![]() | Home > Maintenance & Modifications > Webasto Airtop - Installation Options |
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jonny Member Since: 10 Mar 2013 Location: North Wilts Posts: 182 ![]() |
Hi All
I've just purchased a Webasto Airtop to go in my TD5 (courtesy of Racedriver on here), so next stop is to look at fitment options... It looks like the usual place to fit them is under the cubby, and Mudstuff and Nakatanenga make boxes specifically for this: https://www.mudstuff.co.uk/products/mud-he...&_ss=r https://www.4x4overlander.com/product/naka...console-2/ The mudstuff one is cheaper, but the Nak one appears to be better thought out, with mounts for vents etc. Other than DIY, are there any other options? Another question - both of those lockers mount the heater with the air inlet at the front, heat output at the rear. Am I missing something - could the webasto be flipped round to blow towards the front, as I'd predominantly want it to heat towards the front seats? Cheers Jon |
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GeorgeE Member Since: 10 Feb 2025 Location: Wanborough Posts: 15 ![]() ![]() ![]() |
"My heater is fitted under the rear seats in my 110. "
Do you have any pictures of this? I have a spare Eberspacher and a 110 station waggon - I'm keen to have the two of them make friends. I've heard of people putting them under the back seats and that seems a good idea but I couldn't work out how to do it and route the exhaust. |
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excossack Member Since: 22 Feb 2012 Location: North West Posts: 5920 ![]() ![]() ![]() |
Not to hand.
The heater sits under the rear seats - air intake points towards the door and the heat outlet points to the other drivers side rear door. Metal foil pipe curves away from the heater and exits under the rear seats. The exhaust and combustion pipe works exits through the floor (does mean drilling the floor) The combustion intake with filter sits on the chassis rail and the exhaust comes out under the wheel arch. 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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excossack Member Since: 22 Feb 2012 Location: North West Posts: 5920 ![]() ![]() ![]() |
I lied. Found this on the forum
https://www.defender2.net/forum/topic90392.html?highlight=heater 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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GeorgeE Member Since: 10 Feb 2025 Location: Wanborough Posts: 15 ![]() ![]() ![]() |
Fantastic, thanks
![]() Sorry, more questions... Where did you get the under bonnet fuel tank from and roughly how long does it last? |
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excossack Member Since: 22 Feb 2012 Location: North West Posts: 5920 ![]() ![]() ![]() |
Not Raynet, but amateur radio / rally radios connections.
Fuel tank was Ebay and easily lasts while. I have used for a few hours at a time on car rallies etc I would easily expect a full weekend. Its around 5 litres. The fuel pump is located just below the tank, on the inner wing, so its kinda gravity fed into the filter and then the pump 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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GeorgeE Member Since: 10 Feb 2025 Location: Wanborough Posts: 15 ![]() ![]() ![]() |
Thanks - given me a good head start on doing this
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excossack Member Since: 22 Feb 2012 Location: North West Posts: 5920 ![]() ![]() ![]() |
Whether or not its the best way, not sure, but it works for me 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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34064 Member Since: 12 Dec 2023 Location: South Central Posts: 225 ![]() ![]() ![]() |
I have just finished my installation of my Webasto Airtop 2000s that came with my 110 from the factory as originally it was mounted in the rear tub by the bulkhead but i have removed it and put it in a mud stuff box under the cubby. i have it facing with the heat out the back as mine will be used while camping and i have made a duct and box that goes behind the cubby with a 360 degree rotating vent after 3 minutes of it being on its absolutely roasting in the cab so i only have it on for a few minutes then turn the burner off and just use the fan to blow whats left in the heat exchanger out which gives me another 20 minutes of heat. You could rotate it around to warm the front up it would also be easier keeping the fuel in away from the exhaust. 110 Td5 Ex Utilities slowly converting into a pop top camper one day
Build thread:https://www.defender2.net/forum/post1024784.html#1024784 |
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revd Member Since: 20 Apr 2024 Location: England Posts: 216 ![]() ![]() |
Eberspacher between the seats with Mudstuff box under the cubby - fuel pick up using a collar from Butler Technik, heater control in the cubby means no wires under the tunnel or holes in the dash. Heater blows out through the bulkhead but soon warms footwells.
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GeorgeE Member Since: 10 Feb 2025 Location: Wanborough Posts: 15 ![]() ![]() ![]() |
I like the idea of the separate fuel tank, I don't want to cut into the fuel line (having in the past spent hours tracking down where air was getting into a diesel line my view is the fewer opportunities for that to happen the better). I like the filler neck option but I have the extra range fuel tank so can't do that. I did see the other option of putting a pot in the diesel return line which I liked and may well look into. The heater under the cubby box would be fine other than the fact at the moment the padded top is exactly the right height to act as an armrest so don't really want to change that, under the back seats is out of the way enough and sufficiently covered in that it is protected from stuff being lobbed in the back footwell. |
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bodstruck Member Since: 09 May 2020 Location: Wiltshire Posts: 972 ![]() ![]() |
You can replace the main outlet on the heater with a 4 way one. There is enough room (just) in the heater boxes to run 42mm flexible hose to both the front and rear of the box so you can have outlets both sides.
I don't have pics to hand but the outlet is like this one: https://www.ebay.co.uk/itm/375861735071?mk...media=COPY and the vents: https://www.ebay.co.uk/itm/186517468966?mk...media=COPY I have gathered all the parts but yet to fit. Fuel tank will be under the bonnet, heater and vent pipework in a mudstuff under cubby box with 2 swivel outlet vents both front and back. Combustion air inlet will be routed as high as I can get it under the bonnet and the exhaust will exit to one side with a silicone cap on the end to keep water out if wading (to be removed when is use ![]() |
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jonny Member Since: 10 Mar 2013 Location: North Wilts Posts: 182 ![]() |
Thanks - good feedback... Are you planning on putting extra holes in the mudstuff locker for the additional vents? It seems that the Nak' locker is considerably more expensive and is going to be special order, so maybe the mud one is going to be quicker/easier if it's easy enough to add the extra vents in...
Any thoughts on why both of them blow air to the rear - is it because most people want to heat the back for camping etc, rather than any kind of technical requirement? |
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barbel jim Member Since: 12 Dec 2012 Location: Northants Posts: 1435 ![]() ![]() ![]() |
I used the mud stuff locker,
![]() Click image to enlarge But swung the heater 180 degrees so it blows out the front. Fundamentally because I can’t stand cold feet ![]() ![]() ![]() ![]() Click image to enlarge ![]() Click image to enlarge ![]() Click image to enlarge ![]() Click image to enlarge |
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