Demand Controlled Ventilation Ensures Energy Savings and High Indoor Air Quality
SAV Systems’ AirMasters aim to provide consistently good indoor air quality over the long term. Although this objective is easily stated and understood, it can be challenging to achieve in practice. Here are some of the issues which make the difference:
1. Heat Exchanger Design. The aluminium contraflow heat exchangers utilised by the AirMaster air handling units have excellent conductivity, which enables the air pathway openings to be sized generously. Any condensate formed within the exchanger extract pathways runs out rapidly to the collection tray, leaving the air pathways clear even at low temperatures. Condensate is dispersed by evaporation into the extract air flow.
2. Good quality air filtration. This feature is important, not only to removing contaminants from incoming air, but also to maintaining the cleanliness of the heat exchanger surfaces. AirMaster units are equipped with M5 filters as standard, which keep the heat exchangers working efficiently. Where a higher level of contaminant removal is required (eg, for medical surgeries), F7 filters can be provided instead.
3. Effective noise control. Noise can seriously detract from user experience. As direct ventilation units are in the same room as the occupants they serve, keeping noise emissions under control is crucial. AirMaster units emit only 35dB(A) at 1m at full throughput. Where external noise is potentially an issue, their attenuation of 49dB is sufficient to neutralise whatever noise attempts to come in through the air pathways.
AirMaster air handling units can be adapted in many different ways. They can be:
- Fully exposed below the soffit, or recessed (1/3 or 2/3) in the ceiling void.
- Placed against an external wall or connected to this by up to 8m ducting.
- Floor mounted for either mixing or displacement ventilation. The sides can be used as partitions, notice boards or sound absorbent barriers.
- Arranged for modulating control of CO₂ level or humidity. Alternatively, PIR displacement sensors can be used instead.
The importance of indoor air quality
Inadequate ventilation can lead to uncomfortable build-ups of heat and carbon dioxide from occupants and equipment. Once carbon dioxide levels exceed 2,000 ppm, physical effects such as drowsiness and impaired concentration become apparent. Efficient ventilation produces good indoor air quality, which in turn enables improved concentration, alertness and a sense of wellbeing.
SAV are happy to provide guidance for any application. With over 45,000 AirMaster demand controlled ventilation air handling units currently in service throughout the EU, there is a wealth of experience to draw on. Whether for retrofits or new build projects, SAV can offer a view on good ventilation options for you to consider. Whatever level of project information is available to you, do get in touch to see how AirMaster might be able to help. We take pride in our practical, hands-on approach and technical support.
For further information on heat recovery ventilation systems, please contact us:
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