Part L on Conservation of Fuel and Power The criteria for limiting heat (cf. Criterion 3 and the BRUKL method) used in Approved Document L2A (AD L2A), 2013 edition, sets out an approach to limiting heat gains in buildings as required by paragraph L1(a)(i) of Schedule 1 to the Building Regulations. The intention is to limit solar gains during the summer period to either remove or reduce the need for air conditioning or lower the installed capacity of any air conditioning system, while ensuring that internal conditions are appropriate for the tasks being carried out. Although AD L2A only requires that gains are limited to notional values, AD L2A recognises that for naturally ventilated buildings, limiting solar gain is not always enough to provide a satisfactory level of comfort and advises: the developer should work with the design team to “Therefore specify what constitutes an acceptable indoor environment in the particular case, and out the necessary design assessments to develop solutions that meet the agreed brief”. Criterion 3 and the BRUKL method are designed to limit solar gains and may not prevent summertime overheating. The method detailed in section 7.6 of this document should be used to assess summertime overheating. The design should consider energy usage. It should minimise the need for space heating in winter as well as reduce the need for summer cooling. Paragraph L1 (a) (ii) of Schedule 1 to the Building Regulations requires provision to be made to limit heat losses from pipes, ducts and vessels used in building services. The Non-Domestic Building Services Compliance provides detailed guidance in support of AD L. It includes guidance on heating and ventilation system performance and on insulating pipework and ductwork. Part C on Site Preparation, Contaminants, Moisture, Part C on site preparation and resistance to contaminants and moisture (including Radon) of the Building Regulations applies to all buildings including schools. Requirement C1 of Schedule 1 to the Building Regulations 2010, states: (2) Reasonable precautions shall be taken to avoid danger to health and safety “… caused by contaminants on or in the ground covered or to be covered by the building and any land associated with the building.”
Part L on Conservation of Fuel and Power The criteria for limiting heat (cf. Criterion 3 and the BRUKL method) used in Approved Document L2A (AD L2A), 2013 edition, sets out an approach to limiting heat gains in buildings as required by paragraph L1(a)(i) of Schedule 1 to the Building Regulations. The intention is to limit solar gains during the summer period to either remove or reduce the need for air conditioning or lower the installed capacity of any air conditioning system, while ensuring that internal conditions are appropriate for the tasks being carried out. Although AD L2A only requires that gains are limited to notional values, AD L2A recognises that for naturally ventilated buildings, limiting solar gain is not always enough to provide a satisfactory level of comfort and advises: “Therefore the developer should work with the design team to specify what constitutes an acceptable indoor environment in the particular case, and out the necessary design assessments to develop solutions that meet the agreed brief”. Criterion 3 and the BRUKL method are designed to limit solar gains and may not prevent summertime overheating. The method detailed in section 7.6 of this document should be used to assess summertime overheating. The design should consider energy usage. It should minimise the need for space heating in winter as well as reduce the need for summer cooling. Paragraph L1 (a) (ii) of Schedule 1 to the Building Regulations requires provision to be made to limit heat losses from pipes, ducts and vessels used in building services. The Non-Domestic Building Services Compliance provides detailed guidance in support of AD L. It includes guidance on heating and ventilation system performance and on insulating pipework and ductwork. Part C on Site Preparation, Contaminants, Moisture, Part C on site preparation and resistance to contaminants and moisture (including Radon) of the Building Regulations applies to all buildings including schools. Requirement C1 of Schedule 1 to the Building Regulations 2010, states: “… (2) Reasonable precautions shall be taken to avoid danger to health and safety caused by contaminants on or in the ground covered or to be covered by the building and any land associated with the building.”