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Espar D2 Diesel Heater Installation

As we head into the winter months, the most important new modification to our van is the Espar D2 Diesel Heater installation to ensure we stay nice and toasty on our snowsports adventures.


This is the parts list to set up our heater exactly as we have it:


Since we will be spending a lot of time this winter in the mountains for ski season, we needed a safe, effective way to heat our van in the winter. We had previously installed insulation in our campervan when we originally built it, but there was no heat source for the living space of the van. We chose the Espar D2 Diesel heater, which runs off of the on-board diesel tank that the van’s engine runs off of. Our 2007 Dodge Sprinter has an auxiliary fuel line, which makes running the fuel for this heater a breeze.

Heating a campervan in the winter


We chose to install the Espar D2 Heater under the passenger seat of our campervan. This seemed the most logical place to install it, as it was out of the way and easy to access by removing the passenger seat. If you are unsure as to how to remove the seats, check out our video HERE. The rubber mount from the bottom of the heater made a great template for drilling the holes in the bottom of the van.

Before starting the Espar D2 Diesel heater installation, we laid everything from in the box out as if it were installed so that we could ensure we had all the right parts. This proved to be very helpful in moving things along quickly.


We found out the hard way that there is very minimal information available on the wiring of the Espar D2 heater, and much of that information is in German. Since we had to piece it together from multiple sources, we have included a custom made wiring diagram of exactly what we did which you can find at the top of this page.


Once your Espar D2 Diesel heater is completely installed, you’ll need to allow the heater to cycle a few times to prime the line. When you first turn on the heater, it will click a few times and cycle through with the fan on, but no heat. If the thermostat reads an error, don’t be alarmed: this is normal. Just disconnect the power to the heater via the fuses, wait a few seconds, then reconnect the power. You may need to do this 4-5 times before the heater is fully primed and kicks on.


We’ve had this Espar D2 Diesel heater installed for a few days now and so far we are happy with the outcome. After a while of living in cold weather with this setup, we will do a full review of the heater. Let us know if you have any questions about our Espar D2 Diesel heater installation!

richard a. currie

Wednesday 3rd of March 2021

Nate, did you consider using a radiant/convection propane heater (e.g., the Olympian Wave) instead of diesel heater? these heater do not use any electricity and make no noise. regards, Richard

dolores leow

Thursday 10th of December 2020

hi may name is Dolores and live in my van. can you install it in my van and for how much including parts and labor? im living in my van with out a heater and it gets really cold. thank you

Nate Yarbrough

Thursday 10th of December 2020

Hey Dolores! I teach people how to do this stuff themselves. I do not offer installation services. Sorry about that!

Tyler Abell

Sunday 19th of January 2020

Hey Nate! Thanks for the post and video has been helpful. Only issue I’m having is I have a petrol 2019 ford transit. I don’t have an aux fuel line. Iv see videos of people Installing the six fuel line on a diesel sprinter where you have to remove the whole tank and there is an extra outfeed from the fuel tank pump. Do I need to do this?

Can I just tee off the existing gas line that is already coming out of my tank to my engine?

What’s the purpose of the fuel stand pipe? I don’t see anyone installing these?


Saturday 4th of January 2020

This wiring diagram you have is fucking terrible and misleading. I followed it and ended up plugging in the altitude sensor backwards. I hope your van gets broken into


Wednesday 20th of March 2019

Does the Espar D2 heater have the capability of heating water too? I am buying a van that already has a D2 installed but want to have aux water to take showers out the back.

Nate Yarbrough

Wednesday 20th of March 2019

There are a few hacks around for heating water with it, but the D2 does not have water heating built into it.