Open Access
Table A3
Summary of the most important maintenance costs and intervals.
| Position | Activity | Interval | Today's costs (net) | Unit |
|---|---|---|---|---|
| Exterior wall | Maintenance | Annually | 1.5% of Invest | €/a |
| Floor construction | Maintenance | Annually | 1.5% of Invest | €/a |
| Flat roof construction | Maintenance | Annually | 1.5% of Invest | €/a |
| Windows and doors | Maintenance | Annually | 1.5% of Invest | €/a |
| Ventilation system with heat recovery | Maintenance | Annually | 4.0% of Invest | €/a |
| Air distribution system | Cleaning and maintenance | Annually | 6.0% of Invest | €/a |
| District heating transfer station | Maintenance | Annually | 3.0% of Invest | €/a |
| Ground source heat pump | Maintenance | Annually | 3.0% of Invest | €/a |
| Air heat pump | Maintenance | Annually | 3.0% of Invest | €/a |
| Thermal collectors | Maintenance | Annually | 1.0% of Invest | €/a |
| PV system | Maintenance | Annually | 1.0% of Invest | €/a |
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