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What is ventilation
Ventilation is simply the removal of ‘stale’ indoor air from a building and its replacement with ‘Fresh’ outside air. It is essential for the health and comfort of the occupants of a building
Why is Ventilation required
When people or animals are present in buildings, ventilation is necessary to dilute odours and limit the concentration of carbon dioxide and airborne pollutants such as dust, smoke and volatile organic compounds (VOCs). Ventilation air is often delivered to spaces by mechanical Air movement into buildings can occur due to uncontrolled infiltration of outside air through the building
How Does Ventilation Work
Ventilation is a process of "changing" or replacing air in any space to provide high indoor air quality.
What different types of fans are available
There are 3 main types of fan available:-
Is there a minimum amount of ventilation required?
For new build premises with intermittent mechanical ventilation, Documents L and F (2010) of the Building Regulations must have the following minimum extract rates:-
For new build premises with wholehouse ventilation, or wholehouse ventilation with heat recovery, Documents L and F (2010) of the Building Regulations must have the following minimum extract rates:-
What is Intermittent Ventilation
Intermittent ventilation is where a fan does not run all the time, usually only running when there is a particular need to remove pollutants or water vapour (e.g., cooking or bathing)
What is Mechanical Extract Ventilation (MEV)
Wholehouse mechanical ventilation systems are designed to provide continuous, simultaneous ventilation to multiple areas in modern dwellings. Ideally suited to new-build with airtight, well-insulated construction for the most effective performance, these units can be user controlled to give a manual ‘boost’ function at times of high need.
What is Mechanical Ventilation with Heat Recovery (MVHR)
Wholehouse ventilation with heat recovery provides the benefits of a wholehouse system with the addition of a high-efficiency heat recovery cell. This state of the art system simultaneously extracts moisture from wet areas passing it through the heat recovery cell to temper the incoming fresh air, which is then distributed around the dwelling. This provides a saving in energy as well as providing replacement air throughout the whole house.
What controllers are available for the fans
There are controllers which can be incorporated in the fan itself or installed as remote accessories. There are 5 main types of control available:-
What accessories may be required for the fan?
Addvent offer a wide range of accessories for its fan range. These include wall kits, window kits, a range of flexible, solid and insulated solid ducting ranges, connection pieces and grilles. Please refer to Accessories section for full details (put clickable link here)
Which controllers can be used with each fan
Addvent offer a wide range of speed controllers for its fans from 150mm upwards, including its commercial, industrial and inline ranges. Also available are a range of remote controllers for overrun timer, humidistat and PIR. (Put clickable link here)?
Siting the fan
When siting and installing extractor fans, the following should be considered;
What is IP Rating?
Electrical equipment may be identified as having a certain level of mechanical and moisture protection. This is called Ingress Protection and is quoted as an IP number – such as IPXY, where X and Y are numbers. X indicates the level of mechanical protection and Y the level of moisture protection. In both cases, the higher the number, the better the protection. If and item of electrical equipment is not rated it must not be used in zones 0, 1 or 2 (or elsewhere in a wet/damp environment). (put clickable link to zone diagram from Addvent catalogue P78 here)
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