COMPACT DIESEL AIR HEATING
Airtronic S3 D2L
A compact air heater for campervans and motorhomes. Explore the 12 V diesel vehicle kit with EasyStart Pro control.
2.2 kW12 VDiesel
EBERSPACHER HEATERS, CONTROLLERS & KNOW-HOW
Eberspacher heating.
Wherever you go.
Explore heating for your campervan, motorhome or boat.
Compare the range. Choose your controls.
Find the knowledge behind the warmth.
Airtronic S3 D2L2.2 kW air heating · EasyStart Pro vehicle kit＋
EXPLORE THE EBERSPACHER RANGE
More ways to stay warm.
PETROL AIR HEATING
Airtronic S3 B2L
A petrol heating option for compatible campervan installations. Explore the 12 V vehicle kit with EasyStart Pro.
2 kW12 VPetrol
MOTORHOME AIR HEATING
Airtronic M3 D4R
More heating capacity for larger living spaces. This 12 V diesel vehicle kit includes an EasyStart Pro controller.
4 kW12 VDiesel
HIGHER-OUTPUT AIR HEATING
Airtronic L3 D6L
For vehicles with greater heating demand. Explore the 12 V diesel heater kit, controls and installation components.
6 kW12 VDiesel
VEHICLE WATER HEATING
Hydronic S3 D5E
Heat a vehicle coolant circuit with this 5 kW diesel kit. Cabin warmth and hot water depend on the connected heat exchangers and plumbing.
5 kW12 VDiesel
NARROWBOAT WATER HEATING
Hydronic S3 Marine
A Hydronic S3 D5E kit for narrowboat heating systems, with EasyStart Pro. Connect to a correctly designed radiator and calorifier circuit.
5 kW12 VDiesel
REPLACEMENT WATER HEATER
Hydronic D5WSC
A replacement heater unit for a compatible existing system. Match part number 252219050000, voltage and connections before ordering.
5 kW12 VDiesel
LARGER WATER-HEATING SYSTEMS
Hydronic M-II D10W
Explore the 12 V Hydronic M-II D10W for installations with higher heat demand. Check system design and required installation components.
10 kW12 VDiesel
Explore eight featured heater and kit options. Product photos show a heater or example kit; check Butler Technik for exact contents, current price and availability.
PUT COMFORT IN YOUR HANDS
Your heating. Your way.
PROGRAMMABLE HEATING CONTROL
EasyStart Pro
A rotary control with display and timer functions for compatible Airtronic and Hydronic heaters. Match the heater and CAN wiring.
Air & water12 / 24 V
SIMPLE DISPLAY CONTROL
EasyStart Select
Adjust the temperature and start a compatible air or water heater from a compact display. Check the heater version and harness.
Air & water12 / 24 V
REMOTE HEATING CONTROL
EasyStart Remote+
Start a compatible heating system with a handheld remote. Explore the timer and temperature functions for the complete installation.
Remote control12 / 24 V
SMARTPHONE HEATING CONTROL
EasyStart Web
Control compatible heating from your phone. Check heater compatibility, mobile coverage and the current service subscription.
App control12 / 24 V
START WITH HOW YOU TRAVEL
Heating that fits your world.
Match the system to the space,
the installation and your routine.
Campervans & motorhomes
Air heaters deliver warmth through ducting. For a system that also supplies hot water, explore a water heater with compatible heat exchangers or a calorifier.
Explore vehicle air heatingBoats & marine cabins
Choose a marine installation kit for your boat. Consider cabin layout, ducting routes, electrical supply and whether you need air heating or a water-based system.
Explore marine heatingCommercial & specialist vehicles
Compare cabin air heating with coolant heating for the engine and vehicle heating circuit. Hydronic models offer options for higher heating demand.
Explore water heatingTHE RANGE AT A GLANCE
Find your starting point.
| Heater model | Heating type | Output | Explore for |
|---|---|---|---|
| Airtronic S3 D2L | Air | 2.2 kW | Compact diesel air heating |
| Airtronic S3 B2L | Air | 2 kW | Petrol air heating |
| Airtronic M3 D4R | Air | 4 kW | Motorhome air heating |
| Airtronic L3 D6L | Air | 6 kW | Higher-output air heating |
| Hydronic S3 D5E | Water | 5 kW | Vehicle water heating |
| Hydronic S3 Marine | Water | 5 kW | Narrowboat water heating |
| Hydronic D5WSC | Water | 5 kW | Replacement water heater |
| Hydronic M-II D10W | Water | 10 kW | Larger water-heating systems |
Headline maximum outputs are shown. Size the heater for the space, insulation, climate and heat loss. Check the linked product for exact kit contents, fuel, voltage, current price and availability.
THE TECHNICAL LIBRARY
The knowledge
behind the warmth.
Find installation guides, workshop manuals,
operating instructions and fault-code information.
A LITTLE KNOWLEDGE GOES A LONG WAY
Before you choose.
Answers to the questions
that shape a good installation.
Should I choose an air or water heater?
An air heater warms the cabin directly through ducting. A water heater heats a coolant circuit that can supply heat exchangers, radiators or a calorifier, depending on the installation. Choose around the warmth and hot-water functions you need.
How much heating output do I need?
Start with the space, insulation, expected outside temperatures and how heat will be distributed. Maximum output alone is not enough to size a heater. Butler Technik can help match the heater and kit to your vehicle or boat.
Are vehicle and marine kits interchangeable?
Choose a kit intended for the application. Marine and vehicle installations have different component and routing requirements. Check the installation manual and ask for advice before choosing a kit for a boat.
Can I add a timer or phone control?
Many systems support additional control options. Compatibility depends on the heater version, communication protocol and harness. EasyStart Pro, Select, Remote+ and Web offer different control options. EasyStart Web also requires suitable coverage and a service subscription.
Where do I find manuals and replacement parts?
Use our technical library to find documents by model. For parts, check the identification plate, fuel, voltage and part number, then follow the links to Butler Technik for current stock and purchase options.
Open the technical library