ONLINE BRUSSELS HERITAGE - ONE-DAY SEMINAR - 11/12/2014

FINANCIAL IMPACT OF ENERGY EFFICIENCY MEASURES IN LE LOGIS AND FLORÉAL

JONATHAN FRONHOFFS
BUREAU CENERGIECVBA

TWO HOUSES IN THE GARDEN CITYLE LOGIS AND FLORÉAL WERE EXAMINED. THE GATHERED DATA WERE EXTRAPOLATED AND A MODEL CREATED WHICH CAN BE APPLIED TO OTHER BUILDINGS IN THE GARDEN CITY. A HIERARCHY OF INTERVENTIONS WAS DRAWN UP IN RELATION TO THEIR IMPACT ON ENERGY CONSUMPTION AND RETURN ON INVESTMENT TIME.

In the course of this study two buildings were audited: a three-façade building on Kruisbooglaan and a two-façade building on Ibissenstraat. They were examined in order to extrapolate energy saving measures for the entire garden city at a later time. The measures of course fit into the management plan; a link is made between the audit and the management plan. For example, the course of the ventilation tube is clearly marked, through the roof or through the side façades, in particular colours.

Firstly, all losses through the building shell and the characteristics of each building were analysed (fig. 1 and 2).

The roof of the Ibissenstraat building was not insulated and 75% of the energy loss was found to take place through the roof. The opposite is true for the Kruisbooglaan: the roof was insulated and we ascertained that a large portion of the losses occurred through the façades. This is a three-façade building so it is logical that a higher

Fig . 1

Ibissenstraat 5 in Watermaal-Bosvoorde (A. de Ville de Goyet, 2015 © GOB).

Fig . 2

Kruisbooglaan 34 in Watermaal- Bosvoorde (A. de Ville de Goyet, 2015 © GOB).

Fig. 3

Buildings studied (© Cenergie).

36 | Financial impact of energy efficiency measures in Le Logis and Floréal