Project Case Studies

Insulation: a key element of refurbishment

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Whilst refurbishing their house, one householder was keen to optimise energy efficiency within the building and therefore was keen to be involved in the project. The house, typical of those in Heidelberg, had an annual gas consumption of 35,000 kWh before the audit. The audit showed heat loss areas in the building primarily to be the outer walls (32%) and the roof (17%). Some heat was also being lost through the windows (9%) and through the cellar (5%). After advice from KliBA, the householder installed 22cm of roof insulation and 16cm of wall insulation; saving a total of 17,000 kWh and 3.6 tCO2 annually. Other insulation and draught proofing measures will be installed over the coming months, reducing the overall energy consumption by 68%. KliBA helped the household to obtain subsidies from the City Administration and a special loan programme. These grants have reduced the initial cost of measures, meaning that these costs will be paid back through savings in fuel bills in only eight years.

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