con•den•sa•tion n.
“The change of a vapour or gas into liquid form. This change of state is accompanied by the release of latent heat, which alters the adiabatic temperature change in rising air. Condensation in meteorology can be caused by: the cooling of a constant volume of air to dew point, the expansion of a parcel of air without heat input, the evaporation of extra moisture into the air, the fall in the moisture-holding capacity of the air due to changes in both volume and temperature, and contact with a colder material or air mass.”
Ref: http://www.answers.com/topic/condensation Opens in new page
the arrestair-pro vent
- Arrestair Pro
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- Combined grille and hood
- Controls wind blast and prevents draughts irrespective of wind direction
- Does not cause significat reduction of ‘Effective Area’ in cross winds
- Saves energy with passive air flow
- Provides over 5000 mm squared equivalent area when used with most duct sizes
- ArrestAir-Pro+ DiffuseAir for Background Ventilation
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- Internal grille has maunually controllable internal closing plate plus fly mesh
- Safely prevents gas spillage caused by side winds
- Conforms to BS EN 13141 - 1:2004
- Conforms to Building Regulations Part F, april 2006
the passyfier vent
- Passyfier Dehumidifier Vent
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- Available in a range of colours
- Maximum water vapour transmission 2.3 litres per 24 hours
- Includes white internal grille with fly screen
- Core and sleeved vent kits available
ArrestAir Pro Vent
Provides air combustion venting for heating appliances. The external grille can be retro-fitted over existing draughty vents, and has universal coverage.
Best in class for safety and Anti-Draught Performance.
NEW ArrestAir Pro+ Vent
For background ventilation.
Passyfier Dehumidifier Vent
For condensation control.
Used and approved by:
Local Authorities, Housing Associations, Damp Proofing Contractors, Condensation Specialists, House Building Contractors.
NEW Lofty Plus
Whisper quiet loft mounted ventilation system the Lofty controls condensation, mildew, mould and dampness creating a fresher and cleaner living environment.
The Lofty Plus is a true ventilation system that uses natures's fresh air to ventilate the entire house, a ventilation system that installs unobtrusively in teh roof space and gently introduces fresh air into the home.
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