Envirowise EnergySaver DriAir Systems (Positive Pressure Systems)

The EnergySaver DriAir System from Envirowise is designed to provide a reliable solution to condensation and air quality problems within the home. Two versions of the positive pressure system are available – one for use in lofts in houses and the other designed for flats and apartments.

The systems works by introducing fresh, dry, filtered ambient air into the property. This ‘clean’ air is circulated around the property diluting and displacing the stale moist air and ultimately reducing the humidity levels to control condensation. The pictures below show the two versions – the loft version and the flats and apartments model.

The positive pressure systems are also proved to be beneficial in repelling the natural seepage of radon gas in areas where radon levels are a danger.

Timberwise Surveyor - Simon Lockyer

Accredited to

Simon Lockyer

Remedial Surveyor and Waterproofing Design Specialist CSRT CSSW
South West

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Condensation problem? Call 0800 288 8660 or

Envirowise EnergySaver Positive Pressure Ventilation

Envirowise EnergySaver Positive Pressure Ventilation System features:

  • Five year guarantee (parts only / fitting fee may apply)
  • Helps lower energy costs
  • Controls condensation and mould growth within the property
  • Reduces the build up of Radon Gas where this is a problem
  • Low maintenance

EnergySaver Positive Pressure Loft System

Our EnergySaver Positive Pressure Loft System also features:

  • A new state of the art digital motor – The positive pressure unit will constantly measure the airflow and keep the airflow at the desired rate. This new motor is also more efficient than our previous motor.
  • A new LED light on the heat switch panel – A clear indicator to show when the filter needs changing.
  • New style filter cover – Our new filter is now the largest available for a positive pressure loft unit giving clients an increased working life of the filter. Air is also now filtered from all sides of the unit.
  • As can be seen from the picture to the left the new unit can now be hung directly from a rafter or a cross member. This allows a less intrusive installation than the traditional unit which was fitted directly on to ceiling joists. An added benefit is also less vibration and noise when in use.

EnergySaver DriAir Positive Pressure Systems Special Features

  • Energy efficient – consumes as low as 4.5 watts
  • DC motor for quiet operation
  • Diffusers designed to minimise draughts
  • Versions available for flats, apartments and houses
  • Optional pre heat facility on house versions (standard on the flat and apartment models)
  • Four air volume speed settings

How the positive pressure units work

The loft unit is fitted into the roof void and ducted via an air diffuser, normally mounted in the ceiling above a stairwell. Where there is a pre-heat facility a control switch is conveniently sited to allow the user to control the heating facility and the fan speed.

The flat unit is fitted on a convenient wall, as close to the intake point as possible, ideally, the unit should be fitted inside a half cupboard, where access to an external wall and ambient air is possible. Supply ducting is then run to an outlet air grille, normally situated in the hall, in order that the introduced air is delivered to a central point within the dwelling.