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Espar / Eberspacher Airtronic D2 12v (2.2kW) Heater Kit

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  • Espar / Eberspacher EasyStart Select Controller - Image 01
  • Espar / Eberspacher EasyStart Timer For Airtronic and Hydronic Heaters 221000341500

The Espar Airtronic D2 Air Heater Kit

Ideal for travelling and camping in high altitudes, this 12V Espar airtronic D2 diesel heater is a powerful and economical heater suitable for a wide range of campervans, caravans, vans and trucks. It can operate at up to 2,200 meters / 7200 feet feet and offers 4 heat output levels, plus an air ventilation mode. Its flexible ducting makes it easy to heat all areas of your vehicle. Espar heaters are among the most popular in the market, and the easy availability of parts and repair shops means installation and maintenance are no hassle at all.

Key features of the Espar D2 Heater Kit 

  • The Espar D2 is a 12V diesel powered heater that operates as a forced air heater.

  • It offers a 2.2kW / 7500BTU heat output and has 4 different heating levels - low, medium, high, and power (boost) - so it is easy to achieve the heat level you want.

  • The Espar D2 diesel heater also has an air ventilation mode for circulating cold air through the ducting system, perfect for cooling your cabin or living area on warm nights.

  • It uses an integrated internal temperature sensor for temperature monitoring. An additional external temperature sensor is available and recommended, as this can be placed in locations like your sleeping area and provides higher accuracy and comfort level.

  • The Espar D2 Heater Kit is simple to install and maintain, and comes with all the necessary parts for installation (see full contents of the kit below).

  • It is also compact, which means it can be installed under the passenger seat, in small compartments within your van or trailer, or externally (external mounting requires additional accessories - our customer support team can help you find these).

  • The Espar D2 Heater Kit can operate in altitudes of up to 2,200 meters / 7200 feet, and can be used at even higher altitudes with an additional High Altitude Kit. 

  • The Espar D2 uses CAN, LIN and S+ system communication protocols which means it is compatible with early generation controllers. So you can use the controller from your previous models of heater with your new Espar D2.

User benefits of the Espar D2 Heater Kit 

The Espar D2 diesel heater is the most reliable and powerful 2kW heater on the market. Diesel powered with a 2.2kW / 7500BTU heat output, it is easy to install and even easier to maintain. What’s more, it is compact, meaning it can be installed under the passenger seat, small compartments or externally (external mounting accessories are required). And beyond convenience, there’s the accuracy of temperature control that you associate with Espar diesel heaters. And for extra accuracy, you can purchase an external temperature unit for your Espar D2 heater that can override the internally mounted temperature sensor to provide you the highest level of temperature control. There are 4 heating levels – low, medium, high, power, and an air ventilation mode to help you cool down your vehicle or living space. The unit also comes with enhanced on screen diagnostics, making it easier for you to catch any issues as they appear. 

What really sets the Espar D2 Heater kit apart from other economical heaters is its ability to be used at high altitudes. Espar’s unique altitude adjustment feature means that it can work at 2200 meters, around 700 meters higher than its competitors, and if you want to use your Espar D2 even higher than that, you can purchase the special High Altitude kit.  And if you are the kind of person who likes to have the ability to finetune your heater kit, you’ll find that the Espar D2 Heater is customisable. As it uses LIN, CAN and S+ technologies, it gives you greater freedom for custom control builds. 

Who the Espar D2 is suitable for

The Espar D2 Heater is the perfect fit, whatever your vehicle. You can use it to efficiently and economically heat your:

  • Truck

  • Van (Sprinter, Promaster, Explorer, Vario, Crafter, Movano, VW BUS)

  • Campervan

  • Caravan

  • Military / Army / Defense / Emergency vehicles

  • Horse box

  • Mobile Workshop

  • Boat (requires marine kit). There is an option to add a marine kit to your order - click here

Heatso’s engineers are here to help

The Espar D2 is an excellent heating option for your vehicle. But if you have any questions about it, or would like to hear about other options, our customer service is onhand to help. And when you do find the ideal solution to meet your needs, our engineers are available to talk you through the whole installation process, step by step.

Technical Data:



Diesel – EN 590

Heat Flow Control







Heat Flow














Fuel Consumption

l / h







gal/ h






Average Power consumption







Average Power Consumption while Starting



Rate Voltage


12 volts

Dimensions LxWxH



Espar / Eberspacher Part Number: 

252675050000 / 25.2675.05.0000 / 25.2675.05.00.00 / 25.2069.05.0000.0Z

25 2675 05 0000 / 25 2675 05 00 00 / 25 2069.05.0000.0Z  

Kit Contents:

  • Espar / Eberspacher airtronic D2 heater

  • Fuel pump (12v)

  • Fuel hose

  • Fuel T piece kit

  • Controller of your choice

  • Exhaust Silencer / Muffler

  • Electrical harnesses

  • Stainless steel exhaust pipe - approx. 90cm

  • Combustion intake pipe 

  • Flexible ducting (60 mm. diameter)

  • Inlet / Outlet grills

  • Air outlet grill (60 mm. diameter)

  • Screws, clips and plastic straps required for installation

  • Installation manual CD

  • Warranty documentation

Shipping Times:

  • United States - 1 Working Day

  • United Kingdom - 1 Working Day

  • Western Europe - 2-3 Working Days

  • Eastern Europe - 3-5 Working Days

  • Scandinavian Countries - 2-3 Working Days

  • Australia / New Zealand - 2-3 Working Days

  • Rest of World - 2-4 Working Days

Please note - New Version D2L S2 is now available! Click here to see.


Installation, servicing and maintenance must be done in accordance with manufacturer’s guidelines. Failure to follow these guidelines will result in voiding your warranty. 

We provide free technical and installation support via email or phone to all of our customers who purchase a heater, heater kit or other products from Heatso. We take pride in our customer service and want to ensure that your heater system is properly installed. As a result, if you have any difficulties, please do not hesitate to contact us at [email protected].

If you require removing and/or refitting your item, please visit a local professional or authorised specialist, if you can not find one you can contact us and we will try to recommend a local partner to assist with the task. The cost of removing and/or refitting this item is not covered by the warranty.

Standard/Premium Warranty Terms for Espar/Eberspacher or Webasto Heaters & Heater kits

2 Years + optional 1 year extended Warranty available

If the item has failed within warrantable conditions:

  1. Please fill out the contact form on the “Contact us” page.
  2. A representative will contact you within 24 business hours to confirm the details and assist you further.
  3. If the product needs to be inspected by our service engineer, we will provide shipping labels for you to print and attach before handing over to our courier for collection.
  4. The shipping label will contain instructions for arranging pickup at your location or drop off at a nearby FedEx location. Follow these instructions to pass the package to FedEx.
    1. *The Label must be attached to the packages before leaving the package with FedEx.
    2. *You can also choose to drop off the item at a FedEx post office instead of requesting a courier collection.
    3. *If after inspection it appears that the item is not warrantable and the malfunction is caused by a non-warrantable condition, we will kindly ask you to cover shipping expenses at a discounted flat rate.
  5. On average, diagnostics of heaters and their parts takes 3 to 4 working days from the moment the item has reached our warehouse.
    1. *The diagnostics report is provided by a manufacturer approved authorised service centre.
  6. If during diagnostics it was concluded that the fault falls under non-warrantable conditions, our customer support will reach out to you and provide you with an estimated repair cost.
    1. *Please note that we strive to provide the lowest possible repair prices.
  7. Under normal circumstances it can take 3-7 working days after diagnostics to repair most minor malfunctions.
    1. *Please note that each case is unique and your repairs may take longer depending on the fault.


*Please note that all deadlines above are approximate and everything depends on the specific details of each case.

**If your item has been installed by a third party, please save all the documentation.This documentation can help find and fix the fault faster.

28 Reviews Hide Reviews Show Reviews

  • 5
    Should have purchased a long time ago, best modification to our camper van!

    Posted by Okienomads on 5th Jan 2020

    Everything came from HeatSo in good shape, super FAST, and install was super easy. Recommend this product to anyone needing efficient, dry heat!

  • 5
    D2 heater. Normal install, no surprises. Puts out a lot of heat

    Posted by Larry on 21st Nov 2019

    Would recommend

  • 5
    Easy to instal

    Posted by Marcelo on 19th Nov 2019

    I installed this air heater in my 2017 Sprinter Van, I found all the parts I needed in the kit. It was easy and it is working fine.

  • 4
    Great but needs extra parts and $$s to be fully usable.

    Posted by Jeremy Meigs on 12th Aug 2019

    First, HEATSO customer support was excellent and the product is amazing once you get it set up and properly wired/working.

    Issues I had are:

    * You need the High Altitude kit if you ever go near the mountains... which is where you usually need the heater! + ~$400 if not on sale...

    * The temperature sensor that comes with the Remote + unit is not usable as a thermostat. It just lets you know the temp. but won't shut off the heater at the desired temp. + ~$50...

    * The Molex Micro-J connectors are a pain to use, small and not initially crimped (which technically needs a tool to properly crimp and another tool to remove if you make a mistake putting them in the housings).

  • 5
    great, reliable heater. good customer service

    Posted by kilohotel on 2nd Oct 2018

    You will receive A LOT of extra parts. Don't be alarmed. Install and wiring is actually pretty simple if you keep in mind that not all parts and wires will be used. The only thing I find frustrating is that there is no reducer hose barb to make the fuel line installation in a newer Sprinter easy. I was unable to find the part locally and had to order online. the only part you should need for a newer sprinter install(one with the fuel tank already tapped) is a 1/4" to 3/16" hose barb to transition from the sprinter fuel line to the Espar fuel line.

  • 4
    D2 Heater kit

    Posted by Scott H on 5th Sep 2018

    I installed a D2 heater in my 2017 Mercedes Sprinter. I chose to install the heater on the driver's side floor, just in front of the rear wheel well. I think this location is much preferred over the passenger seat installation location. The diesel tap from the tank is on the drivers side and it makes in convenient. It is also preferred to be able to have the exhaust on the driver side away from the main cargo door. I was able to install on my own, but I found it a bit challenging. Limited directions are provided and the wiring diagram is a bit intimidating at first. Improved directions would be helpful. I have used the heater for nearly a year and so far so good.

  • 5
    So Happy!

    Posted by Aaron on 20th Nov 2017

    What an amazing heater! Installed in a 170" MB Sprinter and it easily heats the van. Skip the mounting bracket-- I had to cut it down as it is too large to use under the passenger seat. Just use scrap metal as your mounting bracket. Heatso service is 1st class and I received my D2 in Colorado in under two days. Your eyes will glaze over at the wiring diagram the first time you look at it, but after a few YouTube videos, it's actually pretty easy.

  • 5
    perfect for crane cab on Manitowoc M250

    Posted by Frank on 28th Oct 2015

    Very nice unit bought the tank also. Used in a crane cab and its plenty big enough actually it will run you out of it if you leave it on high for long. Easy install could use a better wiring schematic but still no problem. Very satisfied

  • 5
    Superb product & even better service

    Posted by Dan - Samsian Ltd on 23rd Oct 2015

    Dispatch was speedy, price competitive, communications with seller excellent. Would purchase again for sure.