To meet the needs of the residents, the administrator decided to intervene both on the building envelope, having the condominium equipped with a thermal coat and replacing the old window frames with low transmittance frames, and on the annual cycle air conditioning system, replacing the existing system with a complete Clivet system.

The existing radiators, fancoils, and internal regulation and metering system were maintained.
The Clivet system is based on :

• 6 ELFOEnergy Magnum WASN-XIN multi-purpose heat pumps of 80 kW each capable of producing hot and chilled water simultaneously
• 6 gas-fired 200 kW boilers
• 2 high temperature water-to-water heat pumps WSHH-LEE1 ELFOFoenrgy Ground Medium2 of 100 kW
• 3 x 2000 litre storage tanks for summer cooling 
• 2 x 2000 litre storage tanks for heating 
• 2 storage tanks of 2500 litres for domestic hot water, each equipped with 2 exchangers, which exchange respectively with the water-to-water heat pumps and the boilers, which only intervene in the event of greater demand
• 1 Clivet Intelliplant management system

The 6 multi-purpose heat pumps produce the hot water for the storage tanks, which act as a source to serve the high temperature heat pumps. 

During most of the year, when there is a similar demand for heating and cooling, they make it possible to exploit the high efficiency of producing chilled and hot water at the same time. 

Domestic hot water is produced by exploiting the hot water of the multifunction units  as a source, thus not using groundwater or well water, which would have a less favourable temperature and would result in a more expensive system. 

Taking advantage of the multifunctional technology, combined with high temperature heat pumps, it is also possible to produce domestic hot water at temperatures above 65°C without using a boiler. 

The system is completed with 6 boilers, which can work in integration in the case of high heating demands, or in total replacement in the case of heat pump failure or maintenance. 

The entire annual cycle air-conditioning system is managed by the Clivet Intelliplant supervision system, which coordinates the entire thermo-cooling plant, enabling the central resources according to the requests received from the individual flats and always activating the most efficient resource, favouring the use of heat pumps. Thanks to the Intelliplant supervision system, it is possible to run heat pumps in conjunction with boilers, thus providing a perfectly reliable and efficient hybrid system for every eventuality. Intelliplant also allows the total efficiency of the system to be maximised by running the units at their maximum efficiency and also allows the customer to monitor thermal, cooling and electrical consumption.