MARINE WATER HEATING
Thermo Top Evo
A water heating system for marine installations. Explore the 5 kW diesel kit with MultiControl HD.
5 kW12 VDiesel
WEBASTO THERMO TOP & THERMO PRO
Webasto water heaters.
Comfort that flows.
Explore Thermo Top and Thermo Pro water heating
for marine, RV and commercial systems.
MOTORHOME WATER HEATING
Thermo Top Evo RV
An air and water heating package for campers and RVs, with heat exchangers and installation components.
5 kW12 VDiesel
COMMERCIAL WATER HEATING
Thermo Pro 90
A higher-output coolant heater for commercial and specialist vehicles. Explore the 12 V heater and required installation components.
Up to 9.1 kW12 VDiesel
HIGH-OUTPUT WATER HEATING
Thermo Top Pro 120
For demanding heating systems in larger vehicles. Explore the 12 V heater with water pump; installation kit ordered separately.
12 kW12 VDiesel
System capability depends on the complete installation. Check kit contents, compatibility, current prices and availability at Butler Technik.
THE RANGE AT A GLANCE
Find your starting point.
| Heater model | Heating type | Output | Explore for |
|---|---|---|---|
| Air Top 2000 STC → | Air | 2 kW | Compact cabin heating |
| Air Top Pro 25 → | Air | 2.5 kW boost | Wide output range in a compact heater |
| Air Top Evo 40 → | Air | 4 kW | Motorhomes and larger cabins |
| Air Top Evo 55 → | Air | 5.5 kW | Larger motorhomes and heating demand |
| Thermo Top Evo → | Water | 5 kW | Marine or RV systems, with the right kit |
| Thermo Pro 90 → | Water | Up to 9.1 kW | Commercial coolant heating |
| Thermo Top Pro 120 → | Water | 12 kW | Higher-output vehicle heating systems |
Headline maximum or boost outputs are shown. Heater sizing also depends on insulation, space, climate and heat loss. Confirm the model, fuel, voltage and kit contents before ordering.
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. MultiControl is available in air and water variants; ThermoConnect also requires suitable coverage and a service plan.
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 →