Studies on energy efficiency in tertiary sector buildings and installations (public and private) as well as in industries. Indicatively, the following results are presented.

OFFICE BUILDING (42.617m2)	Simple Payback (years)
Radical renovation	>5
Free cooling	1,9
Replacement of network and air conditioning terminals	5,7
Installation of automation and control system	1,4
Heat recovery from HVAC Unit	5,3
Cooling system	0,85

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MUNICIPAL WATER AND SEWAGE SERVICE COMPANY	Simple Payback (years)
Optimal energy management of Group C pumps	0
Pumping operation during lower tariff periods	0
Power factor correction	0,33
Pumping station bypass for filling the distribution tank from group A and B pumps	0,17

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FOOD INDUSTRY	Simple Payback (years)
Heat recovery from boiler exhaust gases Heat recovery from oil heater exhaust gases Heat recovery from steam used by washing machines Heat recovery from compressors and condensers		4,3
Retrofitting of heating oil network		1,1

Appropriate software and measuring equipment are used for energy audits and studies.