Diesel Heater Advice

Discussion in 'General VW T6 Chat' started by James1982, 14 Oct 2019.

  1. James1982

    James1982 Member

    Hi
    I am just working out options of the inlet and outlet for the diesel heater. Done loads of reading on here , foot step for intake , under seat for outlet and the factory option in the b pillar. I have a leisure battery under my drivers seat and don`t really want to go down the b pillar route. So is there a reason why i couldn't put the outlet in the door foot step and leave the intake under the vehicle with say a high flow car air filter fitted to protect the heater? This there for using fresh air from outside. I understand it would not have the recirculating option or would this just pick the fumes up from the diesel heater exhaust? (maybe extend the exhaust on the diesel heater to the back of the van)
    Thanks in advance.
    James
     
    Last edited: 14 Oct 2019
  2. oldiebut goodie

    oldiebut goodie Senior Member VIP Member T6 Guru

    If you use fresh air you could be in the position in winter of having to heat the -10° outside air to +20° instead of +10° to +20° - which is more efficient use of that expensive road fuel? You could well be using very moist air from outside some of the time also, at least with recirculated air the moisture level will be virtually constant.
    I installed my heater underneath using the step intake but ran two outlets to the middle of the van, one blowing forwards to the cab and the other blowing aft to the shower room. It doesn't have to be the B-pillar or driver's seat base.
    Depending upon your vans internal layout and size of heater envisaged consider mounting the heater internally rather than underslung.
     
  3. James1982

    James1982 Member

    I have a titan rock and roll bed intalled, as it has to be easily removable for my motorbikes to go in. I also have a double passenger seat swivel fitted. The way my van is used camping and bike transport it limits my options. I was thinking of using a eberspacher 2kw, has this the ability to heat a low outside air temp even if does use a little more fuel?.
    Thanks
    James
     
  4. oldiebut goodie

    oldiebut goodie Senior Member VIP Member T6 Guru

    Personally I would use a 3.5 or 4Kw heater if using a fresh air intake. I fitted a 4Kw to mine anyway as I had a couple to hand. But then I have a hightop.
    How about just having the outlet through the floor just behind the driver's seat? You might have to replace the outlet grill occasionally due to breakage if broken accidentally.
     
  5. James1982

    James1982 Member

    motorcycle wheel chocks and thats where the dog sleeps ha ha ha. Are the 4kw heaters alot bigger in size? Is there any route to getting in behind the panels from underneath? say the panel under the window on the non sliding door side?
     
  6. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    What about an outlet at the sliding door step? That way it’s towards the rear and well out of the way, and you get to keep your inlet at the front step. I don’t know what the panel work is like there.
    There’s the option of having the inlet at the drivers step and the outlet at the passenger, too, but that might not result in a good air circulation.
     
    James1982 likes this.
  7. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    There’s not much room there at all - the bottom depth is very narrow.
     
  8. James1982

    James1982 Member

    Yeah never thought of the sliding door step, would there be room to run ducting under the van?
     
  9. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    I’m not 100% sure with the tank being against the nearside, so check underneath before you commit. But the passenger side step should still be ok, even with an AdBlue tank (I’m assuming you’ve got a Eu6 engine).
     
  10. James1982

    James1982 Member

    Its not AD blue, thanks for the idea s, i will investigate the routing and sliding door step as this would give good re circulation.
     
  11. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    If you’ve not got AdBlue then the best option would be to fit the heater underneath your passenger seat, as there’s a big void there where one of the OEM heaters would fit (Thermo Top?). That would allow you to vent out of the rear of the passenger seat, missing any kitchen furniture that you may install in future.
    If you’ve got a swivel double-seat then that will prevent that outlet being there, though.

    But looking back at the leisure battery placement - my outlet runs alongside my LB under the drivers seat - the battery sits side on (running front to back) and the pipe fits nicely beside it, with no heating of the battery occurring.
    Or you could mount the battery underneath the van if it’s taking up precious room?
     
  12. James1982

    James1982 Member

    yeah double swivel fitted and 110ah leisure battery fitted under drivers side. Going to look into external mount drivers side , inlet drivers step and see if i can route the ducting to the sliding door.
     
  13. James1982

    James1982 Member

    have you any pics of your LB and pipework?
     
  14. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    They may say that the run from the drivers seat to the sliding door is too long and it’ll cause heat loss. I don’t know. It’s worth asking.
    If that’s the case then mount the heater under the passenger seat, which’ll shorten the run.

    If the slider is a no-go then have the heater and the outlet under the drivers seat and mount your battery sideways, and it should fit.

    I haven’t got any photos of mine, but it’s a 110 Xtreme so it’s a decent size.
    My heater inlet is in the drivers step.
     
  15. James1982

    James1982 Member

    yeah i have the same battery with ctek charger and a little fuse box under there.
     
  16. Ads_Essex

    Ads_Essex Local lowlife VIP Member T6 Legend

    Map
    I couldn’t fit my Ring under there because of its size, but your CTEK will fit beside a LB and the heater outlet.
    You may have to resite your fuse box - maybe make up a panel and mount it to the front of the seat, or take off the side pocket and mount it there?
    The van is back with the joiner, but when I’ve got it back I’ll take some photos.
     
  17. James1982

    James1982 Member

    Many thanks
     
  18. oldiebut goodie

    oldiebut goodie Senior Member VIP Member T6 Guru

    I wouldn't worry about the heat loss running the duct across the van, I would be more concerned about routing avoiding the exhaust etc.
    Quick calculation of resistance points for installation of a Webasto Air Top 2000ST 2Kw heater with the ducting running across to the nearside would give you less than 100 points and the max is 325 points so no pressure problems with that. ( I only deal with Webastos but expect that the Eberspächer would be roughly the same ) 5m of ducting would be fine!

    Inlet and outlet together in the same step is a no-no.

    If you have clear space underside under the passenger seat that is the obvious site - I assumed that you would have the tank there. No need for step intake or worries about outlet with an under seat installation then.
     
  19. James1982

    James1982 Member

    That's great thanks for the info. I will looking into the routing for the sliding door step. Keen on this idea because when I have airbeam awning up the sliding door can be left open and blow a little hot air into that.
     
  20. James1982

    James1982 Member

    Also seen you can buy an insulating sleeve for the ducting to help with any heat loss
     

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