Domestic ventilation system is controlled to meet demand
Aereco’s DXR domestic MVHR (mechanical ventilation with heat recovery) system adjusts ventilation according to the needs of each room, rather than delivering constant or globally controlled airflows. The company claims 92% energy savings compared with mechanical exhaust ventilation at constant airflow, while providing the same indoor air quality.
Modulating airflow significantly reduces average airflows and halves heat losses compared with constant-flow systems. The heat exchanger has a yield of around 85%.
The fans have electronically commutated motors to reduce power consumption.
Another benefit of the DXR system is that filters stay cleaner longer, since the average airflow is around half that of an MEV system.
A DXR system comprises a heat-recovery unit connected to exhaust units and the Hub dispatching box, which controls the supplied airflows. The main unit incorporates a counterflow heat exchanger, which can be bypassed when it is mild outside. A free-cooling mode provides cooling overnight in summer.
Airflows are controlled according to the needs of each room in response to CO2 levels or presence. At the exhaust point, the BXC units adjust airflow according to variable settings — such as humidity in a bathroom, presence in a WC, humidity and switch in the kitchen to boost airflow. CO2 or VOC sensors can also be used for exhaust units.
