Mechanical Ventilation

Mechanical ventilation systems use fans to supply and/or extract air to and from the building. This enables specific internal temperatures to be maintained more readily than natural ventilation systems which function under variable wind and buoyancy forces. The three broad categories of mechanical ventilation are:

· Supply and Extract

· Hollow Core

· Mixed Mode Systems

Mechanical ventilation is predictable in its operation; it permits coupling to heat recovery and

filtration. If supply air is delivered to the space it also provides a means of distributing humidified air in winter, albeit at an additional energy cost.