Established in 1967
Building Preservation Specialists
Passive Ventilation

About Passive Ventilation

TDT offer a range of natural ventilation products and systems for domestic properties, providing an energy efficient alternative to mechanical fans.

TDT offer a comprehensive technical design and advisory service and can provide purpose designed solutions, tailored to individual projects on request.

Why Ventilate?

The home environment should be designed for comfort and health, whilst at the same time minimizing energy consumption.  Such design requires a balance of three elements: heating, insulation and ventilation.  All three are equally important to the indoor environment, and the well-being of the occupants.

Ventilation is needed ...
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To remove moisture and combat condensation from moisture vapour generated by washing, baths, showers, washing machines and people.
For comfort, to bring in fresh air and avoid nausea and stuffiness.
For health, to remove pollutants such as tobacco smoke, dust mites, which cause allergies and chemicals, which can be released by building materials.
To prevent damage to the building and decoration.
Ventilation and energy savings
Ventilation is essential but it has an energy cost.  It is therefore vital to select the most energy efficient form of ventilation.
Controlled passive stack ventilation is recognised by the NHER energy rating software as the most energy-efficient method of ventilation available.
Passivent is a system of controlled natural ventilation which ventilated the whole house, and automatically responds to demand.  Passiventilation uses no electrical power.
Building regulations

Passive Ventilation systems can be used to satisfy the requirements for ventilation set out in the 1995 Approved Document F1 (England and Wales) for all domestic type facilities.  It also meets the requirements for security, avoiding draughts and preventing rain ingress.

Further information on ventilation systems.    View a Case History for Ventilation.   View the many benefits of Passive Ventilation.