---
product_id: 480175430
title: "Eberspacher Espar Airtronic Heater Kit AS3 D2L (Diesel) 12V Upgraded Version of The S2 D2"
brand: "eberspächer"
price: "383573 kr"
currency: ISK
in_stock: true
reviews_count: 8
category: "Eberspächer"
url: https://www.desertcart.is/products/480175430-eberspacher-espar-airtronic-heater-kit-as3-d2l-diesel-12v-upgraded
store_origin: IS
region: Iceland
---

# 2kW / 6824 BTU max heat output Operates down to -46°C / -50°F Works up to 18,000 ft altitude Eberspacher Espar Airtronic Heater Kit AS3 D2L (Diesel) 12V Upgraded Version of The S2 D2

**Brand:** eberspächer
**Price:** 383573 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your ride’s comfort—heat smarter, not harder!

## Quick Answers

- **What is this?** Eberspacher Espar Airtronic Heater Kit AS3 D2L (Diesel) 12V Upgraded Version of The S2 D2 by eberspächer
- **How much does it cost?** 383573 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/480175430-eberspacher-espar-airtronic-heater-kit-as3-d2l-diesel-12v-upgraded)

## Best For

- eberspächer enthusiasts

## Why This Product

- Trusted eberspächer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extreme Condition Ready:** Engineered to perform flawlessly from arctic chills to high-altitude adventures up to 18,000 ft.
- • **Whisper-Quiet Operation:** Brushless fan & stepless blower system ensure cozy warmth with minimal noise disruption.
- • **Powerful & Compact Heating:** Delivers robust 2kW heat in a sleek, under-seat design—comfort without compromise.
- • **Plug & Play DIY Installation:** Simplified setup with fewer tools and adaptable ducting up to 49ft—perfect for the hands-on pro.
- • **Smart Compatibility & Longevity:** Supports CAN, LIN, S+ protocols with 5,000-hour lifespan and advanced fault diagnostics for peace of mind.

## Overview

The Eberspacher Airtronic AS3 D2L is a cutting-edge 12V diesel heater delivering 2kW (6824 BTU) of heat with a compact design ideal for under-seat installation. Built for extreme environments, it operates reliably down to -46°C and up to 18,000 ft altitude without extra wiring. Featuring a whisper-quiet brushless fan, stepless blower, and plug & play installation, it offers versatile ducting options and compatibility with multiple communication protocols. With a 5,000-hour service life and enhanced diagnostics, it’s engineered for durability and seamless integration in professional-grade vehicles.

## Description

The Eberspacher Airtronic AS3 D2L is the brand-new diesel heater on the market, offering 2kW / 6824 BTU maximum heat output. This power, combined with the D2L’s advanced features and engineering, makes it one of the best 2kW diesel heaters on the market. An upgraded version of the Airtronic S2 D2.

Review: The console is too small to see. - It works as described, and it works as I expected. The problem is it will not shut down when the temperature is reached. The console is too small to see.
Review: Super! - After watching YouTube videos I was a bit concerned about it being a tough DIY addition to our Sprinter, but it was all reasonable. The key is to understand that you need to treat the installation as 3 separate install sub- systems: The physical install of the furnace, the install of the electrical system, and plumbing the fuel line. Yes, it takes a few days if your van is all built out like ours was. The vendor was very responsive to my questions and provided YT links, that I ended up not needing after. The kit was complete, I didn’t need any other parts of any kind. The link to the Espar manual provided sufficiently clear instructions that were further clarified by the vendor’s info. There were some minor leftover parts, mostly related to the unused fuel siphon tube, that were unneeded because MB provides a ready to go T-connect for this very purpose. While the YT installers were all concerned about the exhaust placement due to potential fumes coming in the sliding door, I find the furnace is using so little fuel that the fumes are barely noticeable, and I am quite sensitive to the smell of diesel exhaust. That said, we used it in mild temps only down to about 41°, so in colder temps where the furnace would need to run more and harder, the fumes might be more noticeable. So, if you decide to run the outlet over to the driver’s side, then you will need to procure more exhaust pipe, either the expensive stainless or cheaper galvanized version because the supplied pipe is about 12” too short to go far enough to exit the fumes out from underneath the van. That said, if enough fumes were being discharged to be a problem by the sliding door, my guess is that they would be nearly as unpleasant on the driver’s side as they would drift back to our rear open window. At least the slider gets closed and sealed shut once we retire for the night, so fumes are only possible when the slider is opened and closed for some brief outside need. Sprinters: There is a diagonally oriented flat depression formed in the floor pan specifically for these heaters, which simplifies the installation of the Espar, if the stock MB additional “house” battery is removed. We replaced our MB auxiliary battery with a 100AH slimline LiFePO battery, so there was plenty of room for the battery, furnace, and a MPPT charge controller for the new battery. Without a doubt the most difficult and stressful part of the installation was cutting the hole in the floor. I wisely opted to use a drill-powered sheet metal nibbler I ordered from desertcart. With the nibbler I was able to cut a close-tolerance oval hole that matched the rubber foot of the furnace. Using the diagonal placement allows the use of the included square floor plate and gasket. The plate allows a sloppily cut floor hole to adequately covered and sealed, which means a mostly square cut can be made easily with a Sawzall type tool. Using the plate also aids the connection of the tubes and pipes from inside the van, rather than from underneath, so I recommend using the plate. That said, using the plate and having a big hole can create a significant water trap that will need well executed sealing from under the van. 26-0123 UPDATE: If installing the heater on the passenger side of the vehicle, the fuel line will have to cross the catalytic converter’s path, so one must be extremely careful to take a path with the plastic (nylon?) fuel line that is as high as possible and as far as can be managed from the Cat. I ran our line along where one of the cross-beams is welded to the floor and this was to the rear of the Cat. I periodically check the installation for signs of discoloration or distortion in the line.

## Features

- The Eberspacher Airtronic AS3 D2L is the brand-new diesel heater on the market, offering 2kW / 6824 BTU maximum heat output. This power, combined with the D2L’s advanced features and engineering, makes it one of the best 2kW diesel heaters on the market.
- Compact design for convenient installation, i.e. Under passenger seat. Airtronic D2L is the same size as the AS3 B2L but smaller in size than B4L.
- The Eberspacher D2L is engineered to operate in extreme conditions and high altitudes. It can operate in temperatures as low as -46°C / - 50°F and at altitudes of up to 18K feet. This is possible thanks to its integrated altitude sensor, and unlike earlier models there is no additional wiring or installation required for high altitude operation.
- Controlling the heater is simple because it has an integrated temperature sensor. The Eberspacher D2L’s stepless blower system enables optimized heating control and maximizes performance efficiency.
- The stepless blower system also ensures quieter performance compared to previous models, while the dampened fuel pump piston reduces clicking noise. The Eberspacher D2L also sports a brushless fan which helps to further reduce noise.
- The Eberspacher D2L is highly versatile when it comes to installation. Its adaptable ducting system, which can go up to 15 meters / 49ft in length, features outlets of either 60mm or 75mm. Ducting outlets are closable and can have different degree grilles and outlet types, plus the number of outlets can be varied based on the complexity of the ducting system.
- The Eberspacher D2L is easier to install than previous models. It features plug and play installation which requires fewer tools, enabling DIY installation.
- The heater’s fuel system plugs directly into your vehicle’s fuel system or tank with a standpipe or via an auxiliary tap (if your vehicle manufacturer offers one). Installation of the fuel system has been simplified for this model, with the same line used for the whole installation.
- The Eberspacher AS3 D2L is compatible with all 3 communication protocol technologies used by Eberspacher - CAN, LIN and S+. This means you can use your earlier generation controller with the Eberspacher D2L
- The brushless fan ensures the Eberspacher D2L has a long operating life, increasing service time from 3k hours (on previous models) up to 5k hours. And if there are any issues, the new controller communication system allows more accurate on-screen fault diagnostics. Start up power consumption has been reduced compared to previous models.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BGYH9WVD |
| Best Sellers Rank | #94,117 in Automotive ( See Top 100 in Automotive ) #40 in RV Heaters & Furnaces |
| Brand | Eberspächer |
| Customer Reviews | 4.2 4.2 out of 5 stars (28) |
| Date First Available | September 30, 2022 |
| Item Weight | 17.41 pounds |
| Item model number | 2773SW |
| Manufacturer | Eberspacher |
| Manufacturer Part Number | 25.2953.05.0000.0B |
| Model | Eberspacher Heater |
| Package Dimensions | 22.5 x 14.88 x 8.25 inches |

## Images

![Eberspacher Espar Airtronic Heater Kit AS3 D2L (Diesel) 12V Upgraded Version of The S2 D2 - Image 1](https://m.media-amazon.com/images/I/81lwS9Y28tL.jpg)

## Questions & Answers

**Q: Should I use a CO2 monitor with this heater?**
A: Hi Bennie,
The Espar and similar heaters normally burn diesel quite efficiently. The combustion loop is entirely separate from the heating loop and exhausts so the risk is minimal. 
Danick

## Customer Reviews

### ⭐⭐⭐⭐⭐ The console is too small to see.
*by S***O on December 17, 2025*

It works as described, and it works as I expected. The problem is it will not shut down when the temperature is reached. The console is too small to see.

### ⭐⭐⭐⭐⭐ Super!
*by E***N on June 9, 2025*

After watching YouTube videos I was a bit concerned about it being a tough DIY addition to our Sprinter, but it was all reasonable. The key is to understand that you need to treat the installation as 3 separate install sub- systems: The physical install of the furnace, the install of the electrical system, and plumbing the fuel line. Yes, it takes a few days if your van is all built out like ours was. The vendor was very responsive to my questions and provided YT links, that I ended up not needing after. The kit was complete, I didn’t need any other parts of any kind. The link to the Espar manual provided sufficiently clear instructions that were further clarified by the vendor’s info. There were some minor leftover parts, mostly related to the unused fuel siphon tube, that were unneeded because MB provides a ready to go T-connect for this very purpose. While the YT installers were all concerned about the exhaust placement due to potential fumes coming in the sliding door, I find the furnace is using so little fuel that the fumes are barely noticeable, and I am quite sensitive to the smell of diesel exhaust. That said, we used it in mild temps only down to about 41°, so in colder temps where the furnace would need to run more and harder, the fumes might be more noticeable. So, if you decide to run the outlet over to the driver’s side, then you will need to procure more exhaust pipe, either the expensive stainless or cheaper galvanized version because the supplied pipe is about 12” too short to go far enough to exit the fumes out from underneath the van. That said, if enough fumes were being discharged to be a problem by the sliding door, my guess is that they would be nearly as unpleasant on the driver’s side as they would drift back to our rear open window. At least the slider gets closed and sealed shut once we retire for the night, so fumes are only possible when the slider is opened and closed for some brief outside need. Sprinters: There is a diagonally oriented flat depression formed in the floor pan specifically for these heaters, which simplifies the installation of the Espar, if the stock MB additional “house” battery is removed. We replaced our MB auxiliary battery with a 100AH slimline LiFePO battery, so there was plenty of room for the battery, furnace, and a MPPT charge controller for the new battery. Without a doubt the most difficult and stressful part of the installation was cutting the hole in the floor. I wisely opted to use a drill-powered sheet metal nibbler I ordered from Amazon. With the nibbler I was able to cut a close-tolerance oval hole that matched the rubber foot of the furnace. Using the diagonal placement allows the use of the included square floor plate and gasket. The plate allows a sloppily cut floor hole to adequately covered and sealed, which means a mostly square cut can be made easily with a Sawzall type tool. Using the plate also aids the connection of the tubes and pipes from inside the van, rather than from underneath, so I recommend using the plate. That said, using the plate and having a big hole can create a significant water trap that will need well executed sealing from under the van. 26-0123 UPDATE: If installing the heater on the passenger side of the vehicle, the fuel line will have to cross the catalytic converter’s path, so one must be extremely careful to take a path with the plastic (nylon?) fuel line that is as high as possible and as far as can be managed from the Cat. I ran our line along where one of the cross-beams is welded to the floor and this was to the rear of the Cat. I periodically check the installation for signs of discoloration or distortion in the line.

### ⭐⭐⭐⭐ Easy install but loud during operation
*by G***. on January 1, 2026*

Easy install once I found the seven o savage video. Warms the van pretty quickly. Louder than I expected. Not the most intuitive UI on the thermostat

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-08*