BROOKVENT aircycle ONE is a continuous running, low energy, ultra-quiet, alternate flow supply and extract fan with heat recovery for use in habitable areas such as living rooms, bedrooms, dining rooms, basements and hallways. (THIS IS A UNIT ONLY, OPTIONAL CONTROLLER CAN BE PURCHASED SEPARATELY). 

Core features include:

• Extremely low power consumption costs around GPB 5 a year to run
  for continuous operation on low speed.
• Energy efficient Integral Regenerative Heat Exchanger with
  up to 82% efficiency.
• Unique design winglet-type impeller, providing enhanced aerodynamic
  properties, low noise and increased efficiency.
• Aesthetic flat front cover for modern interior design, easily
  removable for cleaning without the need of tools.
• Each model comes with 3 different airflow settings.
• IPX4 protection.
• Optional user controller which can control up to 10 units
  allowing selection of off/ speed 1/speed 2/speed 3/extract
  or supply only.