The topics of the Jam session was promotion of energy efficiency measures in multiresidential buildings and incorporating the best possible solutions in ventilation when planning the energy efficient refurbishment of the houses.

 

The most important topic in energy efficiency in Latvia, where the most direct energy saving is possible, is energy efficiency measures in multiresidential buildings as 66% of the residents live in such houses, heat supply in residential sector is one of the biggest energy consumers, and after energy efficient refurbishment of such houses 50 – 60% of energy savings are normally achieved. The other important question when planning the refurbishment and improvement of wall insulation is ventilation as this has to be taken into consideration at the same time.

Therefore the topic of the Jam session was promotion of energy efficiency measures in multiresidential buildings and incorporating the best possible solutions in ventilation when planning the energy efficient refurbishment of the house.

About 30 people participated in the Jam session. Session started with introductory lectures of professor A.Lesinskis and Mg.sc ing. I.Dimdina from the Latvia Technical University and Latvia University of Agriculture, Faculty of Construction.

After the presentations, two groups of 15 people were formed. Red hot topics of the Jam session was:

1.Promotion of  the renovations of the multiresidential buildings

2. Recommended ventilation solutions when planning the renovation  

The discussion in smaller groups and brainstorming of the topics/problems/solutions lasted for an hour and half.  It was surprisingly enough, for instance, in the group discussing the promotion of renovations - that the thinking on what was the primary problem, shifted from the insufficient funding to insufficient information to make decision. As it was emphasized, the primary problem here is insufficient explaining work on how beneficial is the renovation, that the saved energy costs can cover large part of the investments for refurbishment.

Meanwhile in the ventilation group it was emphasized how important it was to provide sufficient ventilation as the tendency is to reduce the  renovation costs by minimising the ventilation part – later causing excess humidity in the apartments in some cases even asthma to its residents. As one of the most effective solutions here was proposed the national level TV programme with popular people explaining the need for sufficient ventilation and the possible technical solutions. As very convincing the CO2 meter was admitted – showing on how fast the CO2 concentration in the rooms exceed the norms in the premises with insufficient ventilation.  Also individual ventilation solutions were proposed, combination of plastic and wooden windows, as well as, suggestion on stricter building norms in the ventilation area.  

At the conclusion part the moderators of the groups presented the identified problems and possible solutions to all the participants. Everyone agreed that this has been a valuable sharing of ideas as engineers and house maintenance specialists from different municipalities were involved as well as expertise of professors and Estonian experience.