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 — espar d2
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
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
- 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)
Manuals
Technical Specifications of the Espar Airtronic S3 D2L Diesel 12V Sprinter Kit with EasyStart Pro Controller
- Fuel:
- Diesel
- Voltage:
- 12V
- Max. Heat Output:
- 7,500 BTU (2.2 kW)
- Fuel consumption:
- 0.02 - 0.07 gal/h (0.01 - 0.27 l/h)
- Power consumption:
- 4 - 27W
- External Dimentions:
- 12.2 x 4.5 x 4.8 in (310 x 115 x 122mm)
- Max. Altitude:
- 13,120 ft (4,000 m)
- Heater model:
- Airtronic S3
Included in the kit:
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 — espar d2
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
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
- 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)
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.
Customer reviews
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Espar Airtronic S3 D2L Diesel 12V Sprinter Kit with EasyStart Pro Controller
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Super easy install
Super happy with this heater. Highly recommend using this in your build. I have installed this myself.