.
S45C3
Proposed building and reference building
New for 2022
- heating load or cooling load limits, calculated using heating degree hours, cooling degree hours and dehumidification gram hours from Table S45C3a; and
- energy value factors from Tables S45C3b and S45C3c; and
- location, in accordance with S34C3(3); and
- climatic data, using the Typical Meteorological Year weather files drawn from the years 1990 to 2015 published by CSIRO; and
- adjacent structures and features; and
- orientation; and
- building form, including—
- roof geometry; and
- floor plan; and
- number of storeys; and
- location, extent and configuration of ground floors and basements; and
- the size and location of glazing; and
- external doors; and
- walls between or bounding sole-occupancy units; and
- balconies; and
- testing standards, including for insulation, glazing, water heater and unitary air-conditioning equipment; and
-
fabric and glazing, including—
- thermal resistance of air films including any adjustment factors, moisture content of materials and the like; and
- internal shading devices, including their colour and criteria for operation; and
- system configuration and control of air-conditioning services and energy sources other than renewable energy generated on-site where present; and
- capacity and water usage, for on-site domestic heated water systems, assuming—
- a consumption rate in accordance with Table A.6.2 of AS/NZS 4234 of 10 L plus 1.25 L per m2 of floor area per sole-occupancy unit per day; and
- a seasonal load profile in accordance with Table A.6.3 of AS/NZS 4234; and
- a water inlet temperature of the monthly ground temperature in accordance with Table A.8 of AS/NZS 4234; and
- a water outlet temperature of 60°C; and
- the same calculation method for standing losses; and
- internal heating loads, in accordance with Table S45C3d; and
- occupancy profiles, in accordance with Tables S45C3e, S45C3f, S45C3g, S45C3h, S45C3i, S45C3j, S45C3k and S45C3l; and
- internal zoning, assuming—
- daytime air-conditioned zones include at least one living space and one dining space; and
- kitchen zones are a separate zone using virtual wall partitions at all times, and are only air-conditioned if adjacent to an external façade; and
- each bedroom is a night-time air-conditioned zone; and
- all other zones, including pantries, corridors, en-suites, walk-in robes, bathrooms, toilets, laundries and adjacent roof space or basement are unconditioned; and
- the same assumptions and means of calculating the temperature difference across air-conditioning zone boundaries; and
- the same floor coverings, furniture and fittings density; and
- the same internal artificial lighting illumination levels.
- in climate zone 2 to 8, a heating thermostat setting of—
- 20°C for all conditioned zones from 6:00 am to 12:00 am; and
- 18°C at all other times; and
- a cooling thermostat setting of—
- in climate zones 1, 2 and 3, 27°C for all daytime conditioned zones from 6:00 am to 11:00 pm; and
- in climate zone 4, 26°C for all daytime conditioned zones from 6:00 am to 11:00 pm; and
- in climate zone 5, 25°C for all daytime conditioned zones from 6:00 am to 11:00 pm; and
- in climate zones 6 and 7, 24°C for all daytime conditioned from 6:00 am to 11:00pm; and
- in climate zone 8, 23°C for all daytime conditioned zones from 6:00 am to 11:00 pm; and
- in all climate zones, a constant cooling thermostat setting of 24°C for all night-time conditioned zones.
- frequency of data output, being at least hourly; and
- opening flow properties in accordance with Table S45C3m; and
- wind pressure coefficients in accordance with Tables S45C3n and S45C3o; and
- infiltration values, unless building sealing is verified using J1V4, in which case infiltration values equal to the intended building air change rate at 50 Pa divided by 20 may be used for the proposed building only; and
- operation settings as follows:
- openings must shut when the external dry bulb temperature is less than or equal to a temperature 1°C higher than the air-conditioning service cooling set point; and
- openings must shut when the external dry bulb temperature is greater than or equal to a temperature 1°C lower than the air-conditioning service heating set point; and
- openings must remain open for all hours of the year that do not meet the above closing conditions.
Climate zone | Location | Annual heating degree hours | Annual cooling degree hours | Annual dehumidification gram hours |
---|---|---|---|---|
1 | Darwin | 0 | 15770 | 15364 |
1 | Port Hedland | 859 | 16540 | 8011 |
1 | Townsville | 595 | 6392 | 5843 |
1 | Weipa | 4 | 12144 | 12565 |
1 | Wyndham | 126 | 26975 | 9184 |
1 | Willis Island | N/A | N/A | N/A |
1 | Cairns | 268 | 6411 | 6030 |
1 | Broome | 624 | 14749 | 14083 |
2 | Rockhampton | 3283 | 6717 | 1701 |
2 | Amberley | 10958 | 4483 | 290 |
2 | Brisbane | 4744 | 2228 | 1415 |
2 | Coffs Harbour | 7137 | 1309 | 231 |
2 | Mackay | 976 | 3183 | 5214 |
2 | Gladstone | 568 | 4307 | 3543 |
2 | Oakey | 15392 | 3979 | 40 |
3 | Longreach | 6002 | 14634 | 505 |
3 | Carnarvon | 2260 | 4810 | 1023 |
3 | Alice Springs | 11767 | 13149 | 125 |
3 | Charleville | 11284 | 9580 | 230 |
3 | Halls Creek | 611 | 19571 | 2109 |
3 | Tennant Creek | 1171 | 18644 | 1747 |
3 | Mount Isa | 3060 | 15813 | 1797 |
3 | Newman | 6286 | 15240 | 645 |
4 | Moree | 13986 | 7291 | 151 |
4 | Wagga | 24833 | 4678 | 0 |
4 | Mildura | 19003 | 6300 | 11 |
4 | Meekatharra | 6883 | 12766 | 67 |
4 | Oodnadatta | 8352 | 13845 | 18 |
4 | Kalgoorlie | 13048 | 7763 | 31 |
4 | Woomera | 11754 | 8434 | 3 |
4 | Cobar | 13663 | 7616 | 101 |
4 | Dubbo | 20431 | 5332 | 36 |
4 | Giles | 6259 | 13082 | 81 |
5 | Geraldton | 6846 | 6365 | 10 |
5 | Perth | 11024 | 6084 | 0 |
5 | Williamtown | 11713 | 2802 | 276 |
5 | Adelaide | 13066 | 5132 | 0 |
5 | Sydney RO (Observatory Hill) | 7079 | 1466 | 129 |
5 | Bickley | 15664 | 4015 | 34 |
5 | Swanbourne | 6322 | 3332 | 63 |
5 | Ceduna | 14061 | 5212 | 53 |
5 | Mandurah | 6081 | 3131 | 2 |
5 | Esperance | 11009 | 1884 | 0 |
5 | Manjimup | 20910 | 2531 | 0 |
5 | Mascot (Sydney Airport) | 6357 | 1596 | 110 |
6 | Nowra | 14813 | 2801 | 56 |
6 | Melbourne RO | 14494 | 2416 | 0 |
6 | East Sale | 27229 | 1259 | 0 |
6 | Katanning | 21496 | 3566 | 14 |
6 | Forrest | 15294 | 8410 | 14 |
6 | Albany | 16131 | 932 | 0 |
6 | Mount Lofty | 41095 | 1626 | 0 |
6 | Tullamarine (Melbourne Airport) | 23496 | 2764 | 0 |
6 | Mount Gambier | 28496 | 2764 | 0 |
6 | Moorabbin | 20249 | 2291 | 0 |
6 | Warnambool | 27285 | 1406 | 1 |
6 | Cape Otway | 19279 | 960 | 3 |
6 | Richmond | 15607 | 3917 | 60 |
7 | Armidale | 33374 | 1039 | 9 |
7 | Launceston (Ti Tree Bend) | 30952 | 833 | 0 |
7 | Canberra | 35153 | 2863 | 0 |
7 | Cabramurra | 65831 | 79 | 0 |
7 | Hobart | 28542 | 451 | 0 |
7 | Orange | 40325 | 1192 | 2 |
7 | Ballarat | 37873 | 2585 | 2 |
7 | Low Head | 26047 | 80 | 0 |
7 | Launceston Airport | 39444 | 456 | 0 |
7 | Learmonth | 1646 | 14048 | 958 |
8 | Thredbo (Village) | 61209 | 147 | 0 |
Table Notes
If location is not listed, use the nearest appropriate.
Fuel type | ACT | NSW | NT | Qld | SA | Tas | Vic | WA |
---|---|---|---|---|---|---|---|---|
Electricity: peak (kWh) | 1.55 | 1.53 | 1.54 | 1.53 | 1.54 | 1.55 | 1.53 | 1.54 |
Electricity: shoulder (kWh) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
Electricity: off-peak (kWh) | 0.78 | 0.79 | 0.79 | 0.79 | 0.78 | 0.78 | 0.79 | 0.79 |
Electricity: cont. load (kWh) | 0.68 | 0.54 | 1.11 | 0.76 | 0.62 | 0.70 | 0.82 | 0.47 |
Natural gas (MJ) | 0.18 | 0.14 | 0.16 | 0.24 | 0.13 | 0.21 | 0.10 | 0.16 |
Electricity: PV export (kWh) | 0.42 | 0.39 | 1.10 | 0.51 | 0.35 | 0.50 | 0.53 | 0.29 |
Hour | Hour span | Weekday |
---|---|---|
1 | 24-1 | Off-peak |
2 | 1-2 | Off-peak |
3 | 2-3 | Off-peak |
4 | 3-4 | Off-peak |
5 | 4-5 | Off-peak |
6 | 5-6 | Off-peak |
7 | 6-7 | Off-peak |
8 | 7-8 | Peak |
9 | 8-9 | Peak |
10 | 9-10 | Shoulder |
11 | 10-11 | Shoulder |
12 | 11-12 | Shoulder |
13 | 12-13 | Shoulder |
14 | 13-14 | Shoulder |
15 | 14-15 | Shoulder |
16 | 15-16 | Shoulder |
17 | 16-17 | Peak |
18 | 17-18 | Peak |
19 | 18-19 | Peak |
20 | 19-20 | Peak |
21 | 20-21 | Shoulder |
22 | 21-22 | Shoulder |
23 | 22-23 | Off-peak |
24 | 23-24 | Off-peak |
Sole-occupancy unit area (excluding garage) (m2) | Occupancy (m2/person) | Day time lighting power density (6:00 am to 6:00 pm) (W/m2) | Night-time lighting power density (6:00 pm to 6:00 am) (W/m2) | Cooking in kitchen zone only (W/m2 kitchen area) | Appliances (except oven) in whole sole-occupancy unit (W/m2) |
---|---|---|---|---|---|
≤ 100 | 41.2 | 4.0 | 4.0 | 36.2 | 4.38 |
> 100 to ≤ 125 | 44.3 | 4.0 | 4.0 | 34.7 | 3.52 |
> 125 to ≤ 150 | 47.8 | 4.0 | 4.0 | 28.9 | 2.99 |
> 150 to ≤ 175 | 51.7 | 4.0 | 4.0 | 24.8 | 2.60 |
> 175 to ≤ 200 | 55.8 | 4.0 | 4.0 | 25.3 | 2.26 |
> 200 to ≤ 225 | 60.0 | 4.0 | 4.0 | 22.5 | 2.02 |
> 225 to ≤ 250 | 64.4 | 4.0 | 4.0 | 20.2 | 1.84 |
> 250 to ≤ 275 | 68.9 | 4.0 | 4.0 | 18.4 | 1.68 |
> 275 to ≤ 300 | 73.3 | 4.0 | 4.0 | 16.9 | 1.55 |
> 300 to ≤ 325 | 77.5 | 4.0 | 4.0 | 15.6 | 1.44 |
> 325 to ≤ 350 | 81.6 | 4.0 | 4.0 | 14.5 | 1.34 |
> 350 to ≤ 375 | 85.4 | 4.0 | 4.0 | 13.5 | 1.26 |
> 375 | 89.0 | 4.0 | 4.0 | 12.7 | 1.19 |
Time period (local standard time) | December to February | June to August | March to May, September to November |
---|---|---|---|
12:00 am to 1:00 am | 0% | 0% | 0% |
1:00 am to 2:00 am | 0% | 0% | 0% |
2:00 am to 3:00 am | 0% | 0% | 0% |
3:00 am to 4:00 am | 0% | 0% | 0% |
4:00 am to 5:00 am | 0% | 0% | 0% |
5:00 am to 6:00 am | 0% | 0% | 0% |
6:00 am to 7:00 am | 5% | 10% | 5% |
7:00 am to 8:00 am | 5% | 10% | 5% |
8:00 am to 9:00 am | 0% | 0% | 0% |
9:00 am to 10:00 am | 0% | 0% | 0% |
10:00 am to 11:00 am | 0% | 0% | 0% |
11:00 am to 12:00 pm | 0% | 0% | 0% |
12:00 pm to 1:00 pm | 0% | 0% | 0% |
1:00 pm to 2:00 pm | 0% | 0% | 0% |
2:00 pm to 3:00 pm | 0% | 0% | 0% |
3:00 pm to 4:00 pm | 0% | 0% | 0% |
4:00 pm to 5:00 pm | 5% | 5% | 5% |
5:00 pm to 6:00 pm | 15% | 20% | 20% |
6:00 pm to 7:00 pm | 25% | 30% | 25% |
7:00 pm to 8:00 pm | 30% | 35% | 30% |
8:00 pm to 9:00 pm | 25% | 30% | 30% |
9:00 pm to 10:00 pm | 20% | 25% | 25% |
10:00 pm to 11:00 pm | 10% | 15% | 15% |
11:00 pm to 12:00 am | 0% | 0% | 0% |
Time period (local standard time) | December to February | June to August | March to May, September to November |
---|---|---|---|
12:00 am to 1:00 am | 0% | 0% | 0% |
1:00 am to 2:00 am | 0% | 0% | 0% |
2:00 am to 3:00 am | 0% | 0% | 0% |
3:00 am to 4:00 am | 0% | 0% | 0% |
4:00 am to 5:00 am | 0% | 0% | 0% |
5:00 am to 6:00 am | 0% | 0% | 0% |
6:00 am to 7:00 am | 5% | 10% | 5% |
7:00 am to 8:00 am | 5% | 10% | 5% |
8:00 am to 9:00 am | 0% | 0% | 0% |
9:00 am to 10:00 am | 0% | 0% | 0% |
10:00 am to 11:00 am | 0% | 0% | 0% |
11:00 am to 12:00 pm | 0% | 0% | 0% |
12:00 pm to 1:00 pm | 0% | 0% | 0% |
1:00 pm to 2:00 pm | 0% | 0% | 0% |
2:00 pm to 3:00 pm | 0% | 0% | 0% |
3:00 pm to 4:00 pm | 0% | 0% | 0% |
4:00 pm to 5:00 pm | 0% | 0% | 0% |
5:00 pm to 6:00 pm | 15% | 20% | 20% |
6:00 pm to 7:00 pm | 25% | 30% | 25% |
7:00 pm to 8:00 pm | 30% | 35% | 30% |
8:00 pm to 9:00 pm | 25% | 30% | 30% |
9:00 pm to 10:00 pm | 20% | 25% | 25% |
10:00 pm to 11:00 pm | 10% | 15% | 10% |
11:00 pm to 12:00 am | 0% | 0% | 0% |
Time period (local standard time) | December to February | June to August | March to May, September to November |
---|---|---|---|
12:00 am to 1:00 am | 0% | 0% | 0% |
1:00 am to 2:00 am | 0% | 0% | 0% |
2:00 am to 3:00 am | 0% | 0% | 0% |
3:00 am to 4:00 am | 0% | 0% | 0% |
4:00 am to 5:00 am | 0% | 0% | 0% |
5:00 am to 6:00 am | 0% | 0% | 0% |
6:00 am to 7:00 am | 0% | 0% | 0% |
7:00 am to 8:00 am | 5% | 5% | 5% |
8:00 am to 9:00 am | 10% | 10% | 10% |
9:00 am to 10:00 am | 15% | 15% | 15% |
10:00 am to 11:00 am | 10% | 15% | 10% |
11:00 am to 12:00 pm | 15% | 15% | 15% |
12:00 pm to 1:00 pm | 15% | 20% | 20% |
1:00 pm to 2:00 pm | 15% | 25% | 20% |
2:00 pm to 3:00 pm | 15% | 20% | 20% |
3:00 pm to 4:00 pm | 15% | 15% | 15% |
4:00 pm to 5:00 pm | 20% | 25% | 20% |
5:00 pm to 6:00 pm | 30% | 50% | 40% |
6:00 pm to 7:00 pm | 60% | 100% | 80% |
7:00 pm to 8:00 pm | 70% | 90% | 80% |
8:00 pm to 9:00 pm | 40% | 40% | 40% |
9:00 pm to 10:00 pm | 20% | 20% | 20% |
10:00 pm to 11:00 pm | 10% | 10% | 10% |
11:00 pm to 12:00 am | 5% | 5% | 5% |
Time period (local standard time) | December to February | June to August | March to May, September to November |
---|---|---|---|
12:00 am to 1:00 am | 45% | 45% | 45% |
1:00 am to 2:00 am | 40% | 40% | 40% |
2:00 am to 3:00 am | 35% | 40% | 35% |
3:00 am to 4:00 am | 35% | 40% | 35% |
4:00 am to 5:00 am | 35% | 40% | 35% |
5:00 am to 6:00 am | 40% | 40% | 40% |
6:00 am to 7:00 am | 50% | 55% | 50% |
7:00 am to 8:00 am | 60% | 75% | 65% |
8:00 am to 9:00 am | 50% | 55% | 50% |
9:00 am to 10:00 am | 45% | 50% | 50% |
10:00am to 11:00 am | 45% | 55% | 50% |
11:00 am to 12:00 pm | 45% | 50% | 45% |
12:00 pm to 1:00 pm | 45% | 50% | 45% |
1:00 pm to 2:00 pm | 45% | 50% | 45% |
2:00 pm to 3:00 pm | 45% | 50% | 45% |
3:00 pm to 4:00 pm | 45% | 50% | 45% |
4:00 pm to 5:00 pm | 70% | 85% | 75% |
5:00 pm to 6:00 pm | 85% | 100% | 90% |
6:00 pm to 7:00 pm | 75% | 85% | 80% |
7:00 pm to 8:00 pm | 60% | 70% | 65% |
8:00 pm to 9:00 pm | 65% | 75% | 70% |
9:00 pm to 10:00 pm | 60% | 70% | 65% |
10:00 pm to 11:00 pm | 55% | 60% | 55% |
11:00 pm to 12:00 am | 50% | 55% | 50% |
Time period (local standard time) | Weekdays | Weekends |
---|---|---|
12:00 am to 1:00 am | 0% | 0% |
1:00 am to 2:00 am | 0% | 0% |
2:00 am to 3:00 am | 0% | 0% |
3:00 am to 4:00 am | 0% | 0% |
4:00 am to 5:00 am | 0% | 0% |
5:00 am to 6:00 am | 0% | 0% |
6:00 am to 7:00 am | 30% | 30% |
7:00 am to 8:00 am | 30% | 30% |
8:00 am to 9:00 am | 100% | 30% |
9:00 am to 10:00 am | 100% | 100% |
10:00 am to 11:00 am | 50% | 100% |
11:00 am to 12:00 pm | 50% | 100% |
12:00 pm to 1:00 pm | 50% | 100% |
1:00 pm to 2:00 pm | 50% | 50% |
2:00 pm to 3:00 pm | 50% | 50% |
3:00 pm to 4:00 pm | 50% | 50% |
4:00 pm to 5:00 pm | 100% | 50% |
5:00 pm to 6:00 pm | 100% | 50% |
6:00 pm to 7:00 pm | 100% | 100% |
7:00 pm to 8:00 pm | 100% | 100% |
8:00 pm to 9:00 pm | 100% | 100% |
9:00 pm to 10:00 pm | 30% | 100% |
10:00 pm to 11:00 pm | 30% | 30% |
11:00 pm to 12:00 am | 0% | 0% |
Time period (local standard time) | Heating, ventilation and air-conditioning on/off |
---|---|
12:00 am to 1:00 am | Off |
1:00 am to 2:00 am | Off |
2:00 am to 3:00 am | Off |
3:00 am to 4:00 am | Off |
4:00 am to 5:00 am | Off |
5:00 am to 6:00 am | Off |
6:00 am to 7:00 am | On |
7:00 am to 8:00 am | On |
8:00 am to 9:00 am | On |
9:00 am to 10:00 am | On |
10:00 am to 11:00 am | On |
11:00 am to 12:00 pm | On |
12:00 pm to 1:00 pm | On |
1:00 pm to 2:00 pm | On |
2:00 pm to 3:00 pm | On |
3:00 pm to 4:00 pm | On |
4:00 pm to 5:00 pm | On |
5:00 pm to 6:00 pm | On |
6:00 pm to 7:00 pm | On |
7:00 pm to 8:00 pm | On |
8:00 pm to 9:00 pm | On |
9:00 pm to 10:00 pm | On |
10:00 pm to 11:00 pm | On |
11:00 pm to 12:00 am | Off |
Table Notes
If windows are open in accordance with S45C3(3)(e), the heating, ventilation and air-conditioning schedule must be Off.
Time period (local standard time) | Weekdays | Weekends |
---|---|---|
12:00 am to 1:00 am | 100% | 100% |
1:00 am to 2:00 am | 100% | 100% |
2:00 am to 3:00 am | 100% | 100% |
3:00 am to 4:00 am | 100% | 100% |
4:00 am to 5:00 am | 100% | 100% |
5:00 am to 6:00 am | 100% | 100% |
6:00 am to 7:00 am | 50% | 50% |
7:00 am to 8:00 am | 50% | 50% |
8:00 am to 9:00 am | 50% | 50% |
9:00 am to 10:00 am | 0% | 0% |
10:00 am to 11:00 am | 0% | 0% |
11:00 am to 12:00 pm | 0% | 0% |
12:00 pm to 1:00 pm | 0% | 0% |
1:00 pm to 2:00 pm | 0% | 0% |
2:00 pm to 3:00 pm | 0% | 0% |
3:00 pm to 4:00 pm | 0% | 0% |
4:00 pm to 5:00 pm | 0% | 0% |
5:00 pm to 6:00 pm | 0% | 0% |
6:00 pm to 7:00 pm | 50% | 50% |
7:00 pm to 8:00 pm | 50% | 50% |
8:00 pm to 9:00 pm | 50% | 50% |
9:00 pm to 10:00 pm | 100% | 100% |
10:00 pm to 11:00 pm | 100% | 100% |
11:00 pm to 12:00 am | 100% | 100% |
Time period (local standard time) | All days, heating, ventilation and air-conditioning on/off |
---|---|
12:00 am to 1:00 am | On |
1:00 am to 2:00 am | On |
2:00 am to 3:00 am | On |
3:00 am to 4:00 am | On |
4:00 am to 5:00 am | On |
5:00 am to 6:00 am | On |
6:00 am to 7:00 am | On |
7:00 am to 8:00 am | On |
8:00 am to 9:00 am | On |
9:00 am to 10:00 am | Off |
10:00 am to 11:00 am | Off |
11:00 am to 12:00 pm | Off |
12:00 pm to 1:00 pm | Off |
1:00 pm to 2:00 pm | Off |
2:00 pm to 3:00 pm | Off |
3:00 pm to 4:00 pm | Off |
4:00 pm to 5:00 pm | Off |
5:00 pm to 6:00 pm | Off |
6:00 pm to 7:00 pm | On |
7:00 pm to 8:00 pm | On |
8:00 pm to 9:00 pm | On |
9:00 pm to 10:00 pm | On |
10:00 pm to 11:00 pm | On |
11:00 pm to 12:00 am | On |
Table Notes
If windows are open in accordance with S45C3(3)(e), the Heating, ventilation and air-conditioning schedule must be Off.
Exposure type | Façade component | Wind direction (0° perpendicular to face) | ||||
---|---|---|---|---|---|---|
0 | 45 | 90 | 135 | 180 | ||
Exposed | Wall | 0.70 | 035 | -0.50 | -0.40 | -0.20 |
Roof pitch < 10 degrees | -0.80 | -0.70 | -0.60 | -0.50 | -0.40 | |
Roof pitch 10 to 30 degrees | -0.40 | -0.50 | -0.60 | -0.50 | -0.40 | |
Roof pitch > 30 degrees | 0.30 | -0.40 | -0.60 | -0.40 | -0.50 | |
Semi-exposed | Wall | 0.40 | 0.10 | -0.30 | -0.35 | -0.20 |
Roof pitch < 10 degrees | -0.60 | -0.50 | -0.40 | -0.50 | -0.60 | |
Roof pitch 10 to 30 degrees | -0.35 | -0.45 | -0.55 | -0.45 | -0.35 | |
Roof pitch > 30 degrees | 0.30 | -0.50 | -0.60 | -0.50 | -0.50 | |
Sheltered | Wall | 0.20 | 0.05 | -0.25 | -0.30 | -0.25 |
Roof pitch < 10 degrees | -0.50 | -0.50 | -0.40 | -0.50 | -0.50 | |
Roof pitch 10 to 30 degrees | -0.30 | -0.40 | -0.50 | -0.40 | -0.30 | |
Roof pitch > 30 degrees | 0.25 | -0.30 | -0.50 | -0.30 | -0.40 |
Table Notes
Pressure coefficient exposure categories are defined as follows:
- Exposed – no obstructions surrounding the building (e.g. open fields or bodies of water).
- Semi-exposed – some obstructions comparable to the height of the building on some but not all sides.
- Sheltered – obstructions comparable to the height of the building on all sides.
Exposure type | Façade component | Wind direction (0° perpendicular to face) | ||||
---|---|---|---|---|---|---|
0 | 45 | 90 | 135 | 180 | ||
Exposed | Wall h/H = 0.0 | 0.30 | 0.22 | -0.23 | -0.43 | -0.24 |
Wall h/H = 0.2 | 0.32 | 0.22 | -0.43 | -0.44 | -0.25 | |
Wall h/H = 0.4 | 0.39 | 0.16 | -0.56 | -0.43 | -0.27 | |
Wall h/H = 0.6 | 0.55 | 0.24 | -0.62 | -0.41 | -0.29 | |
Wall h/H = 0.8 | 0.65 | 0.32 | -0.65 | -0.39 | -0.28 | |
Wall h/H = 1.0 | 0.40 | 0.15 | -0.65 | -0.38 | -0.26 | |
Flat roof h/H = 0.0 | -0.23 | -0.23 | -0.23 | -0.23 | -0.23 | |
Flat roof h/H = 0.2 | -0.43 | -0.43 | -0.43 | -0.43 | -0.43 | |
Flat roof h/H = 0.4 | -0.56 | -0.56 | -0.56 | -0.56 | -0.56 | |
Flat roof h/H = 0.6 | -0.62 | -0.62 | -0.62 | -0.62 | -0.62 | |
Flat roof h/H = 0.8 | -0.65 | -0.65 | -0.65 | -0.65 | -0.65 | |
Flat roof h/H = 1.0 | -0.65 | -0.65 | -0.65 | -0.65 | -0.65 | |
Semi-exposed | Wall h/H = 0.0 | 0.19 | 0.08 | -0.15 | -0.28 | -0.15 |
Wall h/H = 0.2 | 0.20 | 0.08 | -0.28 | -0.29 | -0.16 | |
Wall h/H = 0.4 | 0.25 | 0.10 | -0.36 | -0.28 | -0.18 | |
Wall h/H = 0.6 | 0.36 | 0.16 | -0.40 | -0.27 | -0.19 | |
Wall h/H = 0.8 | 0.42 | 0.20 | -0.42 | -0.25 | -0.18 | |
Wall h/H = 1.0 | 0.26 | 0.10 | -0.42 | -0.25 | -0.17 | |
Flat roof h/H = 0.0 | -0.15 | -0.15 | -0.15 | -0.15 | -0.15 | |
Flat roof h/H = 0.2 | -0.28 | -0.28 | -0.28 | -0.28 | -0.28 | |
Flat roof h/H = 0.4 | -0.36 | -0.36 | -0.36 | -0.36 | -0.36 | |
Flat roof h/H = 0.6 | -0.40 | -0.40 | -0.40 | -0.40 | -0.40 | |
Flat roof h/H = 0.8 | -0.42 | -0.42 | -0.42 | -0.42 | -0.42 | |
Flat roof h/H = 1.0 | -0.42 | -0.42 | -0.42 | -0.42 | -0.42 | |
Sheltered | Wall h/H = 0.0 | 0.10 | 0.04 | -0.08 | -0.15 | -0.08 |
Wall h/H = 0.2 | 0.11 | 0.04 | -0.15 | -0.15 | -0.08 | |
Wall h/H = 0.4 | 0.13 | 0.05 | -0.19 | -0.15 | -0.09 | |
Wall h/H = 0.6 | 0.19 | 0.08 | -0.21 | -0.14 | -0.10 | |
Wall h/H = 0.8 | 0.22 | 0.11 | -0.22 | -0.13 | -0.09 | |
Wall h/H = 1.0 | 0.32 | 0.05 | -0.22 | -0.13 | -0.09 | |
Flat roof h/H = 0.0 | -0.08 | -0.08 | -0.08 | -0.08 | -0.08 | |
Flat roof h/H = 0.2 | -0.15 | -0.15 | -0.15 | -0.15 | -0.15 | |
Flat roof h/H = 0.4 | -0.19 | -0.19 | -0.19 | -0.19 | -0.19 | |
Flat roof h/H = 0.6 | -0.21 | -0.21 | -0.21 | -0.21 | -0.21 | |
Flat roof h/H = 0.8 | -0.22 | -0.22 | -0.22 | -0.22 | -0.22 | |
Flat roof h/H = 1.0 | -0.22 | -0.22 | -0.22 | -0.22 | -0.22 |
Table Notes
- Pressure coefficient exposure categories are defined as follows:
- Exposed – no obstructions surrounding the building (e.g. open fields or bodies of water).
- Semi-exposed – some obstructions comparable to the height of the building on some but not all sides.
- Sheltered – obstructions comparable to the building height on all sides.
- h = height of natural ventilation opening above ground.
- H = height of roof of building above ground.
To specify parameters for proposed and reference buildings when using J1V5.
S45C3 contains modelling parameters that are to be applied to the reference and proposed buildings. The modelling parameters are numerous and detailed, and include heating and cooling load limits, calculated using data for heating and cooling degree hours and dehumidification gram hours from Table S45C3a.
S45C3(1)(d) requires that modelling use the appropriate climate data for the location of the building, or the nearest appropriate location with similar climactic conditions. This does not necessarily mean the nearest geographical location. Climatic data must be sourced from Typical Meteorological Year weather files published by CSIRO for the years 1990 to 2015. Both buildings must also be modelled with identical adjacent structures and features, orientation, building form, fabric and glazing, among other factors. The internal heating loads and occupancy profiles are to be obtained from Tables S45C3d through S45C3l.
S45C3(2) stipulates that modelling use identical air-conditioning services parameters, including heating and cooling thermostat values.
Finally, S45C3(3) specifies modelling parameters related to natural ventilation. It sets minimum requirements for the frequency of data output, opening flow properties, and wind pressure coefficients and infiltration value. It also specifies the conditions under which openings should be closed or remain open, based on external dry bulb temperatures.