5.7.1-1

Central ventilation systems

Unit: m2 Sub-Element: 5.7.1 - 1 Central ventilation
Component Information
Code:
5.7.1-1
Sequence:
1
Unit:
m2
Sub-Element:
5.7.1 - 1 Central ventilation
Description:

Central ventilation systems

Details to State:

details to be stated.

Component Statistics
5
Measurement Rules
14
Included Items
3
Excluded Items
Measurement Rules (5)
C1 1

The area measured is the area serviced by the system (i.e. the area of the rooms and circulation spaces that are served by the system, which is not necessarily the total GIFA of the building). The area serviced is measured using the GIFA.

C2 2

Where more than one system is employed, the area measured for each system is the area serviced by the system.

C3 3

Work to existing buildings is to be described and identified separately.

C4 4

Where the contractor is only responsible for designing specific elements and/or components of the building project (i.e. not the entire building project), contractor-designed work is to be described and identified separately.

C5 5

The percentage additions for testing and commissioning are to be applied to the total cost of the items comprising the sub-element. A single combined percentage addition can be applied to cover the costs of both testing and commissioning.

Included Items (14)
1.

Air extraction systems.

2.

Air supply (ventilators) and extraction systems.

3.

Extraction units/terminal units.

4.

Fan units.

5.

Distribution ductwork and ductwork fittings and ancillaries, e.g. supports, hangers, access openings and dampers (control, fire and smoke).

6.

Grilles, fans, filters and other ancillary components of central ventilation systems.

7.

Distribution pipelines and pipeline fittings.

8.

Valves.

9.

Pumps.

10.

Vibration isolation mountings.

11.

Instrumentation and control components for central ventilation systems.

12.

Sundry items.

13.

Testing and commissioning.

14.

Where works are to be carried out by a subcontractor, the subcontractor’s preliminaries, design fees, risk allowance, overheads and profit, with allowance for these to be made within unit rate applied to element or component.

Excluded Items (3)
1. Ref: 5.8.2

General-purpose LVLV power supplies (included in sub-element 5.8.2).

2. Ref: 5.12.3

Building management systems and other control systems (included in sub-element 5.12.3).

3. Ref: 5.14

Builder’s work in connection with services (included in element 5.14).

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