NCC 2016 Volume Two
Search the National Construction Code editions
Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c

Filter

Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c
ACT 7.1.6 Services - Application of Part 3.12.5

ACT 7.1.6 Services - Application of Part 3.12.5

(a)

In applying Part 3.12.5 to an addition or extension all requirements of the part must be satisfied except as provided otherwise in (b) or (c) below.

(b)

If the addition or extension houses or has mounted on it or in association with it, a heater or pump to which 3.12.5.4, 3.12.5.6 or 3.12.5.7 applies, the heater or pump must comply with those provisions unless—

(i)

the service is a heater or pump that has been relocated from the existing part of the building as part of constructing the addition or extension; and

(ii)

the heater or pump was not required to meet a provision like 3.12.5.4 when it was previously installed in the existing part of the building; and

(iii)

the heater or pump does not comply with 3.12.5.4, 3.12.5.6 or 3.12.5.7; and

(iv)

where the heater or pump serves the addition or extension through a hot water supply system, piping, or duct to which Part 3.12.5 applies, the portion of the system, piping or duct that is within, or mounted on or in association with, the addition or extension complies with that Part.

(c)

If the addition or extension is served by a heater or pump to which 3.12.5.4, 3.12.5.6 or 3.12.5.7 applies, the heater or pump must comply with those provisions unless—

(i)

the heater or pump served, and continues to serve, the existing part of the building; and

(ii)

the heater or pump was not required to meet a provision like 3.12.5.4 when it was previously installed in the existing part of the building; and

(iii)

the heater or pump does not comply with 3.12.5.4, 3.12.5.6 or 3.12.5.7; and

(iv)

where the heater or pump serves the addition or extension through a hot water supply system, piping, or duct to which Part 3.12.5 applies, the portion of the system, piping or duct that is within, or mounted on or in association with, the addition or extension complies with that part.

Explanatory information

Explanatory Information

Example for ACT 7.1.6.

A house has a existing evaporative air-conditioner, ducted gas central space heater, electric resistance storage water heater, and electric lighting. The house is to be extended by adding a new bedroom with ensuite bathroom, and a small section of hallway. The extension must comply fully with Part 3.12.5, except that the following approach to the use of concessions under ACT 7 could apply.

A new duct will be run from the nearest existing air-conditioner duct to an outlet in the new bedroom. When the existing air-conditioner was installed in 2003 it was not required to have a self-closing damper or the like, and it does not have one. Such a damper or the like does not need to be provided as otherwise required by 3.12.3.6, because of ACT 7.1.5(b). The new outlet in the bedroom will be mounted in the ceiling. To comply with ACT 7.1.5(b), the new outlet of the air-conditioner duct will have an outlet register with manually closable baffle that is actuated by turning a knob on the register outlet while standing on a step ladder. When the space heating is operating, heat loss from hot air rising up through the register and out to the atmosphere through the air-conditioner can be reduced by closing the register baffle. The extent of the new duct that is contained within the extension will have to comply with 3.12.5.3, which is about insulation and sealing of heating and cooling ducts. That will reduce efficiency losses as cooled air travels along the new duct.

The new ensuite's shower and hand basin will be serviced with hot water from new piping connected to the nearest existing hot water piping from the existing water heater. ACT 7.1.6 permits the existing water heater to be used to serve the extension even if the water heater fails to comply with 3.12.5.6, which is about energy source of water heaters and other matters. However, the portions of the new piping that are within the extension must comply with 3.12.5.1(a), which covers insulation of piping. That will reduce efficiency losses from hot water in the pipe losing heat.

Artificial lighting of a new hallway will rely on light from an existing light fitting located in the existing part of the house. Because of ACT 7.1.6(b), artificial lighting of the new hallway does not have to comply with 3.12.5.5, which includes limitations of the power density of lamps or illumination. However, new artificial lights in the form of electric light fittings in the new bedroom and new en-suit must comply with 3.12.5.5 insofar as it applies to the new extension, other than the new hallway.