© The Fan Ce. All Rights Reserved.
Design & Development by Reflow Studio
Having researched the Seebeck Effect and TEG modules (Thermoelectric power generation module), I purchased a selection of components and made a series of DIY woodburner stove top fan prototypes, the best of each version was developed subsequently into the Fan-C shown here.
It sits on top of my Morso Log Burner and being a heat powered fan, it starts up at about 100 degrees C (flue pipe temp), it runs faster as the temperature climbs up to 240 degrees. If I move the fan position on the stove top I can adjust the fan speed. I use a stove top thermometer to determine the surface temperature of the stove top – anything between 100 & 250 degrees C is fine.
The principle is in generating a temperature variation between the upper and lower plates of the TEG module. The upper copper cooling fins and the fan moving air over them ensure that the upper surface is cooled while the lower surface is heated by the stove top contact. The transfer of heat through the TEG enable the module to do its technical bit and generate the electricity for the fan motor.
Good fun if you like that sort of thing – having come up with a Small and Compact Stove Top Fan whicht fitted a treat on my second Morso Badger stove in an old coal fireplace – where as all others on the market were and still are too big. The Fan C units sit on top of my stoves and without trouble push the warm air into the room evening out the air temperature to a comfortable 18 degrees C without the stoves roaring like a blast furnace!
A point to note is that unlike the mainly aluminium based versions on the market, which require placement at the rear of the stove to pull cool air from behind the back of the stove – the small Fan C units have the far more efficient copper cooling fins – the increased surface area and improved heat conductivity of copper means the fan will run anywhere on the stove top and is ideal for situations where a Woodburner or Multifuel Stove has been installed into an old Coal Fireplace…. you know, like with a shoe horn!
The design has proven to be popular and as a result I have added the Fan-C & the larger version the Fan-Ce to my portfolio of products with this dedicated website. Please use the PayPal button below if you would like to purchase a unit. I will make a ‘special’ which may have a more ‘designer look’ to it with ‘black / grey lacquered copper fins’ and a different colour of fan centre hub – if you like to have something really different or have a stove without a flat top use the contact form to discuss further.
measure 145 mm high 113mm wide and are ideal where your stove has been set into an old Coal Fire place with limited head room. It is 75 mm front to back and sits on a 75 mm diameter disc. it moves upto 78 cu/mtr/hr. (45cfm)
measure 158 mm tall, 125mm wide and 100 mm front to back sitting on a 75mm diameter disc. This moves upto 91 cu/mtr/hr. (54cfm)
All Fans now ship as a High Temperature version (HT) designed and tested with the aid of Nottingham University Environmental Technology Centre. The tests confirmed that Hot Plate Temperatures upto 350 degrees C were acceptable and did not result in the fans TEG module failing as long as there is sufficient free circulating air around the hot plate. It should be understood that placing the Fan-C or Fan-Ce at gas mark 9 all evening may cause problems – we recommend a stove top Temp not higher than 250 degrees C and plenty of air around the stove to assist with the convection currents the fan is there to assist. Common sense prevails on most occasions If in doubt please use the contact form below to discuss.
International Buyers Please note – postage costs will be confirmed and you will be contacted after order placement should these exceed the prices included within the PayPal standard prices. Alternatively please request postage costs in advance through the contact form. If you would prefer to order & pay by cheque, please use the contact form and we will be in touch within a few hours to confirm details etc.
All prices plus P&P @ £11.50 UK. International Buyers Please note – postage costs will be confirmed and you will be contacted after order placement should these exceed the prices included within the PayPal standard prices. Alternatively please request postage costs in advance through the contact form.
If you would prefer to order & pay by cheque, please use the contact form and we will be in touch within a few hours to confirm details etc.
Fan-C Black (£185 +p&p) – Small amount of stock available. Please email your interest & we will forward an order invoice.
Fan-Ce BLACK (£225 + p&p)- Small amount of stock please email and an invoice will be forwarded.
All Fan-C Copper Units Now ship with Black Blade sets.
A service kit for your stove top fan is available for £35+p&p. This kit includes the TEG (Thermo Electric Generator), Motor and Mount Plate Assembly, Thermal Paste, Heat Transfer Shim, Hex Key for fan blade removal and emailed instructions to complete the service and of course telephone support in the unlikely event that you run into a problem. A service takes approx 35 min and will require the wires to be soldered at the rear of the motor.
The fan is designed to move more air around the stove surface and into the room – unlike a desk fan, it is not designed to create a ‘draft’, it assists the normal air movements of convection from the stove and is ideally suited to stoves placed in small fireplaces where air flow is restricted.
The fan is assembled from some new and some used components, as such the working life they have had and will provide is not easy to establish. Because of this the assembly is such that the components can be changed if they fail. Unfortunately this can result in for example the fan assembly moving on the motor shaft during postage. As you unpack your fan – removing the bubble wrap carefully so as not to damaged the copper fins of the heat exchanger, take care not to damage the two wires at the rear of the fan unit. The fan should first be held by hand and the fan blade spun by finger pressure to be sure it has not been pushed hard into the copper fins during handling / postage. If it has, ease it back away from the fins and obstruction. In extreme cases the motor body can be gently pushed from behind on its support to move the fan forward.
Light your stove, let the stove get warm and up to its normal operating temperature. If you have a stove top thermometer – which are very useful to ensure your combustion process is efficient and minimizing smoke etc. Place the thermometer on the top of the stove and see what temperature is present. The fan will work at its fastest between 100> < 250 degrees Centigrade (Stove Top). Place your fan on the stove top and allow a couple of minutes for the aluminium base disc to come up to temperature – if your fan doesn’t start to turn on its own, give it a little nudge clockwise with your finger tip. If the copper fins warm up quickly, you may have to remove the fan for a minute and then retry.
The Thermo Electric Generator requires a hot side and a cold side which causes a heat transfer through it. The hot side is the base heated by the stove top, the cold side is the top surface cooled by the copper heat exchanger. the unit operates as long as there is a suitable difference between the temperature of both sides. The greater the difference the more efficient it becomes and greater power output will result (faster fan speed). The main running issues are associated with the air temperature above the stove top plate. Within a confined space the air temperature above the stove can become extremely elevated. The cooling effect of the copper fins will be reduced and the efficiency of the TEG unit reduced accordingly – the fan slows or stops. If the stove hot plate is above 200 degrees C and the fan is not running the TEG will become damaged through excessive heat exposure – the heat transfer will not occur and the prolonged exposure to 200 degrees C melts the internal solder – the unit must then be repaired.
The Thermo Electric Generator (TEG) module between the base disc and the copper cooler is designed to operate below 200 degrees C, the base of the fan is designed to restrict the heat transfer to the TEG thus protecting it; without it – the internal solder ways of the TEG become molten and migrate – when this occurs the damage can not be repaired and a new TEG is required. These are available fitted from Look Creations at £35 + P&P. It is advised not to leave the fan on the stove top overnight or when burning the stove on a very high temp’ burn or unattended.
The HT base profile has been designed to minimize the heat exposure from High Temperature Stove Tops. Lab’ Hot Plate tests at up to 350 degrees C have been successfully conducted over extended time periods – however, as each stove installation is different, we recommend keeping the stove top at up to 200 degrees to avoid problems with the TEG & Fan. Excessive heat exposure to the TEG is not covered by our guarantee. In certain stove installations, limited air flow around the stove itself cause air temperatures to be very high, these prevent the cooler working efficiently and may cause the fan blades to become damaged and the unit to fail. In these circumstances the fans should not be used.
The fan will run toward the front or rear of the stove due to the efficiency of the cooler, if however, the stove temp’ drops below 100 degrees C, the fan speed will slow and may stop, at which point the copper heat exchanger will slowly warm up through the radiant and convection heat from the stove top. Before re-charging the stove with fuel or opening the vents to increase the burn temp – lift the fan and put it at rest to cool away from the heat source before replacing on the stove top.
As a rule of thumb, the maximum stove top temp’ can be gauged by converting the vertical height in millimeters to degrees centigrade. i.e. 180mm height over the stove = max temp of 180 deg C for the stove top. A temperature of between 145 & 165 deg C would be ideal.
Any damage identified at the time of delivery should be reported to the courier and then by email to this site. We will endeavour to repair or replace the unit. If possible please do record the condition of the packaging and unit via a photograph and email the image to us. The unit should be returned to us within 7 days from the date of dispatch (postage mark on package).
Faults which occur in the first 12 months – in the unlikely event of component failure, in the first instance please contact us via this website – in the event the fan requires a new part the unit should be returned and it will be repaired FOC providing always that the operation instructions have been followed.
Accidental damage to units will be repaired at component cost plus postage – in the first instance please email via this site to obtain an estimate of these costs, or if preferred the replacement parts can be posted out with replacement instructions.
In the event you are unhappy with your purchase please return it unused within 7 days – for a refund excluding postage costs and a £15 handling fee. If the unit is damaged on return the repair costs will be deducted from the refund.
In no particular order:-
Q. Will the Stove Top Fan-C fit ?
A: The Fan-C measures 145mm tall (5 5/8th”) – so if your stove top has at least this much room above it – the answer is yes.
Q. Will the Stove Top Fan-Ce fit ?
A: The Fan-Ce is the larger model, it measures 160mm tall (just over 6″) HOWEVER, it works best when there is plenty of room around the stove including over the top – if your stove is enclosed in an old fireplace buy the smaller Fan-C unit it will perform better
Q. My Stove is 18kw will the Fan C work on it ?
A: The answer depends on many factors – the key two are the surface temperature range of the Stove Top (i.e. where it sits) and the air temperature around the stove top – the latter is affected by the stove temperature, the amount of air circulation around the stove and available cool air to be drawn in below and around the stove. These factors can create many different conditions even before the interaction of stove vents, fuel type etc etc – For this reason, all the Stove Top Fan Ce range are sold with a no quibble return policy – provided that the unit is returned in good working order within a reasonable time frame & no a years trial is ‘unreasonable’ ! Please see the returns policy for details.
Q. Will the Fan-C work on my stove with a curved top ?
A: The fan base requires good contact over its entire area. No it will not work on a curved surface HOWEVER, we can make a special unit suitable for curved stove tops – use the contact form to request more details
Q. How long will the Fan-C last / work for – before it wears out.
A: This is dependent on the conditions of use – the hotter the stove surface and air temperature around the Fan the shorter the working life of the unit – we offer a service repair for all returned units where the ‘wear parts’ are replaced and the unit returned for £45 (current charge Nov 2013)
Q. My fan has stopped – Can I repair it ?
A: The units are made in such a way as to enable all the separate parts to be replaced. We can supply you with a kit and instructions by post for any parts – please use the contact form for details. A screw driver, soldering iron and small allan key are all that are required. A full service can be completed within an hour for the first time, some of it is a little fiddly if like me you have big hands ! Of course if you return the fan to us, we will undertake the work for free only parts are charged & postage.
Q. Will the Fan-C push the air from the hot enclosed stove out into the room and out through the door to the hallway and then along the hall and into the front room which is terribly cold in the winter ?
A: Probably not…… it will push the air into the room where the stove is – natural air circulation will tend to take effect and warm air will rise – so once it leave the room into the hall way it will most likely go upstairs by which time it will not be too warm anyway !
Q. Will the Stove Top Fan-C work on my stove at 100 degrees C – it has a back boiler so doesn’t get that hot on top ?
A: We can supply a low temperature version which starts to run at approx 80 degrees C -please use the contact form for more details.
Instructions for the Service of a Fan-C & Fan-Ce
NB – before you start, please note that the TEGs now used are a smaller footprint than previously used. This ensures the entire surface of the TEG is in contact with the base & copper cooler. They are also pre-coated with a thin film of heat transfer material – these two improvements mean the use of gold paste and copper shims is redundant and the fan has a better start up time. However, the down side is the TEGs have to be installed the correct side down. When looking at the TEG wires solder ends toward you , the hot side (down) has the RED wire at left of the TEG. Get it wrong and the life span of the TEG is very much shorter.
This is how I do it and I am right handed.
. Snip both terminal wires at rear of motor ( to replace the old TEG)
. Hold the fan in left hand upside down with a one finger through the gap below the cooler tubes.
. Remove the 4 clamping screws & retain
. Twist the aluminium base off of the TEG & paste / heat transfer film
. Twist the TEG off of the cooler base – there may be a copper shim between TEG & cooler base – remove this also.
. Clean the thermal paste / heat transfer film of each of the metal surfaces & leave them clean – white spirit helps but tissue works fine.
Motor :- replacement
. use the small allen key to undo the grub screw securing the fan hub to the motor shaft. A full turn is more than enough.
. use a flat screw driver blade to gently squeeze the hub from the motor shaft – slide it between motor and small end of the hub & twist
. Unscrew the two outside screws securing the motor mount bracket to the motor stand
. Swap the motor & bracket with the new units & refit the two 10mm long screws – nip them up
. re-fit the fan & hub to the motor shaft – be sure to allow clearance between the hub grub screw and motor fixing screws – otherwise it will prevent the blades spinning or create a ‘ticking’ noise as they clip each other – with the motor facing up, the shaft will drop back into the motor – be sure to leave around 0.5mm space between the hub and motor for clearance.
. Nip up the grub screw on the fan hub with the small hex key provided in the service kit.
Now put the small allen key & motor bracket safe for return to Look Creations.
. Put the motor fan assembly back into position inside the cooler – try to line up the holes at the bottom.
. Place the ali base in line again, pinch with thumb and fore finger to hold the base while you insert the two front clamp screws half way into the motor support casting at the front (fan blade end) – I hold the cooler upside down as before to do this. Once the base is secured loosely put the unit down while you do the next bit.
Inserting the TEG – the new TEGs are slight smaller in surface area and pre-coated with a heat transfer film. When installed the RED wire will come out of the left side and go to the -ve motor terminal. It has to be this way around or the unit will fail due to excess heat . Remember RED LEFT Black Right.
. Pick up the cooler by its fins fan toward your hand – the base should ‘hang’ from the front in such a way to allow you to slide the TEG in between the base and cooler base.
. Trap the TEG between the base & cooler between your thumb below & first finger above & insert remaining 2 screws to the outside of the TEG wires. Wiggle the TEG to ensure it sits fully covered by the copper cooler base contact area.
. Tighten screws CAREFULLY to avoid tilting / pinching and edge of the TEG – take you time corner to corner screws – they are finger tight not a TIGHT white knuckle job. If it goes crunch youve over tightened and bust the TEG (easy done if you are a bit ham fisted like I was). The base has to be snug and not allow it all to slide around that is all.
. You can use the end of the flat screw driver to ‘push’ the TEG around to get it evenly covered – be careful as it is ceramic and can be cracked or chipped with ease.
When its all nipped snug & not crunched…… re-solder the TEG terminals to the motor – the TEG should have its black terminal wire RHS when viewing the fan from the back as it sits – this goes to the +ve terminal on the motor 9this is marked within the base of the motor.
Now if you like – you can run the fan in reverse and sit it on the front of your stove pulling air in, and blowing it out the back onto your stove pipe – this can make the unit more efficient & is worth a try – the air blast pushes air out of the recess around your stove top quite well. Its only a quick re-solder if you want to change it back to standard so may be worth a try !
Hope this all makes sense – please email or call if you run into trouble.
Be gentle on nipping it up – I have bust a few during the first couple of hundred units I assembled – much gnashing of teeth and larger mugs of tea required. It now takes around 15 minutes per unit to service, test and repackage for return – surprising how practice speeds things up !
If possible, I would very much appreciate the return of the old motor mount plate & Hex key – these can be re-used and help keep the costs down.