Fast, Quiet Diesel Air Heat for Vans, RVs, Trucks & Small Boats
Warm up large cabins quickly and sleep comfortably with low battery draw and steady airflow. The Airtronic M3 D4L delivers up to 13,650 BTU (4 kW) and pairs with the EasyStart Pro for simple, reliable control in all seasons.
Benefits & Use Cases
This latest-generation Eberspächer/Espar Airtronic is designed for bigger spaces—cargo vans, motorhomes, sleeper cabs, and yachts up to ~35 ft—where you need real heat without idling the engine.
- Heats fast, then maintains an even, quiet temperature through the night
- Low electrical draw (5–42 W) to protect house batteries off-grid
- Automatic altitude capability up to 18,000 ft (5,500 m) for mountain travel
- Compact body fits under seats or in service bays on vans, RVs, and trucks
Technical
- Fuel: Diesel
- Voltage: 12V
- Max Output: 13,650 BTU (4.0 kW)
- Fuel Consumption: 0.03–0.135 gal/h (0.11–0.51 l/h)
- Power Consumption: 5–42 W; starting ≤100 W
- Max Altitude: 18,000 ft (5,500 m)
- Warranty: 2 years
- Dimensions (heater body): 14.6 × 5.5 × 5.9 in (371 × 140 × 150 mm)
- Part Numbers: Heater 252955050000; Install kit 252720800000
- Certifications: ECE R122 (heating) & ECE R10 (EMC)
Vehicle Compatibility
- Large trucks – cabs with sleeping cabins
- Vans and small buses
- Large agricultural and construction machines
- Yachts up to ~35 ft
- Motorhomes, minivans, and mobile office/conference vehicles
Kit Includes
- Eberspacher Airtronic AM3 D4L 12v Heater
- EasyStart Pro controller
- Fuel pump (12v)
- Fuel hose
- Exhaust Silencer / muffler
- Electrical harnesses
- Stainless steel exhaust pipe - approx. 90cm
- Combustion intake pipe
- Flexible ducting - 0.5 meter
- Inlet / Outlet grills
- Air outlet (90mm)
- Screws, clips and plastic straps required for installation
- Installation manual
- Warranty documentation
Manuals
Technical Specifications of the Espar Airtronic M3 D4L Diesel 12V Heater Kit with EasyStart Pro Controller
- Part Number (Heater):
- 252955050000
- Part Number (Installation kit):
- 25 2720 80 0000 / 25 2720 80 00 00 / 252720800000
- Fuel:
- Diesel
- Voltage:
- 12V
- Max. Heat Output:
- 13,650 BTU (4 kW)
- Fuel Consumption:
- 0.03 - 0.135 gal/h (0.11 - 0.51 l/h)
- Average Power consumption:
- 5 - 42 W
- Average Power consumption while starting:
- ≤100 W
- Dimensions LxWxH:
- 14.6 x 5.5 x 5.9 in (371 x 140 x 150 mm)
- Heater model:
- Airtronic M3
- Max. Altitude:
- 18,000 ft (5,500 m)
Included in the kit:
Fast, Quiet Diesel Air Heat for Vans, RVs, Trucks & Small Boats
Warm up large cabins quickly and sleep comfortably with low battery draw and steady airflow. The Airtronic M3 D4L delivers up to 13,650 BTU (4 kW) and pairs with the EasyStart Pro for simple, reliable control in all seasons.
Benefits & Use Cases
This latest-generation Eberspächer/Espar Airtronic is designed for bigger spaces—cargo vans, motorhomes, sleeper cabs, and yachts up to ~35 ft—where you need real heat without idling the engine.
- Heats fast, then maintains an even, quiet temperature through the night
- Low electrical draw (5–42 W) to protect house batteries off-grid
- Automatic altitude capability up to 18,000 ft (5,500 m) for mountain travel
- Compact body fits under seats or in service bays on vans, RVs, and trucks
Technical
- Fuel: Diesel
- Voltage: 12V
- Max Output: 13,650 BTU (4.0 kW)
- Fuel Consumption: 0.03–0.135 gal/h (0.11–0.51 l/h)
- Power Consumption: 5–42 W; starting ≤100 W
- Max Altitude: 18,000 ft (5,500 m)
- Warranty: 2 years
- Dimensions (heater body): 14.6 × 5.5 × 5.9 in (371 × 140 × 150 mm)
- Part Numbers: Heater 252955050000; Install kit 252720800000
- Certifications: ECE R122 (heating) & ECE R10 (EMC)
Vehicle Compatibility
- Large trucks – cabs with sleeping cabins
- Vans and small buses
- Large agricultural and construction machines
- Yachts up to ~35 ft
- Motorhomes, minivans, and mobile office/conference vehicles
Kit Includes
- Eberspacher Airtronic AM3 D4L 12v Heater
- EasyStart Pro controller
- Fuel pump (12v)
- Fuel hose
- Exhaust Silencer / muffler
- Electrical harnesses
- Stainless steel exhaust pipe - approx. 90cm
- Combustion intake pipe
- Flexible ducting - 0.5 meter
- Inlet / Outlet grills
- Air outlet (90mm)
- Screws, clips and plastic straps required for installation
- Installation manual
- Warranty documentation
Manuals
Choosing Guide
Option Choosing Guide for this product is coming soon, please contact support@heatso.com 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.
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.
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