Quiet Diesel Heater for Sprinters — Fast, Even Warmth
Stay comfortable in cold weather with reliable, engine-independent heat. The Espar Airtronic S3 D2L 12V Diesel Heater delivers up to 7,500 BTU (2.2 kW) of clean, efficient warmth — perfect for Sprinter vans, RVs, and professional conversions.
The included EasyStart Pro Controller provides precise temperature management and intuitive scheduling, so you can enjoy effortless comfort anywhere your work or travels take you.
Benefits & Use Cases - Eberspacher / Espar Airtronic D2L
The Airtronic AS3 D2L is compact, efficient, and designed for modern vans. Automatic altitude adjustment and a brushless motor keep performance steady and quiet.
- Latest Updated D2L Heater Version
- 2 Year North American Warranty included
- Supplied by an official Eberspächer US dealer - no import tariffs in the US
- Fast warm-up and stable cabin temps without running the engine
- Low fuel draw for off-grid camping and overnight heating
- Quiet operation with improved pump acoustics and stepless output control
- Ideal for Mercedes-Benz Sprinter builds, small motorhomes, truck cabs and more
Technical
- Fuel: Diesel (HVO/GTL compatible)
- Voltage: 12V
- Output: 2,900–7,500 BTU (0.85–2.2 kW)
- Fuel consumption: 0.02–0.07 gal/h (0.10–0.27 L/h)
- Power draw: 6–27 W during operation
- Max altitude: ≈13,120 ft (4,000 m) automatic altitude adjustment
- Dimensions (heater body): 12.2 × 4.5 × 4.8 in (310 × 115 × 122 mm)
- Part numbers: Heater 25.2953.05.0000; universal install kit 252029800000
- Certifications/ratings: EN 55025 class 5; IP5K4K (operating), IP5K6K/IP5K9K (not operating)
- Warranty: 2 years (extendable by 1 year)
Vehicle Compatibility
- Mercedes-Benz Sprinter vans (adapter for aux fuel tap included)
- RVs, campervans, and small motorhomes
- Truck cabs and sleeper units
- Construction, agricultural, and industrial machinery
- Utility, service, and emergency response vehicles
Not suitable for gasoline vehicles or electric-only platforms.
Kit Includes
- Espar Airtronic AS3 D2L Diesel 12V heater
- EasyStart Pro Controller
- Fuel pump (12v)
- Fuel hose
- Exhaust Silencer / Muffler
- Electrical harnesses - Plug n' Play
- Combustion intake pipe ~3.3 ft (1 m)
- Flexible ducting (60 mm. diameter) - 1.64 ft (0.5 m)
- Inlet grills
- Adjustable air outlet grill (60 mm. diameter)
- Screws, clips and plastic straps required for installation
- Installation manual CD (Scan QR code for installation manual download)
- Warranty documentation
The kit additionally includes the following:
- Specific Mercedes Benz Sprinter Adapter for aux tap
- Pro controller extension 9.8 ft (3m)
- Floor mounting plate
- Stainless steel exhaust system - approx. 6.6 ft (2m)
Browse Eberspächer/Espar Manuals & Technical Documentation