For offices, the energy assessment process consists in understanding the systems, structure and consumption data, followed by the identification of technical solutions, all completed by the cost-benefit analysis that will formally define intervention priorities.
In 2013, the assets analysed were the 4th and 3rd office buildings and FUP (an area where meetings and events are held). The collection of documents and the carrying out of inspections lays the foundation for the preparation of the energy models for the various buildings and their comparison with documented actual consumption by evaluating the appropriate adjustments necessary to adapt the stationary model generated by software with the real pattern of use. The study of the energy behaviour of the buildings is used to obtain a series of proposals for actions mainly aimed at the reduction of energy consumption, which results in a reduction of emissions of greenhouse gases into the atmosphere, raising both indoor well-being and air quality.
The improvement measures identified can be divided into two categories: measures relating to the building envelope and improvements to be borne by technological systems.
The first set of works to be carried out on the building envelope also includes specific actions for improvements to window frames, improvements to the thermal insulation of covers and thermal tripping on opaque vertical surfaces.
The measures proposed concerning the technological systems are:
- improvements to the production of the heat carrier
- improvements to the distribution networks
- improvements to the air handling unit
- improvements to emissions terminals
- improvements to the lighting system and creation of a monitoring system.
Each measure proposed is further explored through a feasibility study that covers the following points:
- description of the works (also taken from technical data sheets)
- cost of works
- annual saving in energy terms
- return times
The discussion phase with management to define a plan of action based on these energy assessments is still ongoing. Priorities will take into account several factors including available investments, return times and the potential benefit in terms of energy and environmental comfort.