Environmental Engineering Reference
In-Depth Information
Based on these considerations and being the use of mechanical ventilation
systems with heat recovery not usually installed in common residential houses, an
improved energy performance of the building can be reached employing thermal
transmittance values that are lesser than those indicated in the Italian Legislative
Decree n. 311/2006.
The measures of energy efficiency in the building sector can hardly be stan-
dardized since they are strongly connected to elements such as the type of enve-
lope, the orientation and the technical plants features. In the aim of identifying an
optimal situation for comfort, both during winter and summer, it is required to
simulate the proposed measures through suitable software tools set able to
reproduce the above outlined conditions, in order to identify the set of more
profitable actions in terms of energy and costs savings.
Based on what was said before within the Guidelines the local administrations
can find some indications about the improvement measures to be included into the
energy annex of the new municipal building regulation. In this way, even if the
indicated measures will not allow attaining Near Zero Energy Buildings, they will
certainly contribute to reaching this goal for all buildings typologies.
The article 9 of the guidelines is thus completed, in its mandatory features
reported in the table above and desumed from the current legislative framework,
with some other paragraphs among which number 2, reported below. It refers to
improvements actions that can be implemented and proposed by the municipal
administrations:
2. In all cases referred to in paragraph 1 (above), in order to ensure greater
comfort conditions in both winter and summer and a consequent saving in
terms of primary energy for heating and cooling in buildings, those actions
referred to in paragraph 1 of this Article (art. 9 Thermal insulation of build-
ings) will be awarded if they provide for the vertical opaque structures, a
thermal transmittance values (U) improvement from 40 to 70 % as compared to
the limits set in the same paragraph, similarly to the roof.
The incentive will be as larger as larger is the percentage of improvement. The
quantification of the improvement actions and the incentive policy must be
defined
when
the
new
municipal
building
code
is
issued
by
the
local
administration.
As previously mentioned in
Sect. 5.3
the implementation of BAC systems in
buildings is one of the actions that can be implemented, in the design phase of new
buildings or in the energetic requalification of existing buildings, in order to
improve their energy performance.
In the following chapter, a study showing the effectiveness of the automation of
technical systems in buildings of different energy efficiency classes is presented.
The results show that these systems can be included among the measures
leading to greater energy efficiency in buildings (especially in buildings with low
initial performance, which often the case of the buildings in the Sicilian Region).
Therefore, such as the passive measures acting on the building envelope, they can
be regarded as tools to improve energy efficiency and to be fully integrated into the
municipal building code.
