England · Statutory guidance
Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings
Building regulation guidance on energy efficiency and the conservation of fuel and power.
- Edition
- 2021 edition incorporating 2023 amendments · Volume 1; later editions and transitions on source page
- Search coverage
- 104 of 104 PDF pages · 3 OCR pages
Energy & sustainability
Open original PDF at page 1 Browse document sections 38
- Section 0: Introduction 1PDF page 7
- Section 3: Consideration of high-efficiency alternative systems 20PDF page 8
- Section 7: Air permeability and pressure testing 52PDF page 9
- Section 12: Consequential improvements 71PDF page 10
- Section 0: IntroductionPDF page 11
- 0.3 The guidance in Approved Document L, Volume 1 applies to dwellings only.PDF page 12
- 0.21 This approved document, Approved Document L, Volume 1, provides guidance on insulation thatPDF page 15
- Section 2 of this approved document sets out how to produce these calculations.PDF page 19
- Section 1: Calculating the target primaryPDF page 20
- Section 2: Calculating the dwelling primaryPDF page 23
- 2.6 Buildings that contain more than one dwelling must comply with one of the following.PDF page 24
- 2.12 When calculating the dwelling primary energy rate and dwelling emission rate for a dwellingPDF page 26
- Section 3: Consideration of high-efficiencyPDF page 30
- Section 4: Limiting heat gains and lossesPDF page 33
- 4.13 If achieving the U-value in Table 4.3, column (b) either:PDF page 36
- 4.15 To ensure continuity of insulation in new dwellings, all of the following apply.PDF page 37
- 4.17 To limit thermal bridging in new dwellings, all of the following apply.PDF page 38
- 4.21 To ensure airtightness in new dwellings, all of the following apply.PDF page 40
- 4.24 In a new system, all of the following new pipework should be insulated.PDF page 41
- 4.27 Pipework for district heat networks should be insulated to meet either of the following.PDF page 42
- Section 5: Minimum building servicesPDF page 45
- Section 6 of this guidance.PDF page 46
- 5.21 It may be justified to control a heating zone rather than individual rooms in either of thePDF page 48
- Section 6: System specific guidancePDF page 49
- 6.12 For electric storage heaters, both of the following should be met.PDF page 53
- 6.22 New district heat networks or community heating systems should meet both of the following.PDF page 55
- 6.28 New underfloor heating systems should meet all of the following, in addition to the generalPDF page 56
- 6.36 Electrically driven air-to-air heat pumps with an output of 12kW or less should follow thePDF page 57
- 6.46 For a heat exchanger between a solar primary and secondary system, a minimum of 0.1m2 orPDF page 58
- 6.51 Comfort cooling systems should have both of the following controls.PDF page 59
- Section 7: Air permeability and pressurePDF page 62
- Section 8: CommissioningPDF page 65
- Section 9: Providing informationPDF page 68
- 9.5 For new dwellings, the operating and maintenance instructions should include a Home UserPDF page 69
- Section 10: New elements in existing dwellings,PDF page 71
- 10.7 When a dwelling is extended, elements should satisfy all of the following.PDF page 72
- Section 11: Work to elements in existingPDF page 77
- Section 12: Consequential improvementsPDF page 81
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
Conservation of L
fuel and power
APPROVED DOCUMENT
Volume 1: Dwellings
Requirement L1: Conservation of fuel and power
Requirement L2: On-site generation of electricity
Regulations: 6, 22, 23, 24, 25, 25A, 25B, 26, 26A, 26C,
27, 27A, 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.