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The Room Suggestions are intended as a guide only to the most common locations for fans in the range.
| The Problems Caused by Poor Ventilation | ||
Stale Air
Stale air can be caused by cooking smells, smoking, odours remaining in the bathroom, a general lack of ventilation around the house as well as a damp atmosphere.
All these problems cause an avoidable level of discomfort as well as the risk of respiratory illness and general poor health.
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Condensation
Problems occur when steam from the kitchen or bathroom finds relatively cooler surfaces around the house and condenses. Attempts to conserve heat by sealing windows - and therefore reducing natural ventilation - makes this problem even worse.
Condensation can cause considerable problems, from peeling wallpaper and mould growth to severe structural damage such as wood rot and damp.
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Solving the Problems
Building Regulations
The Building Regulations Document F1 (1995 Edition) outlines the importance of ventilation and stipulates that mechanical ventilation must be installed in kitchens, bath/shower rooms and toilets.
All Manrose fans comply with or exceed current Building Regulations and are capable of extracting not less than 60 litres per second from kitchens and not less than 15 litres per second from bath/shower rooms. This means that humidity is removed at source before it can reach the cooler part of the dwelling and cause damage.
Specific requirements of The Building Regulations Document F1 (1995 Edition) on ventilation are as follows:
- Bathrooms:
The Regulations require a fan capable of minimum extract capacity of 15 litres per second 54m³hr (32CFM).
- Toilets:
The Regulations require a fan capable of at least 3 air changes per hour and with a 15 minute over-run timer. N.B. 15 minute over-run is not a requirement in Scotland.
- Kitchens:
The Regulations require a fan capable of extracting 60 litres per second 216m³hr (127CFM).
- Utility Rooms:
The Regulations require a fan capable of extracting 30 litres per second 108m³hr (63CFM).
A fan should always be sited in the furthest window or wall from the main source of air replacement to avoid short-circuiting the airflow.
It should be located as high as possible in the window or wall nearest to smells or steam, but not directly above eye-level grills or cooker hoods.
If the room contains a fuel burning device (such as a gas boiler) with a non-balanced flue, it is essential that there is enough replacement air to prevent fumes being drawn down the flue when the fan is extracting to its utmost capacity.
IEE Regulations (U.K.) require that a conventional mains voltage fan in a bathroom or shower must be located where it cannot be touched by a person using the bath or shower and well away from any water spray.
Alternatively, the new Manrose range of 12 volt S.E.L.V. (Safety Extra Low Voltage) fans are specifically designed for the safe ventilation of toilets, bathrooms and shower rooms and can be fitted within the splash area with absolutely no risk of electric shock.
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To calculate the correct fan required for a particular room you need to know the room volume in cubic metres, i.e. length x breadth x height, and then multiply by the number of air changes required.
Minimum Air Changes Required Per Hour
Stale air is also removed by installing the appropriate Manrose fan. In certain circumstances, such as in toilets, a timer is incorporated to provide an automatic turn-on period of 15 minutes as stipulated in The Building Regulations. |
22m³Choosing the Right Manrose Fan
REMEMBER:
- Axial Fans are designed to move air over short distances,
i.e. window fixing or through mounting, and are not suitable
for ducting over 2 metres in length. Available in 4", 5", 6" ,9"
and 12" sizes.
- Centrifugal Fans are designed to move air over longer
distances and will perform well against the pressure
caused by long lengths of ducting and resistance by
grilles. N.B. When ducting vertically it is recommended
that a condensation trap is used.
- Humidistat Controls Manrose have a complete range of integral Humidistat Controls on all their fans; they are also available with a pullcord override switch. A remote mounted model is also available (1360). All are designed to switch on the fan as the humidity rises in the bathroom and off as it drops. It will continue to monitor the humidity 24 hours per day, thus preventing mould growth on walls and ceilings and drastically reduces condensation problems.
- Standard. For remote switching through wall light or separate switch.
- Timer model with built-in adjustable time delay operated by the light switch.
- Pullcord model with built-in pullcord switch.
- Humidity controlled models with built-in adjustable sensor which operates the fan automatically.
- P.I.R. model sensitive to movement. Switches on when room is entered and off when room is vacated.
The Range
4" - Bathroom Fans
XF100/XP100/WF100 range of 4" extractor fans includes models with remote switching, integral pullcords, electronic time delays and humidistat controls. 4" range now available with automatic shutters.
5" - Bathroom Fans
The XF120/XP120 range of 5" extractor fans are designed for larger bathrooms and are 56% more powerful than the 4" models. Also suitable for utility rooms. Conform to Building Regulations.
5" range now available with automatic shutters. This range also includes a window version.
6" - Bathroom/Kitchen/Commercial Fans
The XF150B/WF150B/XP150B range of 6" extractor fans are powerful enough for kitchens, cloakrooms and laundry rooms, as well as offices, shops and restaurants.
6" - Axial Fans - Domestic/Commercial
The XF150/XP150/WF150 range of 6" fans are axial flow fans for wall, ceiling or window mounting and are suitable for kitchens, utility rooms, restaurants, offices and shops.
9" - Extractor Fans - Domestic/Commercial
The WF230 range of 9" extractor fans are suitable for window and wall mounting and cover a wide variety of domestic and commercial applications including kitchens, utility rooms, pubs, restaurants, offices, shops and factories.
The XF230 range of 9" fans are suitable for flush fitting into exterior walls.
XFS230 Series
Surface mounted 9" extractor fans for wall or ceiling mounting. With its slimline profile of only 62mm it will blend in unobtrusively into any location.
WF300 Series
The WF300 range of 12" extractor fans suitable for window or wall mounting are now available. The XF300 is suitable for flush fitting into exterior walls.
Electro-Mechanical Humidity Controlled Fans
Designed to switch on as humidity rises.
XF100MH 4" fans will monitor humidity, thus preventing mould.
Passive Infra-red Fans
P.I.R. extractor fans sensitive to movement will switch on the fan when someone enters the room and switch it off when the room is vacated. The units incorporate a time delay switch, which requires no switched live and is energy efficient. Range 5 metres.
Manrose is the UK's fastest growing manufacturer of domestic ventilation fans and equipment. As such, we have made a major impact on the ventilation industry. Our fans and equipment are of such high quality that we unhesitatingly offer a 2 year 'no quibble' guarantee.
Tel: 01753 691399, Fax: 01753 692294, email: sales@manrose.com