5.4.3-1
Hot water distribution
Component Information
- Code:
- 5.4.3-1
- Sequence:
- 1
- Unit:
- nr/m2
- Sub-Element:
- 5.4.3 - 3 Hot water distribution
Hot water distribution
details, including the number of draw-off points (nr), to be stated.
Component Statistics
Measurement Rules
Included Items
Excluded Items
Measurement Rules (6)
Where components are to be enumerated, the number of components is to be stated.
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.
Installations for residential units, hotel rooms, student accommodation units, etc. may be enumerated (nr). The type of residential unit or room, and size (by number of bedrooms) of unit, is to be stated.
Work to existing buildings is to be described and identified separately.
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.
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 (17)
Hot water distribution pipelines to sanitary appliances, sinks, equipment, etc. including fittings.
Valves.
Water-saving devices.
Taps, where not part of a sanitary appliance or service equipment.
Pumps (i.e. secondary hot water circulation pumps).
Heat exchangers (including coil type, reheaters and water-to-water plate heat exchangers).
Storage cylinders and calorifiers.
Trace heating and frost-protection devices.
Hot water storage vessels and expansion vessels (including domestic hot water system (DHWS) calorifiers, hot water system (HWS) cylinders, unvented hot water systems and hot water calorifiers incorporating load levellers).
Immersion heaters.
Insulated combination units, with own feed and expansion tank.
Water softeners (including ion exchange plant (commercial and domestic), magnetic water conditioners and reverse osmosis plant).
Instrumentation and control components for hot water distribution systems (including temperature measurement sensors).
Thermal insulation.
Sundry items.
Testing and commissioning.
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 (6)
Boilers or other heat sources (included in sub-element 5.5.1).
Distribution pipelines that distribute hot water from the heat source to heat emitters (included in element 5.6, as appropriate).
Taps for sanitary appliances and domestic kitchen sinks (included in sub-elements 5.1.1 or 4.1.2, as appropriate).
Taps and valves for service equipment (included in sub-element 5.2.1).
Building management systems and other control systems (included in sub-element 5.12.3).
Builder’s work in connection with services (included in element 5.14).
Navigation
Export
API Access
Access this component data programmatically:
GET /api/components/5.4.3/1/- Complete component details