Espar Airtronic S3 D2L Diesel 12V Sprinter Kit with EasyStart Pro Controller
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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.
The Airtronic AS3 D2L is compact, efficient, and designed for modern vans. Automatic altitude adjustment and a brushless motor keep performance steady and quiet.
- 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
- 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)
- 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.
- Espar Airtronic AS3 D2L Diesel 12V heater
- EasyStart Pro Controller
- Fuel pump (12v)
- Fuel hose
- Fuel T piece kit
- 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)
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.
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.
Heatso provides free technical and installation support via email or phone to all of their customers who purchase a heater, heater kit or other products from Heatso. They take pride in their 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 Heatso and they 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.