SAPs and EPCs (Standard Assessment Procedure and Energy Performance Certificates)
Taking care with detail and strategy in all areas to ensure that dwellings are built for warmth and energy efficiency, the SAPs and EPCs can help compare the design with other similar buildings.
SAPs or Standard Assessment Procedure are used in to measure the energy usage and the estimated running (heating and hot water) costs of a dwelling annually. These costs are based on the size of the dwelling, how well insulated it is and the efficiency of the heating system.
SAP calculations involve the measuring of all thermal elements (or building fabric): wall, floor, roof, windows and taking account of the most frequently heated area of the house (usually the living room). Increasing as Building Regulations standards tighten this includes measuring and calculating thermal bridging areas (the joins within the thermal elements).
It also includes information on Air tightness, heating and hot water and any other mechanical services, which will all contribute to an overall rating of a dwelling.
There are usually three stages to the SAP, preliminary based on the building design usually to ensure that the dwelling can meet building regulations backstops, a Design stage model to show that the relevant targets are being met and that the design model reflects u values and building services that are used on construction drawings.
Energy Performance Certificates (EPCs)
The final As Built SAP calculation will be based on As Built drawings, Air Pressure certificate and a deflation from the developer that the dwelling is constructed as Designed. Once this has been completed from there an Energy Performance Certificate (EPC) can be generated.
SAP calculations provide a system of comparing the energy efficiency of different dwellings, the SAP ratings go from 1 to 100.
At M Sustainability, we are keen to ensure that all houses are as efficient as possible and constantly looking for new and innovative ways to improve the efficiency and thermal envelope and work to find a solution that will suit the development the strategy and considering all possible solutions.