Van Heater Systems

Why Does Heating Matter in a Van?

Winter in a van is brutally cold if you have no heat. The thin metal walls offer almost no insulation (that's why we install it), and ambient cold radiates through surfaces near your body. A heating system isn't a luxury; it's what separates comfortable van life from suffering through winter nights.

The system you choose affects your fuel consumption, your electrical load, your noise level, and your daily comfort. Some heat sources work while driving, others only when parked. Some pull from your van's fuel tank, others from a separate tank. Choosing the right one depends on where and how you'll travel.

How Do Diesel Heaters Work in a Van?

Diesel heaters are what we install in most of our builds. They burn diesel from your van's fuel tank (no separate tank needed) and produce heat very efficiently. The two main options are Webasto and Espar (made by Eberspacher).

How They Work

A diesel heater draws fuel from your van's main tank, burns it in a small combustion chamber, and distributes warm air through ducts to living areas. The system runs on battery power (12V) and is controlled by a simple thermostat or dial. Turn it on, set a temperature, and it maintains heat while you sleep or work inside.

The exhaust is vented outside through a small pipe, so there's no carbon monoxide or fume buildup inside. The system is sealed and very safe.

Webasto Heaters

Webasto is the most common choice in van conversions, especially in North America. Models like the Webasto Air Top 2000 (5kW) or 3500 (8kW) are popular. They're reliable, efficient, and easy to install. A 5kW Webasto is enough to heat most vans — it'll warm a small space from freezing to comfortable in under an hour.

Webasto systems can run on a timer, so you set heat for early morning before you wake up. The system cycles on and off to maintain your set temperature, using minimal fuel and battery power. Fuel consumption is about 0.25 gallons per hour on high heat.

Espar/Eberspacher Heaters

Espar (the North American brand name for Eberspacher) makes the Airtronic line. The Espar Airtronic D2 (2kW) is popular for smaller vans and moderate climates, while the Espar D4 (4kW) handles larger interiors and serious cold-weather use. These heaters work similarly to Webasto but have a different design and control system. They're slightly less common in van conversions but equally reliable. Some builders prefer them because parts and service are available, and they come with good thermostat options.

Fuel consumption is comparable to Webasto — efficient and predictable.

Installation and Ducting

The heater mounts low in the van, usually near a door or in a garage area. Warm air ducting runs to living spaces — bedrooms, seating areas, anywhere you want heat. The exhaust pipe exits through a wall or floor, with a muffler to reduce noise. Installation takes a day and requires careful routing to avoid heat damage to nearby materials.

Cost

A Webasto or Espar diesel heater system, fully installed, runs $1500-$2500 depending on ducting complexity and heater model. That includes the heater, fuel line, exhaust, ducts, thermostat, and labor. It's a significant cost, but the reliability and efficiency make it worthwhile for anyone spending winters in a van.

Are Propane Heaters a Good Option for Van Builds?

Propane heaters are another option, most commonly the Truma Combi system. This is a combination heating and hot water system — one appliance provides both heat and domestic hot water.

How It Works

The Truma Combi burns propane to produce heat. For space heating, warm air is distributed through ducts just like a diesel heater. For hot water, the propane flame warms a water tank. You get both systems from one appliance, which saves space and weight.

Pros of Propane

Propane is cheaper per BTU than diesel. The Combi system is compact and efficient. It provides hot water on demand, which is valuable for showers and cleaning. Installation can be simpler because the exhaust and air intake are often combined into one vent.

Cons of Propane

You need a separate propane tank, which takes up space and adds weight. Propane can be harder to find in remote areas (though it's available at most truck stops and RV parks). Some campgrounds restrict propane use. The system requires more maintenance and has more points of failure than a diesel heater.

Cost

A Truma Combi system, installed, costs $1200-$2000. It's cheaper than a diesel heater, but you're also getting hot water as part of the package. If you need separate heating and hot water systems, a Combi might actually be more economical.

Can You Use an Electric Heater in a Van?

Some people use electric space heaters that run off a large battery bank and inverter. These are the simplest option to install — just plug in and turn on.

How It Works

An electric heater draws 120V AC power from your inverter, which converts power from your 12V battery bank. Most space heaters draw 750-1500W, which is heavy battery consumption. A standard space heater running for 8 hours would deplete most van battery banks.

When Electric Makes Sense

Electric heaters work well if you're always plugged into shore power (campgrounds, RV parks). You get heat from unlimited grid power and don't need to worry about battery depletion. But if you boondock or travel without shore power, electric heating isn't practical.

Cost

A quality portable space heater costs $100-$300. There's no installation cost beyond outlet placement. But you need a battery bank large enough to support it (400+ Ah to run for several hours), which is expensive.

Which Van Heating System Should You Choose?

Choose Diesel (Webasto/Espar) If:

You travel to cold climates, boondock (no shore power), or want a system that runs independently from everything else. Diesel heaters are the most reliable for year-round van life and off-grid travel. They're also quiet and don't consume much battery power.

Choose Propane (Truma) If:

You want a combined heating and hot water system in a compact package, plan to visit campgrounds frequently, and don't mind managing a separate propane tank. Propane is good for people who balance boondocking with occasional shore power hookups.

Choose Electric If:

You're always at established campgrounds with shore power, mostly travel in mild climates, and want the simplest system with zero installation. You're not interested in off-grid or boondocking travel.

How Much Does Van Heating Cost?

What Does Van Heater Installation Involve?

Diesel and propane heater installation is complex. It requires running fuel lines, venting exhaust safely, installing ducts, and testing for leaks. It's not a DIY job for most people. We handle the full installation during your build, ensuring everything is safe and operates properly.

Electric heater installation is trivial — you just need a proper outlet. But the lack of portability and battery drain makes it impractical for most van lifers.

When Should You Install a Heater During a Van Build?

If you're getting a diesel or propane heater, it needs to be installed during your build. The system works with your insulation and ventilation — they all work together. Once your van is built and your heating system is installed, winter travel is comfortable.