ENE 01 - Improvement in Energy Efficiency Rating

Converting a non-habitable room into a habitable room - KBCN1327

If the refurbishment project involves a room, for example a garage, being converted into a habitable room, the pre-refurbishment SAP assessment needs to include this space in the total floor area. The energy assessment of this space will need to be based on the default values in SAP Appendix S or actual values where available.

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SAP box number for the energy efficiency rating (EER) - KBCN1325

The energy efficiency rating (EER) should be taken from box number 258 under section 11a. If the dwellings you are assessing are supplied by community scale CHP please use SAP Box 358 under section 11b

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SAP box number if community scale CHP is used - KBCN0274

If the dwellings you are assessing are supplied by community scale CHP please use SAP Box 358 under section 11b CHP information is in a separate section of the SAP worksheet

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Using different SAP versions (Full SAP or RdSAP) for pre and post-refurbishment - KBCN0202

You may use either Full SAP or RdSAP to calculate the energy efficiency rating. We allow both versions of SAP for flexibility and to help keep costs down, but we recommend that you use Full SAP both before and after refurbishment as this will give a more accurate result.

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