• Espar Hydronic II D5S Diesel 12V OES Heater with installation kit and Timer
  • Espar Hydronic II D5S Diesel 12V OES Heater with installation kit and Timer

Eberspacher / Espar

Espar Hydronic II D5S Diesel 12V OES Heater with installation kit and Timer

£1,888.75
Core Features & Benefits
Core Features & Benefits
Core Features & Benefits
Core Features & Benefits
  • Features & Benefits
  • Effortless engine starting, fuel savings, and environmental protection.
  • Features & Benefits
  • Cozy cabin environment in the coldest weather.
  • Features & Benefits
  • Suitable for a wide range of car models.
  • Features & Benefits
  • Easy-to-use and smart heating control options.
Select additional options (Optional):
Extended Warranty for Peace of Mind:
Warranty Information
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  • Easy Returns
    14-day Returns
  • Free Shipping in US
    on orders $499
  • Professional Support
    Shop with an expert
  • Easy Returns
    14-day Returns
Hydronic engine preheater for faster cold starts & cabin comfort

Warm your engine and cabin efficiently with this compact Espar hydronic heater. The Hydronic 2 D5S delivers steady 17,000 BTU (5 kW) diesel heating and pairs with the EasyStart Timer for precise schedules and diagnostics - perfect for winter reliability and off-grid use. This second-generation heater still works with a high altitude kit, to increase capabilities to operate in higher altitudes, where other models might be struggling to operate

Benefits & Use Cases - Eberspacher coolant heater

Cut idling, reduce engine wear, and enjoy quiet hydronic warmth. Ideal as an Eberspacher engine heater for cold-start protection in passenger vehicles and commercial fleets, and as a compact boiler for RV water/air heat exchangers.

  • Engine-off preheating for faster starts and lower emissions.
  • Stable coolant loop heat for fan-coil or heat-exchanger cabin heating.
  • EasyStart controller adds timer programs and service prompts.
  • Efficient diesel operation for long runtime with minimal fuel use.

Technical

  • Fuel: Diesel
  • Voltage: 12V
  • Heat output: 17,000 BTU (5 kW)
  • Part numbers: 252620050000 (also referenced as 252526050000 and variants)
  • Warranty: 2 years

Vehicle Compatibility

  • Cab and engine heater
  • Passenger cars (from 2.0 L displacement)
  • Emergency vehicles
  • Vans, large taxis, minivans
  • Commercial vehicles (incl. tandem configs with air heaters)
  • Construction & agricultural machines
  • Motor yachts up to ~25 ft
  • Motor homes

Kit Includes

  • Hydronic 2 D5S 12V heater with mounting bracket
  • EasyStart Timer controller
  • Coolant pump with mounting bracket
  • Fuel metering pump with mounting accessories
  • Wiring harness
  • Coolant pump harness
  • Water connection sockets (x2)
  • Fuel Standpipe and fuel line
  • Silencer / muffler with Z shape bracket
  • Exhaust Hose 
  • Coolant hose
  • Air intake silencer 
  • Mounting accessories - cable ties, clamps, screws, etc.
 
 

Technical Specifications of the Espar Hydronic II D5S Diesel 12V OES Heater with installation kit and Timer

Part Number:
252620050000 / 25.2620.05.0000 /25.2620.05.00.00 25 2620 05 0000 /25 2620 05 00 00
Fuel:
Diesel
Voltage:
12V
Max. Heat Output:
17,750 BTU (5.2 kW)
El. power consumption:
12 - 40W
Fuel consumption:
0.06 - 0.16 gal/h (0.26 - 0.64 l/h)
Dimentions (L x W x H):
8.4 x 3.3 x5.4 in (214 x 86 x 139 mm)
Weight:
5.2 lbs (2.4 kg)
Heater model:
Hydronic II
Max. Altitude:
5,000 ft (1,500 m)

Included in the kit:

Hydronic engine preheater for faster cold starts & cabin comfort

Warm your engine and cabin efficiently with this compact Espar hydronic heater. The Hydronic 2 D5S delivers steady 17,000 BTU (5 kW) diesel heating and pairs with the EasyStart Timer for precise schedules and diagnostics - perfect for winter reliability and off-grid use. This second-generation heater still works with a high altitude kit, to increase capabilities to operate in higher altitudes, where other models might be struggling to operate

Benefits & Use Cases - Eberspacher coolant heater

Cut idling, reduce engine wear, and enjoy quiet hydronic warmth. Ideal as an Eberspacher engine heater for cold-start protection in passenger vehicles and commercial fleets, and as a compact boiler for RV water/air heat exchangers.

  • Engine-off preheating for faster starts and lower emissions.
  • Stable coolant loop heat for fan-coil or heat-exchanger cabin heating.
  • EasyStart controller adds timer programs and service prompts.
  • Efficient diesel operation for long runtime with minimal fuel use.

Technical

  • Fuel: Diesel
  • Voltage: 12V
  • Heat output: 17,000 BTU (5 kW)
  • Part numbers: 252620050000 (also referenced as 252526050000 and variants)
  • Warranty: 2 years

Vehicle Compatibility

  • Cab and engine heater
  • Passenger cars (from 2.0 L displacement)
  • Emergency vehicles
  • Vans, large taxis, minivans
  • Commercial vehicles (incl. tandem configs with air heaters)
  • Construction & agricultural machines
  • Motor yachts up to ~25 ft
  • Motor homes

Kit Includes

  • Hydronic 2 D5S 12V heater with mounting bracket
  • EasyStart Timer controller
  • Coolant pump with mounting bracket
  • Fuel metering pump with mounting accessories
  • Wiring harness
  • Coolant pump harness
  • Water connection sockets (x2)
  • Fuel Standpipe and fuel line
  • Silencer / muffler with Z shape bracket
  • Exhaust Hose 
  • Coolant hose
  • Air intake silencer 
  • Mounting accessories - cable ties, clamps, screws, etc.
 
 

Choosing Guide

Option Choosing Guide for this product is coming soon, please contact [email protected] if you need help picking the right options or have any questions.

Shipping

  • United States - 1-5 Working Days
  • United Kingdom - 2-5 Working Days
  • European Union - 2-7 Working Days
  • Australia / New Zealand - 5-14 Working Days
  • Rest of World - 5-14 Working Days

There may be a delay if the order is shipped to a PO or parcel shop address. Please note, some couriers do not offer shipping to PO boxes.

View full shipping & Delivery information

Returns

You can return or exchange goods within 14 days from the date of purchase if the item is unused and brand new in unopened packaging. You must contact us before returning any goods, though. Additional deductions might be applied as indicated in the Returns section of our Terms and Conditions.

View full Returns & Refunds information

Warranty Information

Most heaters come with 2 year warranty + optional 1 year extended Warranty available

  • Parts - 1 Year Warranty
  • Refrigerators - 2 Year Warranty
  • AC Systems - 1 Year Warranty
  • Heavy duty heating equipment (10 kW+) - 1 Year Warranty
  • Other items - 1 Year Warranty

Installation, servicing and maintenance must be done in accordance with manufacturers guidelines. Failure to follow these guidelines will result in voiding your warranty.

We provide free technical and installation support via email or phone to all of our customers who purchase a heater, heater kit or other products from Heatso. We take pride in our customer service and want to ensure that your heater system is properly installed. As a result, if you have any difficulties, please do not hesitate to contact us.

If you require removing and/or refitting your item, please visit a local professional or authorized specialist, if you can not find one you can contact us and we will try to recommend a local partner to assist with the task. The cost of removing and/or refitting this item is not covered by the warranty.

View full warranty Information

Customer reviews

(5 reviews) 5 out of 5 Write a Review
  • Worth it

    Posted by Dylan B on 9th Sep 2024

    5

    A great little runner with blower unit. Got independent air heating with Kalori Kuba and water plates. Using my own plates. 24 plate exchanger works like a treat. No more army showers!

  • Heater

    Posted by Dennis on 9th Sep 2024

    5

    Great it just what I needed

  • Need heat

    Posted by Dennis Sloan on 6th Jan 2020

    5

    It was good fast delivery fit perfectly they were very helpfull

  • Heater

    Posted by Dennis on 10th Dec 2019

    5

    Great it just what I needed

  • Worth it

    Posted by Dylan B on 19th Jun 2019

    5

    A great little runner with blower unit. Got independent air heating with Kalori Kuba and water plates. Using my own plates. 24 plate exchanger works like a treat. No more army showers!

  • Description

  • Technical Specifications

  • Kit Includes

  • Shipping & Returns

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