When it comes to keeping warm in off-grid conditions—whether you’re traveling in a van, living in a tiny home, working from a remote cabin, or sailing through cold waters—a dependable heating system is essential. The Planar diesel heater has become a go-to solution for adventurers and professionals who need compact, efficient, and reliable heat wherever they are.
In this article, we’ll dive into what a Planar diesel heater is, how it works, its advantages, and answer some frequently asked questions to help you decide if it’s the right choice for your setup.
What Is a Planar Diesel Heater?
The Planar diesel heater is a compact, fuel-efficient air heater that runs on diesel and is designed to operate in vehicles, boats, RVs, trucks, and off-grid structures. Manufactured by Planar Heaters (also known as Autoterm), a European company with a strong reputation for quality, these heaters are designed to perform reliably in harsh environments, including Arctic conditions.
Unlike traditional propane heaters, diesel heaters like the Planar system can run continuously for hours (or days) on a small amount of fuel, making them perfect for long-term off-grid living or travel.
How Does a Planar Diesel Heater Work?
A Planar diesel heater works by drawing in air from the outside or the cabin, passing it over a heat exchanger warmed by burning diesel fuel, and then blowing the hot air back into the space.
Here’s a simple breakdown of the process:
- Diesel fuel is pumped from a fuel tank to the combustion chamber.
- Air mixes with the fuel and ignites.
- The heat warms a metal surface (the heat exchanger).
- A fan blows room air over the heat exchanger and circulates the heated air into your space.
- Exhaust gases are safely vented outside.
Since the combustion and cabin airflows are completely separate, there’s no risk of exhaust fumes entering your living space when installed properly.
Key Features of Planar Diesel Heaters
- Fuel Efficiency: Consumes as little as 0.1–0.24 liters of diesel per hour depending on the model.
- Low Power Consumption: Draws minimal power from your battery system.
- Self-contained Units: Models like the Planar 2D come with all installation parts, including fuel pump, exhaust, and wiring.
- Safe & Quiet Operation: Modern Planar heaters come with safety shutdowns, temperature sensors, and noise-reducing components.
- Versatile Installation: Suitable for RVs, vans, boats, trucks, cabins, and even tents.
Popular Planar Models
- Planar 2D: Ideal for vans, small boats, and tiny homes. Heats up to 25 ft.
- Planar 44D: More powerful, suited for larger RVs, trucks, or marine use.
- Portable Diesel Heater: Enclosed in a metal case, this version is ready-to-use and can be moved between locations.
Advantages Over Propane Heaters
- Lower Operating Costs: Diesel is often cheaper and more energy-dense than propane.
- No Moisture Buildup: Unlike propane, diesel combustion doesn’t release water vapor into your living space.
- Continuous Operation: Can run for days on a small amount of fuel.
- Higher Safety Profile: Properly vented diesel heaters reduce carbon monoxide risk and are sealed from cabin air.
Installation Considerations
While installation requires basic mechanical skills, many DIYers find the process manageable with the included kit. You’ll need to:
- Mount the heater securely.
- Route fuel lines from the tank or vehicle’s fuel system.
- Install the air intake and exhaust lines.
- Wire to a 12V power source.
- Vent the warm air into your space.
Professional installation is always an option if you’re not confident.
FAQs About Planar Diesel Heaters
1. Is a Planar diesel heater safe to use in a van or RV?
Yes, when installed correctly, it’s very safe. The combustion process is isolated from the cabin air, and exhaust gases are vented outside.
2. How noisy are Planar heaters?
Planar heaters are designed to be relatively quiet. However, some noise may come from the fuel pump or fan. Noise levels can be reduced using rubber mounts and silencer kits.
3. Can I install a Planar diesel heater myself?
Many people install their own Planar heaters with the help of detailed instructions and online guides. If you’re unsure about fuel or electrical connections, hiring a pro is a smart move.
4. Where can I buy Planar diesel heaters?
They’re available from authorized dealers, online retailers, and directly from the manufacturer. Be sure to buy genuine units, as cheaper knockoffs may lack safety certifications.
5. How much fuel does a Planar heater use?
Depending on the model and output setting, fuel use ranges from 0.1 to 0.24 liters per hour.
6. Do Planar heaters require regular maintenance?
Minimal maintenance is needed. Keep the fuel clean, check the exhaust system regularly, and clean the combustion chamber as per the manual’s recommendations.
7. Can it run while I’m driving?
Yes, most Planar heaters can operate while the vehicle is in motion, making them great for road trips in cold weather.
Final Thoughts
If you’re looking for an efficient, reliable way to heat your off-grid space, vehicle, or boat, the Planar diesel heater is a solid investment. Built to withstand extreme conditions, easy to maintain, and incredibly fuel-efficient, it’s a favorite among vanlifers, overlanders, and off-grid dwellers worldwide.
Whether you need a permanent install or a portable option, Planar has a model to suit your heating needs—so you can stay warm wherever your adventure takes you.
