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Checklist

Download Editable version of L1A checklist (Microsoft Word Document 159 Kb)

No.

Check

Evidence

Produced by

 1     Criterion 1 - Predicted carbon dioxide emission from proposed dwelling does not exceed the target

1.1

TER (kg CO2/m2.a)

Standard output from SAP calculation

Authorised SAP Assessor
Energy Check Limited

1.2

DER for dwelling as designed (kg CO2/m2.a)

Standard output from SAP calculation

Authorised SAP Assessor
Energy Check Limited

1.3

Are emissions from dwelling as designed/as built less than or equal to the target?

Compare TER and DER

Authorised SAP Assessor
Energy Check Limited

2     Criterion 2 - The performance of the building fabric and the heating, hot water and fixed lighting    systems should be no worse than the design limits

 

Fabric U-values

2.1

Are all U-values better than the design limits in Table 2?

Schedule of U-values produced as standard output from SAP

Authorised SAP Assessor
Energy Check Limited

 

Common areas in buildings with multiple dwellings (where relevant)

2.2

If the common areas are unheated, are all U-values better than the limits in Table 2? (If heated, use L2A)

Schedule of U-values produced as standard output from SAP

Authorised SAP Assessor
Energy Check Limited

 

Heating and hot water systems

2.3

Does the efficiency of the heating systems meet the minimum value set out in the Domestic Heating Compliance Guide?

Schedule of appliance efficiencies as standard output from SAP

Authorised SAP Assessor
Energy Check Limited

2.4

Does the insulation of the hot water cylinder meet the standards set out in the Domestic Heating Compliance Guide?

Cylinder specification as output from SAP

Authorised SAP Assessor
Energy Check Limited

2.5

Do controls meet the minimum controls provision set out in the Domestic Heating Compliance Guide?

Controls specification as output from SAP

Authorised SAP Assessor
Energy Check Limited

2.6

Does the heating and hot water system meet the other minimum provisions in the Domestic Heating Compliance Guide?

Schedule of compliance provisions

 

 

Fixed internal and external lighting

2.7

Does fixed internal lighting comply with paragraphs 42 to 44?

Schedule of installed fixed internal lighting

Builder or Electrical contractor who could be a Part P Approved Competent Person

2.8

Does the external lighting comply with paragraph 45?

Schedule of installed external lighting

Builder or Electrical contractor who could be a Part P Approved Competent Person

 3     Criterion 3 - the dwelling has appropriate passive control measures to limit solar gains

3.1

Does the dwelling have a strong tendency to high summertime temperatures?

Prediction produced as standard output from SAP

Authorised SAP Assessor
Energy Check Limited

 4      Criterion 4 - the performance of the dwelling, as built, is consistent with the DER

4.1

Have the key features of the design been included (or bettered) in practice?

List of key features produced as standard output from SAP to facilitate sample checking by BCB and enable builder to control construction on site

Authorised SAP Assessor
Energy Check Limited

 

Fabric construction

4.2

Have accredited details been adopted?

Schedule of details used and their reference codes

Builder’s submission
Schedule provided by
Energy Check Limited

4.3

Have non-accredited details been adopted?

Evidence that details conform to standards set out in IP1/06 (Assessing the effects of thermal bridging at junctions and around openings)

Builder’s submission

4.4

Has satisfactory documentary evidence of site inspection checks been produced?

Completed pro-formas showing checklists have been completed

Builder’s submission
Pro-forma provided by
Energy Check Limited

4.5

Design air permeability (m3/h.m2) at 50Pa)

Standard output from SAP calculation (designer’s choice)

Authorised SAP Assessor
Energy Check Limited

18

Has evidence been provided that demonstrates that the design air permeability has been achieved satisfactorily (see paragraph 56)

Sample pressure test results in comparison to design value.

ATTMA member organisation or similar accredited tester
Energy Check Limited

 

Commissioning heating and hot water systems

4.7

Evidence that the heating and hot water systems have been commissioned satisfactorily

Commissioning completion certificate

Approved Part J or Part P Competent person

 5    Criterion 5 - the necessary provisions for energy-efficient operation of the dwelling are put in place

5.1

Has all the relevant information been provided?

1) Operating and maintenance instructions
2) Data for Energy Performance Certificate (SAP Rating)

Builder’s submission