Eberspächer Technical Heater Information

The most common types of heaters that Eberspacher supply are Airtronic heaters (air heaters) and Hydronic heaters (water heaters).

Airtronic

How the Airtronic Works:

A single cabin control switch, or a 7 day timer, will start the heater operation. The heater's motor will operate the fan drawing in air for the combustion chamber to mix with diesel. This is delivered by the remote factory set fuel metering pump. This draws the fuel for the heater from the main fuel tank (or a separate tank in the case of petrol engined craft).

A glow pin ignites the fuel air mist and combustion is established. This heats the heat exchanger, and the products of the combustion are passed out of the heater and on through flexible stainless steel tube to the exhaust outlet; usually located on the transom, or boat's hull. The heater is not connected in any way to the engine or other boat systems.

The fresh air fan draws in cold air for heating; quite separate from the combustion process. This air passes over the sealed, finned heat exchanger and under pressure, passes through the duct work. This delivers the warm air to the cabins which is automatically controlled to give you your desired temperature.

All the components that go to make a full installation are purpose designed to work together reliably ans withstand the tough marine environment.

Airtronic D2

Airtronic D4

 Hydronic

How the Hydronic works:

On starting the heater draws in combustion air from the engine area or where the heater is located. Fuel is drawn from the boat's tank and mixed with the combustion air. A glow pin ignites the mix and a controlled flame is established in the heat exchanger. The integrated water pump now circulates the system's water, passing it over the heat exchanger and onto the calorifier and radiator system.

Once the system is hot, the heater will regulate down to a lower heat level. This avoids unnecessary cycling and thus avoids wasteful repetition of the start cycle. The heater in lower, or stepped output tops up the system to maintain optimum temperature.

When heavy demands are made on the system, such as showers or a fall in outside temperature, then the Eberspacher steps up again to regenerate the heat in the system.

All the components that go to make a full installation are purpose designed to work together reliably and withstand the tough marine environment.

Airtronic Specifications:

D2 Airtronic:

D4 Airtronic:

D5 Airtronic:

D8LC:

Airtronic Technical Features:

Electronic speed control with gentle adjustment, low noise and low power consumption Fully integrated microprocessor control Continuous monitoring Fan function possible for summer operation Diagnostic system

Hydronic Specifications:

Hydronic 4:

Hydronic 5:

Hydronic 10:

Hydronic 16:

Hydronic 24:

Hydronic 30:

Hydronic 35:

Hydronic Technical Features:

Low noise and low power consumption Fully integrated microprocessor control Continuous monitoring Diagnostic system