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Arsath



Member Since: 20 May 2015
Location: Sri Lanka
Posts: 133

United Arab Emirates 2010 Defender 110 Puma 2.4 CSW Fuji White
Convert heated seats to cooled ones
Hi I am curious if anyone of you got around to converting a heated seat into a cooled one. I believe defender seats are using the same peltier principle to heat the seat like in any other car. Changing the polarity of the peltier device should turn it into a cooler. All this is possible or am I just letting my imagination run wild..? Has anyone of you thought about it? I live in the tropics so a heated seat is of no use. Thanks in advance for any suggestions.
Post #703143 25th Apr 2018 7:00pm
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wyvern



Member Since: 13 Dec 2009
Location: Cornwall
Posts: 2108

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Firenze Red
I’m not an electrical magician but can safely say that it wont work ... however I will stand corrected if proven wrong ! Laughing

it may be better to look at the later G4 discovery seats as, if my memory serves me correctly, these were a special cool mesh that allowed your back to breath.

the other way is to put ice water into a hot water bottle and place it behind you back like a small cushion ...
just my thoughts !

Thumbs Up Poppy - TDCI (Puma) 110XS 2.2 - Camper conversion - see the build here - https://www.defender2.net/forum/topic56530.html
Elgar -TDCI(Puma) 110XS Dormobile - now sold
Devon & Cornwall 4x4 Response - DC126
Post #703163 25th Apr 2018 7:51pm
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Inigo



Member Since: 13 Nov 2011
Location: Kent
Posts: 617

United Kingdom 2012 Defender 110 Puma 2.2 USW Orkney Grey
I'm fairly sure they are just resistance heaters, having replaced a pad on mine recently. They have a wire snaking through the pad and sit between the foam of the seat and the leather/cloth cover.
Peltier elements appear to be rigid, and I'm not sure you could get any powerful enough and with good enough heat transfer to make a difference. I'm also happy to be corrected and interested to see if you could retro-fit any.
Cooled seats that I've had before have involved a cool air duct from the air conditioning system.
Post #703184 25th Apr 2018 8:39pm
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
Agreed, Defenders just use conventional heater elements, they'll only heat up regardless of which way you run the polarity.
Post #703208 25th Apr 2018 9:39pm
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2526

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black
I don't believe the Defender seats are heated by the peltier effect. I'm sure if they were many of our Antipodean members and dealers would have converted them to cooled seats. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8
Post #703221 26th Apr 2018 5:15am
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Arsath



Member Since: 20 May 2015
Location: Sri Lanka
Posts: 133

United Arab Emirates 2010 Defender 110 Puma 2.4 CSW Fuji White
So does anyone know a good kit that could be used for cooling?
Post #703303 26th Apr 2018 1:15pm
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2526

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black
http://www.aftermarketsystems.net/comfortzonecoolseats.html Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8
Post #703319 26th Apr 2018 2:16pm
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gilarion



Member Since: 05 Dec 2013
Location: Wales
Posts: 5110

Wales 2007 Defender 90 Other CSW Trident Green
I don't know if they still do it but Exmoor used to do seat cover replacements using a fabric that keeps you cool in summer and warm in winter. Don't know if they still do it though, No harm in giving them a call and asking. For those who like Welsh Mountains and narrow boats have a look at my videos and photos at..

http://www.youtube.com/user/conwy1
Post #703344 26th Apr 2018 4:44pm
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Shax



Member Since: 05 Oct 2010
Location: London
Posts: 391

England 2010 Defender 90 Puma 2.4 XS CSW Stornoway Grey
Re: Convert heated seats to cooled ones
Arsath wrote:
Hi I am curious if anyone of you got around to converting a heated seat into a cooled one. I believe defender seats are using the same peltier principle to heat the seat like in any other car. Changing the polarity of the peltier device should turn it into a cooler. All this is possible or am I just letting my imagination run wild..? Has anyone of you thought about it? I live in the tropics so a heated seat is of no use. Thanks in advance for any suggestions.


The seat heaters are definitely not peltier elements...
You could run a liquid system, with a matrix of small bore pipes under the seat fabric, then run these to a cooling block with a pump, peltier module and associated heatsink and fan.. Similar to liquid cooling a computer cpu..
The cooler / fan / pump assembly could be mounted in a box attached to the cubby... And by reversing the polarity of the peltier elements, you keep heated seats in winter!!
Should be a simple enough project to get done in a weekend.. Very Happy Very Happy Very Happy ... ,-------,
.. I [__][_]|__
.. I __ |"_|"__|
.. "(o)====(o)"
^^_-^-_^-^_^^^^^--^^^^
PAUL
G7ALW 14.200 USB
26FB458 / 27.275 SSB
Post #706082 8th May 2018 7:35pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
gilarion wrote:
I don't know if they still do it but Exmoor used to do seat cover replacements using a fabric that keeps you cool in summer and warm in winter. Don't know if they still do it though, No harm in giving them a call and asking.


Outlast IIRC

i have some mesh seats from Exmoor Trim to suit Defender which work really well. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #706098 8th May 2018 8:17pm
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