Airflow adds VAV control to its commercial MVHR range
Leading ventilation manufacturer Airflow Developments has added variable air volume (VAV) dampers to its Duplexvent range of commercial mechanical ventilation with heat recovery (MVHR) units. The VAV systems constantly monitor the air volume supplied and share this information with the ventilation unit. As such, the systems ensure optimum air quality and comfort by allowing the ventilation to respond effectively to the demands of each area of the building.
This article was originally published in issue 19 of Passive House Plus magazine. Want immediate access to all back issues and exclusive extra content? Click here to subscribe for as little as €10, or click here to receive the next issue free of charge
Commercial buildings such as offices, schools, hospitals and retail environments can utilise MVHR technology to protect their building fabric, as well as ensure occupants are benefitting from healthy, fresh air and a comfortable indoor climate. However, with many centralised MVHR systems the ventilation rate remains the same in each room regardless of changes in occupancy levels, temperature or humidity. This means that constant human intervention is needed to deliver the correct air flow at the required system pressure.
VAV dampers offer a solution because they control the flow of air to each zone of the building in response to changes in demand.
This helps to maintain a consistently high quality indoor air environment. The VAV dampers fitted to the Duplexvent range constantly monitor the air volume passing through the system and send this information to the centralised ventilation unit.
The communication between each damper and the central unit allows the MVHR system to increase or decrease the flow rate quickly and efficiently based on the demand. When used in conjunction with humidity or CO2 sensors, these dampers can automatically adjust the ventilation rate based on the usage or occupancy of that room, independent of the other areas within the building. Airflow’s VAV system also provides the option of manual adjustment for applications where the user requires a level of control.
“Indoor air quality is increasingly being recognised as a key factor for health and wellbeing but the reality is that ventilation requirements can vary significantly across different areas of a building and at different times of the day,” said Krzysztof Kwarciak, category product manager at Airflow Developments. “The latest development to our Duplexvent range, the VAV dampers system, ensure our MVHR units can respond swiftly and effectively to these changes in demand.”
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