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Free shipping to USA and Canada on orders over $499

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Espar / Eberspacher Marine Heater Kits

Espar Marine Heaters

Keep yourself and the crew comfortable below decks with the world's leading manufacturer of heating systems - Espar / Eberspacher

About Espar

Who are Espar

Espar is known for manufacturing the best quality products for commercial vehicles of all types. Since 1977, it has been the hub for heating systems around the globe. A leading company that's known for innovative technological and climate solutions. Currently, the company is looking to introduce the use of hydrogen as an alternative fuel.

Why Espar

Espar products are definitely among the best when it comes to vehicle air heaters that meet today's demands. All of their heaters are extremely reliable and quiet. Made to preheat the engine before starting, which makes it less harsh in cold climates. You can never go wrong with Espar when upgrading your new marine application. Whether you are upgrading your marine vessel, or want to live in an older boat or yacht in comfort, you can never go wrong with Espar.

Espar Heaters at Sea

Espar heaters are used to provide you with warm air and hot water on demand, which is especially important when travelling at sea. You need hot water for cleaning, drinking, showering and maintaining a sterile environment to prevent disease. Air heaters always maintain a comfortable temperature, so you feel at home and can sleep well at night.

Free USA & CA Shipping

24/5 Support

2 Year Warranty

Marine Water Heater

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Check all of our Marine Water Heaters

  • The newest hydronic heater. It is an upgraded version of the D5S diesel heater. The new Espar S3 D5E boat heater has been developed with the highest standards of quality and performance in mind
  • The third-generation hydronic heater is popular for its compact size, silent brushless motor, and improved fuel pump piston. These and other features make it the quietest heater in this category
  • The unit also boasts a unique residual heating system that allows the heater to operate after the engine is shut off
  • Plug & Play technology allows the heater to be installed effortlessly with no extra parts/tools required
  • The water flow is 500 liters per hour, and a cooling system is included in the kit
  • The heater features a stepless system that adjusts the fan speed according to the temperature in order to optimize efficiency and increase comfort levels
  • Easy to control and run diagnostics for faults and errors.
  • The upgraded heater includes a brushless fan and an improved water pump, which increases its lifecycle from 3,000 to 5,000 hours

Hydronic S3 D5E Kit Contents

  • Espar Hydronic D5E S3 Heater 252934050000
  • Fuel Metering Pump
  • Water Pump
  • Water nozzle x 2
  • Ring x 2
  • M5 Bolt x 18
  • Mounting brackets
  • Clamps and screws

Customer reviews

Marine Air Heater

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Check all of our Marine Air Heaters

  • This 12V Espar diesel heater offers 5.5kW / 18770 BTU of heat output, making it the most powerful Espar air heater available
  • It requires only 0.75 liters of diesel for one hours’ heating at maximum level. This makes it a cost and fuel efficient long-term option for boats and marine vessels
  • D5 can heat up multiple areas simultaneously and offers 4 heat output levels - low, medium, high, power (boost) - plus an air ventilation mode
  • Uses 3 Espar protocol technologies - CAN, LIN and S+ - which means it is compatible with earlier generation controllers
  • Includes thermostatic functionality due to its integrated temperature sensor. It's extremely easy to control and run diagnostics for faults and errors.
  • Fuel supply can be directly taken from the vehicle's fuel tank
  • Can handle ducting up to 49 feet / 15 meters and multiple outlets. It has one of the highest duct ratings for length and complexity of ducting
  • Has CE safety certification and features automatic shut down for added safety

Airtronic D5 Kit Contents

  • Eberspacher Airtronic D5 12v Heater
  • Fuel pump (12v)
  • Fuel hose
  • Fuel T piece kit
  • Electrical harnesses
  • Stainless steel exhaust pipe
  • Combustion intake pipe
  • Flexible ducting
  • Inlet / Outlet grills
  • Air outlet ball type
  • Screws, clips and plastic straps required for installation
  • Mount Bracket
  • Warranty documentation


OVER 499$