Specification 45 Modelling profiles for J1V5
S45C1
Scope
New for 2022
This Specification contains the required modelling parameters for J1V5 .
Archive Number
State variations
x Clear variation
ACT
NSW
NT
QLD
SA
TAS
VIC
WA
S45C2
Reference building sole-occupancy unit
New for 2022
Archive Number
State variations
x Clear variation
ACT
NSW
NT
QLD
SA
TAS
VIC
WA
S45C3
Proposed building and reference building
New for 2022
(1) The heating load , cooling load and energy value for J1V5(1) and (2) must be calculated for both the proposed building and the reference building sole-occupancy unit using the same—
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.
(2) Where present, the air-conditioning services , including all centralised domestic services infrastructure, of each sole-occupancy unit of both the proposed building and the reference building must be modelled with—
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.
(3) Natural ventilation of each sole-occupancy unit of the proposed building and the reference building must be modelled with the same—
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.
Table S45C3a Annual heating degree hours, cooling degree hours and dehumidification gram hours for various locations
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.
Table S45C3b Energy factors based on fuel type
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
Table S45C3c Electricity usage — timing for categories of usage
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
Table S45C3d Internal heat loads for lighting, cooking and appliances
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
Table S45C3e Lighting schedules for daytime zones
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%
Table S45C3f Lighting schedules for night-time zones
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%
Table S45C3g Cooking schedules
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%
Table S45C3h Appliance schedule for all zones
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%
Table S45C3i Occupancy schedules
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%
Table S45C3j Heating, ventilation and air-conditioning schedules for daytime zones
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.
Table S45C3k Occupancy schedules for night-time zones
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%
Table S45C3l Heating, ventilation and air-conditioning schedules for night-time zones
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.
Table S45C3m Window opening area percentage
Window type
Opening area
Any window with restricted opening due to safety requirements
10%
Sliding and double hung
45%
Casement, awning, louvre, bi-fold, pivot, tilt and turn and French
90%
Table S45C3n Wind pressure coefficients for natural ventilation of low-rise buildings (total height less than 12 m)
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.
Table S45C3o Wind pressure coefficients for natural ventilation of high-rise building (total height more than 12 m)
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.
Archive Number
State variations
x Clear variation
ACT
NSW
NT
QLD
SA
TAS
VIC
WA