Implementation of forced ventilation system with waste heat recovery

Implementation of forced ventilation system with waste heat recovery
© tl6781, image #95658625, 2017, source:
Energy, Carbon
All sectors, Construction
High cost
Annual saving:
15 - 25 %
Payback time:
2 - 20 Year(s)
Resource savings: Energy:
Typical savings of energy after implementation of the measure are 20 %. Investment costs are about 350 € per 1 GJ of energy savings. (Depending on company size and type, it varies between 15,000 – 150,000 €.)
Associated cost savings: Energy:
15 - 25%
Payback time:
Typical payback time is about 2-10 years in industry, and about 20 years in service, household and public sectors.
Total cost savings:
Typically, energy savings of about 20 % are achieved by implementation of the measure. Regarding initial investment, capital intensity varies with the type of building (residential prefabricated houses, buildings in heritage zones, building facilities). However, projects with the same type of buildings are similar and comparable. Typical investment costs on energy saving are 350 € / GJ.
Premises and operation areas:
Office building, Production building
Size of company:
Micro (less than 10), Small (less than 50), Medium (less than 250)
Advancement in applying resource efficiency measures:
Beginner, Intermediate
One off investment:
15000 - 300000€
What is in it for you:
Lower heating-related expenses and vastly improved indoor environment
Descriptive information:

Many production processes generate heat that escapes out windows or other openings in the building. That is a waste, especially when it can be used to preheat incoming air, water or other media as part of the building’s overall ventilation system.  

Recovering waste heat like this, companies save energy and cut operating and administrative costs at the same time.

It is increasingly common to use waste heat from ventilation systems in buildings (offices, public administration, industry). Forced ventilation systems ensure sufficient fresh air is circulated throughout the building, reduce humidity and mildew, filter incoming air, close out exterior noise pollution, and help to cap energy consumption and heating costs.

These bespoke systems are more often found in new or refurbished buildings, where ventilation-heat recovery is coupled with the air- conditioning system.

With changing standards and expectations on building energy performance (e.g. nearly-zero energy consumption, passive house), installation of forced ventilation systems has risen. The EU’s Energy Performance of Buildings Directive requires all new buildings to be nearly zero-energy by the end of 2020. All new public buildings must be nearly zero-energy by 2018.

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