Energy Saving Case Study 13
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House Age: Modern (1970 - Now)
Energy Saving Improvement 1
Energy Saving Improvement 2
Energy Saving Improvement 3
Energy Saving Improvements Details
This is a 2 bedroom detached bungalow built in 1992. It has brick cavity walls with double glazed windows and a pitched roof. It also has a conservatory which is separated from the living room by an external quality double glazed door. It's located on the edge of a small village but does have the benefit of a mains gas supply.
In its original condition the house would have scored SAP55 in EPC band D and is estimated to have required 301kWh/m2 of gas for heating and hot water, producing 4.1 tonnes CO2.
In 2012, the loft and cavity walls were insulated free under the CESP energy supplier subsidised scheme. This included carbon beads being injected into the cavity through drill holes in the external wall (although some found their way into the electricity meter box). This had the effect of reducing the heating requirement by a further 5% for an already fairy efficient bungalow.
The addition of more loft insulation so that it now reached 300mm thickness resulted in another reduction in the heating load by 6% and saving 0.4 tonnes CO2.
In 2013 the owners agreed to be part of a pilot programme run through the County Council which offered a free replacement condensing combination boiler since their previous one was over 20 years old. This made the most significant energy saving of all by bringing the total saving up to 30% based on the EPC assessment.
This indicates that even a fairly modern building can achieve significant savings with a few improvement measures. The bungalow now achieves an energy efficiency rating of SAP66 with a combined heating and hot water energy cost now estimated to be no more than £586 each year. The annual environmental impact of the property has reduced by 30% from 4.1 to 2.9 tonnes CO2.