Also known as 12v fans or LV fans, they require a transformer, housed in zone 3 or outside the zones to reduce the mains voltage v to 12v. Usually, but not always, the transformer is supplied with the fan. Any fan, regardless of voltage, that has an IP45 rated motor.
Any fan rated for zones 1 and 2, by default, may be installed in zone 3. Zone 3 and Outside the Zones Any extractor fan, regardless of voltage or IP rating may be installed here as these areas are deemed a safe distance from the principle sources of water, the bath and shower.
Inline fans are another type of extractor fan which are installed in the loft space above the bathroom. A length of ducting connects the fan to the bathroom. Since the fan itself is housed remotely,outside of the zonal area, with only a plastic grille in the bathroom ceiling, they too are suitable for extracting from any bathroom zone. Switching and Operation Options All fans maybe wired into the lighting circuit, so that they turn on and off with your lights, or a separate remote switch, allowing them to be operated independently.
Basic models are operated by the light or remote switch only. Timer models feature a timer which keeps the fan running for a set period after the light or remote switch is turned off.
This ensures all steam has been extracted from the bathroom. Fans with Humidistats will turn on automatically when humidity in the bathroom reaches a pre-set level and off when the humidity falls back to its preset level. These are great in bathrooms where the lights and fan are not always turned on manually and are popular with landlords, or in those installations where a fan is only required to extract steam. Fans with integral Pullcord are rarer these days, but allow for local operation.
Aesthetics Remember that you are likely to see this fan every time you use the bathroom. Low energy. On full power it uses only 7. Virtually silent 25db A. The best 4 inch axial fan we have ever tested. Mounted in the loft above the bathroom, this inline fan can be ducted from directly above the shower or bath. Using only 25w it's very energy efficient. Incredibly quiet, particularly so considering its power.
Extracts steam before it condenses. Centrifugal extractor fans In your research you may have come across the term 'centrifugal extractor fan'.
Extractor fans that are suitable for bathroom installation can be broken down into three basic types:.
Ideal for a bathroom with no external walls. Often including more switching and operating options, Centrifugal fans can be set to run at a low rate so there is always some flow through the room, even when there is no-one in there. The air pressure within the duct will cause the air to slow as it is pushed farther away from the fan. This is where a centrifugal fan can be useful as they generate more pressure to counter the greater length of ducting. Which fan you fit will depend on what zone your are installing it in.
More on that in a bit. How loud your fan is can be a huge determining factor for what fan you decide to buy, no-one wants to be trying to have a relaxing bath with what sounds like a jet engine mounted in the wall. The noise level of extractor fans is displayed in dB A or decibels. It is worth bearing in mind that the decibel scale is not linear, and also doesn't correlate with general perceived ideas of sound. Decibels are a measurement of sound pressure, not actual volume.
The difference between 20 and 30 decibels is less in volume than the difference between 30 and 40 decibels. Have a look at this decibel comparison chart to give you an idea of what decibel readings compare to. In recent years however the trend has moved towards even lower decibel levels. As fans get larger and the flow rate gets higher, the decibel level also rises.
The Silent Tornado, for example, is whisper quiet at 24dB A. Please note that manufacturers' quoted decibel levels are taken 'at 3 metres' - This is the industry standard. Furthermore, these measurements are taken in test environments which may not necessarily replicate your installation. Also bear in mind that any fan activated during the night - by a call to nature for example - will sound louder than during the day. All fans maybe wired into the lighting circuit, so that they turn on and off with your lights, or a separate remote switch, allowing them to be operated independently.
Further to that, extractor fans have a range of extra switching options which suit different applications and requirements. Many fans are available in three versions - Basic, Timer and Humidistat, but some ranges also have pull cord and PIR versions. This ensures all steam has been extracted from the bathroom. These are great in bathrooms where the lights and fan are not always turned on manually and are popular with landlords, or in those installations where a fan is only required to extract steam.
Choosing where to install your fan is a combination of electrical safety and common sense. The first and most important consideration is electrical safety. When fitting a fan in your bathroom, you must understand which Bathroom Zone you are installing in. There are three bathroom zones, numbered 1, 2 and 3. Zone 1 is basically the area of the bath or shower cubicle and up to 2.
Where possible, it is best to try to fit your fan in Zone 1 where it is close to the source of the steam. They will remove the water vapour out of the bathroom, once you've finished having a shower.
Axial: An axial extractor fan pulls the extracted air through an impeller, and then out through the hole in the external wall. They are the most common extractor fan, and ideal for bathrooms and smaller rooms where ducting of metres is required. Centrifugal: Centrifugal extractor fans extract air at right angles to the fan intake, and then spins the air outwards to the outlet by centrifugal force. They can extract more air, and are suitable for rooms with longer ducts.
Inline: Inline extractor fans often sit in ceilings above the room, make a lot less noise and can be used in situations where extremely long ducting is required. They are ideal for rooms without an external wall, or where the noise of your extractor fan is an issue. They can be used to prevent heat loss, as there isn't a need for a hole in an external wall.
To decide where you should put your extractor fan, consider which places in your home cause the most damp problems. In the bathroom, hot showers each day will generate a lot of water, heat and moisture. A temporary solution would be to open your window, but you wouldn't want to do this in Winter.
It would be most ideal to place your extractor fan on the wall to the side of the shower. This is Zone 1 of the bathroom. An Explanation of Bathroom Zones is below. Zone 0 is inside the bath or shower itself. Any fitting used in Zone 0 must be low voltage and be IP67 rated.
Zone 1 is the area above the bath or shower to a height of 2. In this zone, a minimum rating of IP45 is required but IP65 is also accepted. Zone 2 is the area 0.
In this zone an IP rating of at least IP44 is required. There are many different fan sizes available to choose from. If you're retrofitting a new extractor fan into an existing hole, the fan size will be the same size. However, if you are designing and renovating a space, here's a handy guide on how room sizes match up to the hole size required:. Firstly, you need to measure the size of your bathroom. Use a tape measure to measure the height, width and length of your bathroom in metres.
For example, let's say your bathroom is 4 metres long, 2 metres wide and 3 metres high. Bharat Ventilation Systems.
Industrial Extractor Axial Fans. Simpovent Shreeji Sales Corporation. Hari Om Fibre Industries. Purus Filtrotech Private Limited. Stainless Steel Industrial Turbo Ventilator. Enkay Building Solutions. Sat Kabir Enterprise. Maa Enterprise. Tekvihaan Engineering Solutions. Axial Extractor Fan. Cooling Solutions. Deshan Engineers. Extractor Industrial Fans. Ask Price. Hexagon Engineering. Extractor Fan Price. BETA These are indicative values based on popular product prices.
Prices across cities for Extractor Fan. Is the information useful?
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