PartL 2013: Results tab

Contains the resulted reports derived from PartL 2013 calculations. The program checks criteria for PartL2A compliance. All checks need to be satisfied before overall compliance is achieved. Actual compliance with PartL2A involves further criteria such as ensuring the building is constructed consistent with BER and operated in an energy efficient manner. These additional criteria are outside the scope of this calculation program.

Setting	Description
England Building Regulations Part L 2013	A Building rating document is automatically produced and this document is displayed. The document provides access to various key calculation results including the following. The energy used per square meter (kWh/m2) by the actual and notional buildings for heating, cooling, auxiliary energy uses (pumps and fans), lighting and domestic hot water. The resulting CO2 emissions (kgCO2/m2) from the actual and notional buildings.
CO2 emissions mandatory requirement	Carbon dioxide emissions for the actual building (BER) is computed by SBEM. A notional building is automatically constructed using the actual building data and limiting U values and glazed areas, as defined in PartL. The carbon dioxide emission for the notional building is computed by SBEM. Two factors, the Improvement factor and the LZC factor are computed by SBEM and applied to the notional building emission to give a target emission rate (TER). The computed building emission rate (BER) must be less than or equal to the Target emission rate (TER) for CO2 emission compliance. U values (see compliance document) – a check is made by SBEM to see if the fabric U values specified for the project are within the limiting U values in PartL Table 4, for both individual element U values and area-weighted average U values. Solar gains - (see compliance document) - a calculation is carried out for each room, to check if the solar and internal casual gains (people, lighting and equipment), averaged over the period of daily occupancy, does not exceed 35 W/m2. Solar irradiances for July in table 2.24 (CIBSE A 1999) are used for this check.

Setting

Description

England Building Regulations Part L 2013

A Building rating document is automatically produced and this document is displayed. The document provides access to various key calculation results including the following.

The energy used per square meter (kWh/m2) by the actual and notional buildings for heating, cooling, auxiliary energy uses (pumps and fans), lighting and domestic hot water.
The resulting CO2 emissions (kgCO2/m2) from the actual and notional buildings.

CO2 emissions mandatory requirement

Carbon dioxide emissions for the actual building (BER) is computed by SBEM. A notional building is automatically constructed using the actual building data and limiting U values and glazed areas, as defined in PartL. The carbon dioxide emission for the notional building is computed by SBEM. Two factors, the Improvement factor and the LZC factor are computed by SBEM and applied to the notional building emission to give a target emission rate (TER). The computed building emission rate (BER) must be less than or equal to the Target emission rate (TER) for CO2 emission compliance.

U values (see compliance document) – a check is made by SBEM to see if the fabric U values specified for the project are within the limiting U values in PartL Table 4, for both individual element U values and area-weighted average U values.

Solar gains - (see compliance document) - a calculation is carried out for each room, to check if the solar and internal casual gains (people, lighting and equipment), averaged over the period of daily occupancy, does not exceed 35 W/m2. Solar irradiances for July in table 2.24 (CIBSE A 1999) are used for this check.