Part 3.12.5 Services
This Part applies to—
a Class 1 building; and
a Class 10a building; and
a Class 10b swimming pool associated with a Class 1 or 10a building.
Acceptable construction manual
A heated water supply system must be designed and installed in accordance with Part B2 of NCC Volume Three — Plumbing Code of Australia.
Acceptable construction practice
220.127.116.11 Insulation of services
Thermal insulation for central heating water piping and heating and cooling ductwork must—
be protected against the effects of weather and sunlight; and
be able to withstand the temperatures within the piping or ductwork; and
use thermal insulation material in accordance with AS/NZS 4859.1.
The central heating water piping provisions apply to systems designed to heat the building via water, such as a hydronic heating system.
18.104.22.168 Central heating water piping
Table 22.214.171.124 CENTRAL HEATING WATER PIPING—MINIMUM MATERIAL R-VALUE
|to be insulated|
|1, 2, 3 and 5||4, 6 and 7||8|
|2. located within a ventilated wall space, an enclosed building subfloor or a roof space|
|3. located outside the building or in an unenclosed building subfloor or roof space|
- The insulation levels in the following table are typical examples of materials that can be used to insulate central heating water piping calculated in accordance with AS/NZS 4859.1.
- The R-Value is that of the insulation and not the Total R-Value of the pipe, air film and insulation. Where piping has a significant inherent R-Value it may be subtracted from the material R-Value required. However, the inherent R-Value of most piping material is not sufficient to satisfy the requirements in Table 126.96.36.199.
- Piping within a timber member, such as that passing through a wall stud, is considered to have sufficient insulation for the purposes of Table 188.8.131.52.
- The following table provides examples for the R-Value of the insulation used for smaller diameter piping.
|9 mm of closed cell polymer||0.4|
|13 mm of closed cell polymer||0.6|
|19 mm of closed cell polymer||0.9|
|25 mm of closed cell polymer||1.3|
|25 mm of glasswool||1.3|
184.108.40.206 Heating and cooling ductwork
Heating and cooling ductwork and fittings must—
be sealed against air loss—
by closing all openings in the surface, joints and seams of ductwork with adhesives, mastics, sealants or gaskets in accordance with AS 4254 Parts 1 and 2 for a Class C seal; or
for flexible ductwork, with a draw band in conjunction with a sealant or adhesive tape.
Duct insulation must—
abut adjoining duct insulation to form a continuous barrier; and
be installed so that it maintains its position and thickness, other than at flanges and supports; and
where located outside the building, under a suspended floor, in an attached Class 10a building or in a roof space—
be protected by an outer sleeve of protective sheeting to prevent the insulation becoming damp; and
have the outer protective sleeve sealed with adhesive tape not less than 48 mm wide creating an airtight and waterproof seal.
The requirements of (a) do not apply to heating and cooling ductwork and fittings located within the insulated building envelope including a service riser within the conditioned space, internal floors between storeys and the like.
Ductwork within a fully insulated building may still benefit from insulation particularly when the system is only operating for short periods.
In some climate zones condensation may create problems with uninsulated ductwork and insulation should still be considered.
Table 220.127.116.11 HEATING AND COOLING DUCTWORK AND FITTINGS—MINIMUM MATERIAL R-VALUE
|Ductwork element||Minimum material for ductwork and fittings in each|
|Heating-only system or cooling-only system including an evaporative cooling system||Combined heating and refrigerated cooling system|
|1, 2, 3, 4, 5, 6 and 7||8||1, 2, 3, 4, 5, 6 and 7||2 and 5||8|
|Ductwork||1.0||1.5||1.5 (see note)||1.0||1.5|
- For information on an enclosed perimeter, refer to the explanatory information following Table 18.104.22.168.
- Insulation for refrigerated cooling ductwork should have a vapour barrier to prevent possible damage by condensation.
- The insulation levels in the following table are typical examples of materials that can be used to insulate ductwork and fittings and the R-Values they contribute. Other methods are available for meeting the minimum material R-Valuerequired by Table 22.214.171.124.
11 mm polyurethane
45 mm glasswool (11 kg/m3)
70 mm polyester (6.4 kg/m3)
63 mm glasswool (11 kg/m3)
90 mm polyester (8.9 kg/m3)
85 mm glasswool (11 kg/m3)
Sheetmetal ductwork — external insulation
38 mm glasswool (22 kg/m3)
50 mm polyester (20 kg/m3)
50 mm glasswool (22 kg/m3)
75 mm polyester (20 kg/m3)
Sheetmetal ductwork — internal insulation
38 mm glasswool (32 kg/m3)
50 mm polyester (32 kg/m3)
50 mm glasswool (32 kg/m3)
126.96.36.199 Electric resistance space heating
An electric resistance space heating system that serves more than one room must have—
separate isolating switches for each room; and
a separate temperature controller and time switch for each group of rooms with common heating needs; and
power loads of not more than 110 W/m2 for living areas, and 150 W/m2 for bathrooms.
188.8.131.52 Artificial lighting
5 W/m2 in a Class 1 building; and
4 W/m2 on a verandah, balcony or the like attached to a Class 1 building; and
3 W/m2 in a Class 10a building associated with a Class 1 building.
- There are two approaches available for achieving compliance with (a) in Class 1 and associated Class 10a buildings. These are through the determination of the lamp power density or the illumination power density.
- The first step in achieving compliance is to determine the relevant lamp power density or illumination power density allowance. Generally the lamp power density or illumination power density is the relevant value in (a)(i), (ii) or (iii), however the illumination power density allowance can be increased in accordance with (b) if a control device is used.
When illumination power density and one or more control devices are used, the adjustment factor is only applied to the space(s) served by the control device. The adjusted allowance for this space is then combined with the allowances for the remaining spaces using an area weighted average, which subsequently increases the allowance provided in (a)(i), (ii) or (iii).
When no control device is used, the adjustment factor is equal to 1.
- The design lamp power density is calculated by adding the maximum power ratings of all the permanently wired lamps in a space and dividing this sum by the area of the space.
- The design illumination power density is calculated by adding the illumination power load for each space and dividing this sum by the area of the space.
- To comply with (a), the design lamp power density or design illumination power density must be less than or equal to the allowance.
- Trading of allowances between (a)(i), (ii) and (iii) is not permitted.
- (a)(ii) includes outdoor living spaces such as verandahs, balconies, patios, alfresco spaces or the like that are attached to a Class 1 building.
- The artificial lighting requirements in 184.108.40.206 are to be read in conjunction with the artificial lighting requirements in 220.127.116.11.
Halogen lamps must be separately switched from fluorescent lamps.
Artificial lighting around the perimeter of a building must—
be controlled by a daylight sensor; or
have an average light source efficacy of not less than 40 Lumens/W.
The artificial lighting around the perimeter of a building does not need to comply to a maximum power density as neither the lighting required or the area of the space can be easily defined. Instead, external lights are required to be controlled by daylight sensors or to be efficient.
Table 18.104.22.168 ILLUMINATION POWER DENSITY ADJUSTMENT FACTOR FOR A CONTROL DEVICE
|Item||Description||Illumination power density adjustment factor|
|Lighting timer||For corridor lighting||0.7|
|Manual dimming system Note 1||Where not less than 75% of the area of a space is controlled by manually operated dimmers.||0.85|
|Programmable dimming system Note 2||Where not less than 75% of the area of a space is controlled by programmable dimmers.||0.85|
|Dynamic dimming system Note 3||Automatic compensation for lumen depreciation.||
The design lumen depreciation factor of not less than—
|Fixed dimming Note 4||Where at least 75% of the area is controlled by fixed dimmers that reduce the overall lighting level and the power consumption of the lighting.||% of full power to which the dimmer is set divided by 0.95.|
|Daylight sensor and dynamic lighting control device – dimmed or stepped switching of lights adjacent windows||0.5 Note 5|
||0.6 Note 5|
22.214.171.124 Water heater in a heated water supply system
A water heater in a heated water supply system must be designed and installed in accordance with Part B2 of NCC Volume Three — Plumbing Code of Australia.
126.96.36.199 Swimming pool heating and pumping
A time switch must be provided to control the operation of a circulation pump for a swimming pool.
Some jurisdictions may have requirements for a pool cover under the Smart Approved Water Mark Scheme.
188.8.131.52 Spa pool heating and pumping
A time switch must be provided to control the operation of a circulation pump for a spa pool having a capacity of 680 L or more.