TDT Preservation Ventilation Benefits

·	Demand Control and Comfort - Passiventilation systems provide fully automatic, demand-controlled ventilation. They respond to humidity levels and hence to occupant's activities, giving optimum comfort conditions.
·	Complete House Ventilation - Passive systems ventilate the whole house but respond to demand in each space individually, providing correct levels of ventilation room by room, 24 hours a day.
·	Energy Efficiency - Passive systems score higher on the NHER energy rating programme than any other form of ventilation (AIVC report). Buildings can be more energy efficient, CO2 emissions are minimised and occupants can enjoy lower fuel bills.
·	Combat Condensation and Mould - Assured, effective ventilation helps to combat condensation and mould growth. This brings long term health benefits and minimises future refurbishment costs. 15% of the UK population suffers from some form of allergy problem, often caused by mould and house dust mites. A household of four people can generate up to 14kg (24 pints) of moisture vapour per day (BS 520).
·	Continuous Gentle Extraction - the continuous gentle extraction of Passive systems is quiet and unobstructive, and therefore unlikely to be tampered with by occupants. Continuous low level ventilation is more effective in removing lingering humidity which often results from domestic activities such as cookng, drying clothes, bathing and showering. The low extraction rate poses no threat of combustion fumes spillage.
·	Automatic Boost - humidity sensitive control provides an automatic boost effect as an integral feature, by allowing greater airflow when condensation risk is high. As the humidity level falls, the airflow is correspondingly reduced. The operating range start at 40% RH, giving close correlation of ventilation with humidity/CO2 levels.
·	Ideal for Disabled - with automatic respond and no operating controls, Passive Ventilation is ideal for the disabled and elderly.
·	Meets Building Regulation - Passivent meets all the requirements for ventilation in domestic buildings.