Central Heating Systems and the UK Building Regulations
The document discusses key parts of the UK Building Regulations related to central heating systems, including:
1) Part L which covers the seasonal efficiency of domestic boilers and the SEDBUK (Seasonal Efficiency of Domestic Boilers in the UK) rating system which provides a basis for comparing boiler efficiency.
2) The SAP (Standard Assessment Procedure) which is important for heating design and sets targets for new homes' CO2 emissions.
3) How the SEDBUK rating system calculates boiler efficiency based on standard lab tests and factors like boiler type, fuel used, and typical UK climate and usage patterns.
2.
Part L1 to the Building
Regulations
Seasonal Efficiency of Domestic Boilers in the UK (SEDBUK)
• SEDBUK was developed under the Government's Energy
Efficiency Best Practice Programme with the co-operation of
boiler manufacturers.
• SEDBUK provides a basis for fair comparison of the energy
performance of different boilers.
3.
Standard Assessment
Procedure (SAP)
The SAP procedure forms a very important part of heating design.
It also produces:
• a TER (Target CO2 Emission Rate) for new houses to
achieve
• a DER (Dwelling CO2 Emission Rate), as built.
The building Regulations specify that the DER must be as
good as, if not better than the original TER.
4.
SEDBUK rating system
The rating system uses important factors for its calculations.
The system uses the results of standard laboratory tests,
together with other important factors, such as:
• boiler type
• ignition arrangement
• internal store size
• fuel used
• knowledge of the UK climate
• typical domestic usage patterns.
5.
SEDBUK in practice (1)
Dwellings with a total
usable floor area up to
150m2 should be divided
into at least two space
heating zones with
independent temperature
control, one of which has
to be in the living room.
6.
SEDBUK in practice (2)
Sub-zoning is not
appropriate for single-
storey open-plan
dwellings in which the
living area is greater
than 70% of the total
floor area.
