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Autoterm Air 4D: Expert Guide to Installation and Benefits

The Autoterm Air 4D is a versatile and efficient diesel-powered air heater, designed to provide comfort and warmth in low-temperature environments. This compact heater unit is a popular choice among semi truck drivers due to its convenience and reliability. Drawing fresh air from outside, the Autoterm Air 4D rapidly heats the air, creating a cozy atmosphere in various types of vehicles and spaces.

Autoterm heater buy

Equipped with built-in fail-safe systems and sensors, the Autoterm Air 4D ensures the safety and comfort of users while minimizing energy consumption. With its quick heating ability, it is an ideal solution for those who require heating in spaces without built-in central heating systems, such as campers, boats, and other recreational vehicles. In addition to its outstanding performance, this air heater is known for its ease of installation and user-friendly operation.

Overall, the Autoterm Air 4D offers an effective and dependable heating option for those who need warmth on the go. By combining top-notch performance features with ease of use and safety, it stands out in the market as an exceptional choice for heating cabins.

Understanding Autoterm Air 4D

The Autoterm Air 4D is a popular diesel-powered air heater designed for a variety of applications, such as vans, campers, trucks, off-highway vehicles, and boats. This heater has a heating power of 4 kW and can operate on both 12V and 24V systems. It quickly heats up the fresh air drawn from the outside or a well-ventilated room, providing comfort and warmth during cold seasons.

One of the key features of Autoterm Air 4D is its high altitude sensor that allows the heater to operate optimally at various altitudes. It has a control unit with the sensor to ensure efficient performance irrespective of the location. The heater is designed to support the Ø 90 mm air pipe assembly (assy. DE015). However, an additional adapter like P5313 is needed to connect it to the air inlet or outlet.

Here's a brief summary of the Autoterm Air 4D specifications:

  • Heating Power: 4 kW
  • Fuel: Diesel
  • Voltage: 12V / 24V
  • Applications: Vans, Campers, Trucks, Off-Highway, Boats/Yachts

When it comes to the installation, the manufacturer provides a comprehensive user manual that guides through the process and safety precautions. It is always advisable to follow the guidelines provided by the manufacturer to ensure proper functioning and safety.

Considering its flexibility, efficiency, and heating capabilities, the Autoterm Air 4D is an ideal choice for various vehicle types and marine applications. Besides providing warmth during cold seasons, this heater enhances the overall comfort and experience of the user in their vehicle or boat.

Installation and Setup

Site Selection

When installing the Autoterm Air 4D, it's important to choose an appropriate location for efficient and safe operation. Carefully consider airflow, safety clearances, and accessibility for future maintenance. Ensure the heater is mounted horizontally on a stable surface, and sufficient space is available for air intake and exhaust pipes. Avoid positioning the heater near heat-sensitive components or materials.

Kit Components

The Autoterm Air 4D kit includes essential components for installation:

  • Air Heater: This diesel-fueled heater comes with a voltage of 12V or 24V.
  • Control Unit: Features a high-altitude sensor for optimal performance.
  • Fuel Pump: Supplies diesel fuel from the vehicle's fuel tank to the heater.
  • Air Inlet and Outlet Pipes: For proper airflow, routing, and adapters (P5313 and P2423) for connecting Ø 90 mm air pipes.

Refer to the User's Manual and Installation Instructions for a comprehensive list of components and their functions.

Initial Setup

To set up the Autoterm Air 4D, follow these general steps:

  1. Connect the heater to the power supply: Wire the heater unit correctly to the vehicle's electrical system, ensuring the voltage matches the heater's requirements.
  2. Install the fuel pump: Mount the fuel pump at a suitable location with a slight incline to prevent air from entering the fuel line.
  3. Connect fuel lines: Attach the fuel lines between the fuel pump, heater, and vehicle's fuel tank according to the instructions.
  4. Route air pipes: Install the air inlet and outlet pipes, ensuring proper clearance and positioning. Use adapters for Ø 90 mm air pipes when necessary.
  5. Mount the control unit: Place the control unit at a comfortable and convenient location within the vehicle, and connect it to the heater.
Autoterm (Planar) air 4d diesel heater

For detailed instructions and diagrams, consult the User's Manual and Installation Instructions. Adhering to the guidelines ensures proper installation, better heating performance, and safe operation of the Autoterm Air 4D.

Operating Autoterm Air 4D

Automatic Mode

In the Automatic Mode, the Autoterm Air 4D heater will automatically adjust its heating performance based on the ambient temperature. To enable this mode, you simply need to turn on the heater, and it will take care of the rest. The device intelligently adapts its performance to maintain a comfortable temperature inside your vehicle, camper, or boat. For more specific information on the Automatic Mode, you can refer to the user manual.

Manual Mode

If you prefer more control over your heating experience, the Manual Mode lets you adjust the heater's output according to your needs. In this mode, you can manually set the desired heating power and fan speed. This may be useful for specific situations when you want the heater to run at a certain temperature or provide a certain amount of airflow. For details on how to switch to Manual Mode and adjust the settings, consult the user manual.

Temperature Adjustment

Adjusting the temperature of the Autoterm Air 4D is easy and straightforward. In both Automatic and Manual Modes, you can use the control unit to set your desired temperature. The heater's control panel typically displays the current temperature and allows you to increase or decrease it according to your comfort level.

For example, you may encounter the following options on the control unit:

  • + button: Increases the temperature
  • - button: Decreases the temperature

It is important to remember that the Autoterm Air 4D is designed to regulate its performance to achieve the set temperature, so you can expect smooth and efficient operation. For more information on temperature adjustment and other features, consult the user manual.

Maintenance of Autoterm Air 4D

Regular Tasks

To ensure the optimal performance of your Autoterm Air 4D heater, it's crucial to perform regular maintenance tasks. Cleaning the air filter: The air filter should be cleaned once every two months to prevent dust and debris buildup. You can find instructions on how to clean the filter in the user's manual.

Checking fuel lines and connections: Regularly inspect the fuel lines, fuel filter, and connections for any leaks or damage. If any issues are found, consult an authorized service center for assistance.

Seasonal Tasks

In addition to the regular tasks, there are also specific maintenance tasks that should be performed seasonally.

Winter preparation: Before the cold season starts, ensure that the heater is functioning correctly by conducting a test run. Check the exhaust system for any leaks, damages, or blockages.

Summer storage: If you're not using the heater during the warmer months, it's essential to prepare it for storage. Disconnect the battery, clean the air filter, and empty the fuel filter as mentioned in the user manual.

Problem Indications

Watch out for certain indications that may point to a problem in the heater's operation. Some of these signs include:

  • Difficulty in starting the heater
  • Heater shutting off unexpectedly
  • Unusual noises during operation
  • Persistent odor or excessive smoke

When encountering any of these issues, it is crucial to consult an authorized service center or refer to the troubleshooting section in the user manual to diagnose and resolve the problem.

Concluding Remarks

The Autoterm Air 4D is a versatile and efficient diesel-powered air heater suitable for use in various types of vehicles and marine applications such as vans, campers, trucks, boats, and yachts1. With a heating power of 4 kW, it can easily be retrofitted in almost any vehicle, providing ample warmth and comfort2.

This air heater is available in both 12V and 24V options, ensuring compatibility with a wide range of power setups3. One of the defining features of the Autoterm Air 4D is its built-in high altitude sensor, which allows it to function seamlessly at altitudes of up to 2500 meters4.

Autoterm (Planar) air 4d

Included with the heater is a PU-28 touchscreen controller, which allows for easy control and management of the device's operation4. Installation of the Autoterm Air 4D is relatively straightforward, thanks to the full installation kit provided when purchasing the heater2.

In summary, the Autoterm Air 4D is:

  • Efficient and powerful with a heating capacity of 4 kW1
  • Suitable for a wide range of vehicles and marine applications2
  • Equipped with a high altitude sensor for improved performance at higher elevations4
  • Compatible with both 12V and 24V power setups3
  • Comes with a PU-28 touchscreen controller for ease of use4

For those in need of a reliable and efficient diesel-powered air heater, the Autoterm Air 4D is a solid choice, offering the technical specifications and flexibility to meet various heating needs.


  1. https://autoterm.com/autoterm-air-4d 2

  2. https://nomadicsupply.com/autoterm-air-4d-camper-van-marine-diesel-air-heater/ 2 3

  3. https://www.autoterm.com/storage/app/media/Manuals/Heaters/Installation%20PLANARS/AIR-EN-Users-manual-with-installation-instructions-v12.2018-1.pdf 2

  4. https://www.volitioncomponents.com/products/4-kw-fuel-fired-air-heater-12-volt 2 3 4

Frequently Asked Questions

What is the difference between Autoterm Air 4D and Air 2D?

Autoterm Air 4D and Air 2D are both diesel air heaters designed for use in vehicles and boats. The primary difference between the two models is their heating capacity. The Air 4D has a higher heating capacity, suitable for middle-sized and high truck cabs, commercial vehicles, and boats up to 48 feet/15 meters long. The Air 2D is designed for smaller spaces, providing less heat output compared to the Air 4D.

How much does Autoterm Air 4D cost?

Check out our Autoterm Diesel Heaters product category to view actual prices.

Where can I find the Autoterm Air 4D manual?

You can find the Autoterm Air 4D manual on the manufacturer's website as a PDF file, which provides information on safe installation, operation, and maintenance of the product.

Are Autoterm diesel heaters reliable?

Autoterm air heaters have built a reputation for reliability and efficiency in the market. They are designed to provide consistent heating performance in harsh conditions and are used in a variety of environments, such as trucks, boats, and commercial vehicles.

What are the key features of Autoterm Air 4D?

The Autoterm Air 4D offers several key features, including a self-adjusting system for operations at high altitudes up to 2500 meters/8200 feet, making it suitable for use in mountainous regions. In addition, it has a compact design, making it easy to install and operate in various types of vehicles and boats, and features low fuel consumption for efficient operation.

Who is the manufacturer of Autoterm Air 4D?

The manufacturer of Autoterm Air 4D is ADVERS LLC, a Russian company based in Samara. They have a representative office in Latvia under the name AUTOTERM LLC, which handles warranty and customer service for their products.