The advantages of decentralised ventilation
Ventilation with closed windows
Why is domestic ventilation becoming increasingly important?
In addition to removing humidity to protect the building, the health aspect of ventilation is becoming increasingly important. The extracted, polluted indoor air is replaced by virtually virus-free outdoor air - the energy contained in the exhaust air is largely transferred to the supply air by heat exchangers.
This also includes how to achieve a good indoor climate while minimising energy costs. Thanks to their simple installation and compact design, the decentralised ventilation units from Dimplex are a good solution for all existing buildings where a ventilation system is to be retrofitted. However, the uncomplicated installation and flexibility also speak in favour of installation in cost-conscious new builds.
How does decentralised ventilation work?
With decentralised ventilation, several ventilation units are installed in the outer walls of the corresponding living spaces. An air distribution system is not necessary with this variant, which is why the decentralised solution is particularly suitable for uncomplicated retrofitting.
In conventional houses, a ventilation system should primarily be seen as a measure to increase comfort. In passive houses and other buildings that do not allow windows to be opened, a ventilation system is an integral part of the building concept.
DIN 1946 Part 6 requires a ventilation concept to be drawn up for every new build / passive house. In this context, planners or energy consultants check whether the ventilation level for moisture protection can be realised independently of the occupants.
Decentralised domestic ventilation with heat recovery: Advantages
- Ensuring the necessary minimum air exchange
- Saving heating energy by transferring the heat recovered in the exhaust air to the cold incoming outside air
- Reduce heating costs and protect the environment thanks to heat recovery rates of up to 90 per cent
- Simple and quick installation and targeted installation in individual rooms by means of core drilling and electrical connection
- Independent use and control of the devices in several residential units
Decentralised ventilation in new and existing buildings
Decentralised ventilation is particularly suitable for new builds due to its small space requirement. The ventilation units are quickly and easily installed in the walls without having to install an air distribution system. In new builds, a decentralised ventilation system ensures a reliable air exchange. Fresh outside air circulates through the house and brings in oxygen without the need to open a window and possibly creating unpleasant draughts. At the same time, a decentralised ventilation system removes odours, moisture and viruses.
In the case of existing buildings, energy-efficient refurbishment is being pushed due to constantly rising energy costs and the aim of reducing CO2 emissions. Refurbishment also offers residents an increase in living comfort, for example by insulating the façade, installing new doors and windows or a heating system with hot water preparation. Decentralised ventilation can be retrofitted quickly in existing buildings, as only a core drilling is required.
Decentralised ventilation: Two different technologies
Decentralised ventilation systems with heat recovery are divided into two types according to their operating mode. Constant flow devices provide fresh air through continuous operation, such as the DL 50 from Dimplex. Push Pull devices, such as the DL 40, ventilate by means of a reverse function.
Constant flow devices
Constant flow devices are also known as permanent ventilators because of their continuous mode of operation. Two fans convey air simultaneously and evenly in two air volume flows. The so-called supply air volume flow transports the fresh air into the living space. The air is channelled out of the room via the exhaust air volume flow. A large proportion of the heat remains in the living space despite the reliable ventilation of the appliances, as the cross-counterflow heat exchanger mixes the fresh, colder outside air with the warm room air and thus recovers the heat. This means that a high proportion of the heat is retained in the air.
Discover DL 50 ventilation unit
Push-pull devices
With push-pull devices, two constantly corresponding devices work together, which is why they are also referred to as pendulum fans. They utilise the reverse principle for ventilation, as the air flow continuously changes direction via a fan. In practice, one ventilation unit provides fresh supply air while the other conveys the air out of the room. Heat recovery, i.e. the retention of heat in the air, is achieved by a heat accumulator. This stores the heat from the extract air and transfers it to the supply air. A controller connects the devices installed in pairs and ensures that the fans regularly change direction, so that the air volume flow always alternates.
Discover DL 40 ventilation unit