England · Statutory guidance
Conservation of fuel and power: Approved Document L, Volume 2 — Buildings other than dwellings
Energy performance guidance for non-domestic buildings, covering fabric, services, controls and commissioning.
- Edition
- 2021 edition incorporating 2023 amendments · Volume 2; later editions and transitions on source page
- Search coverage
- 116 of 116 PDF pages · 2 OCR pages
Energy & sustainability
Open original PDF at page 1 Browse document sections 35
- Section 0: Introduction 1PDF page 7
- Section 4: Limiting heat gains and losses 23PDF page 8
- Section 7: Air permeability and pressure testing 57PDF page 9
- Section 12: Consequential improvements 82PDF page 10
- Section 0: IntroductionPDF page 11
- 0.10 Guidance for existing buildings is given in this approved document for the following.PDF page 13
- 0.23 The approved documents set out what, in ordinary circumstances, may be accepted as one wayPDF page 15
- Section 1: Calculating the target primaryPDF page 19
- Section 2: Calculating the building primaryPDF page 20
- 2.7 If thermal energy is supplied from a district heat network or community heating system orPDF page 21
- Section 3: Consideration of high-efficiencyPDF page 30
- Section 4: Limiting heat gains and lossesPDF page 33
- 4.6 If windows or fully glazed pedestrian doors cannot meet the requirements of Table 4.1 in anPDF page 34
- 4.7 Existing elements that are being renovated should meet the limiting standards in Table 4.2.PDF page 36
- 5.14 to 5.16PDF page 44
- Section 5: Minimum building servicesPDF page 45
- 5.11 Heating systems should have all the following controls.PDF page 47
- Section 6: System specific guidancePDF page 49
- 6.7 Boiler systems with an output of more than 100kW should have both of the following.PDF page 52
- 6.19 Electric fan convectors should have switching to control both of the following.PDF page 54
- 6.26 Domestic hot water systems should have both of the following.PDF page 56
- 6.34 The specification of comfort cooling systems should be based on an appropriate heat gainPDF page 57
- 6.36 The value of the seasonal energy efficiency ratio (SEER) and the seasonal coefficient ofPDF page 58
- 6.40 For absorption chillers used in conjunction with on-site CHP or a district heat network orPDF page 59
- 6.53 Mechanical ventilation systems should have all of the following.PDF page 62
- 6.60 Lighting should observe the following.PDF page 63
- Section 7: Air permeability and pressurePDF page 67
- Section 8: CommissioningPDF page 71
- 8.7 A commissioning notice must be given to the relevant building control body and the buildingPDF page 72
- Section 9: Providing informationPDF page 75
- Section 10: New elements in existing buildings,PDF page 80
- 10.11 should be met.PDF page 81
- Section 11: Work to fabric elements in existingPDF page 87
- Section 12: Consequential improvementsPDF page 92
- Section 10 if they have U-values higher than:PDF page 106
Source wording and page order preserved. Drawings and table layouts remain available in the original PDF.
O N L I N E V E R S I O N
The Building Regulations 2010
L
Conservation of
fuel and power
APPROVED DOCUMENT
Volume 2: Buildings other than dwellings
Requirement L1: Conservation of fuel and power
Requirement L2: On-site generation of electricity
Regulations: 6, 22, 23, 24, 25, 25A, 25B, 26, 26C, 27, 27C,
28, 40, 40A, 43, 44 and 44ZA
2021 edition incorporating 2023 amendments –
for use in England
O N L I N E V E R S I O N
Edition and local adoption determine which requirements apply. Use the publisher’s document for the complete clauses, diagrams and amendments.