Are You Ready for High Altitude? | ButlerTechnikButlerTechnik Are You Ready for High Altitude? | ButlerTechnik
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Are You Ready for High Altitude?

campervan at high altitude

When you travel to high altitude in your campervan, motorhome or truck you could find a standard vehicle heater does not operate as expected. This is due poor fuel combustion caused by lessening of available oxygen and the inability of your heater to adjust the fuel to air ratio accordingly. Some symptoms you will encounter when operating a heater not designed for high altitudes are;

  • carbon build up
  • heater fails to start
  • smoke from exhaust
  • more regular servicing

An altitude ready vehicle heater automatically adjusts the fuel to air ratio in relation to the altitude, ensuring your heater will work as expected.

Ready for the solutions?

campervan in mountains

There are some actions you can take to ensure you stay warm when traveling at high altitude. Perhaps you haven’t yet obtained a vehicle heater and are trying to decide which one is best for you.

You may already have a heater installed and now find you are spending more time in the mountains than you are on coast. Either way there is a solution for your situation.

Purchase a High Altitude Ready Heater

mercedes sprinter high altitude

From the outset you can purchase a High Altitude Ready Heater Kit (HAK), or you could replace your current heater. As mentioned above, high altitude heaters automatically adjust the air to fuel ratio to compensate for the change in conditions. This will allow you to enjoy warmth up to 3000 metres (9800 feet) above sea level.

Your altitude ready heater will operate at optimal level and will start when you need it to. The build up of carbon (soot) within the heater will be minimised and fuel combustion will be good, minimising smoke from your heater exhaust. Whether travelling at high altitude or lower altitudes your heater will automatically adjust to the conditions.

Adapt Your Heater For High Altitudes

eberspacher data plate

Upgrading an Eberspacher for high altitudes.

If you own an Eberspacher heater there may be an adapter kit available depending the heater model you own. Any Airtronic or Hydronic heater model prior to the new Airtonic S2, Airtronic M2 and Hydronic S3, require a high altitude kit to operate above approximately 1500 metres (500 feet).

The Eberspacher high altitude adapter kit is suitable for the Eberspacher Airtronic D2, D4, D5, and Eberspacher Hydronic D5WSC and D4WSC. You must ensure the ‘h-kit’ symbol is on the data plate (see image). It can be retrofitted but is a necessary add-on if the you plan to use your heater at higher altitudes.

Please contact us for advice if you have a model not listed above.

webasto heater altitude ranges

Can a Webasto be upgraded for high altitudes?

If you own an RV version Webasto heater it can be adapted, but you will need to purchase additional individual parts, as no adapter kit is available due to variants of this brand of heater. If you would like more information about adapting a Webasto heater it is best to contact Butler Technik directly.

High Altitude Heater Kits

Butler Technik have available ready to install high altitude vehicle heater kits. These kits are from well known and reliable manufacturers Eberspacher and Webasto. The kits come ready to install and will suit those that travel and stay in high altitude conditions and at sea-level.

If you have any questions please feel free to contact Butler Technik. We are always happy to assist.

Vehicle Heating at Altitude
Article Name
Vehicle Heating at Altitude
Webasto and Eberspacher heaters are available with automatic altitude adjustments and some models can be adapted with an altitude kit or additional parts. This article explains why a high altitude heaters are different to standard models and what you should do if you require warmth at high altitudes.
Publisher Name
Butlerbus Technik Ltd
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