Efficient Gasoline Air Heater for Your Vehicle
Stay warm and operational off-grid with quiet, reliable heat and minimal power draw. The compact Espar Airtronic S3 B2L gasoline heater delivers up to 6,800 BTU (2.0 kW), offering precise temperature control through the EasyStart Pro Controller.
Benefits & Use Cases
The Espar S3 B2L provides fast cabin warm-up, stable overnight comfort, and clean gasoline operation — making it an ideal choice for vehicles that don’t carry diesel fuel.
Built for professional operators and vehicle builders, this heater keeps you comfortable and efficient in any environment.
- Smooth, even airflow for consistent comfort
- Low electrical consumption — ideal for battery-first and off-grid systems
- Ultra-quiet operation for uninterrupted rest
- Compact footprint — easy under-seat or storage-box installation
- Compatible with the EasyStart Pro controller for intuitive temperature control
Technical Specifications
- Fuel Type: Gasoline (Petrol)
- Voltage: 12V
- Heat Output: 6,800 BTU (2.0 kW) max; ~3,400 BTU (1.0 kW) low
- Fuel Consumption: 0.04–0.07 gal/h (0.14–0.26 L/h)
- Power Consumption: 11–26 W
- Max Altitude: 13,120 ft (4,000 m) with integrated altitude sensor
- Dimensions (heater body only): 12.2 × 4.5 × 4.8 in (310 × 115 × 122 mm)
- Part Numbers: Heater PN 20 2029 05 0000; Installation Kit PN 25 2720 80 0000
- Certifications/Ratings: EN 55025 class 5; IP5K4K (operating), IP5K6K/IP5K9K (not operating)
- Warranty: 2 years (extendable by 1 year)
Vehicle Compatibility
Designed for gasoline-powered vehicles that operate independently of the engine’s cooling system, including:
- Van conversions and camper builds — for weekend adventures or full-time travel
- RVs and small motorhomes — quiet, efficient heating for off-grid camping
- Truck sleepers and long-haul fleets — reliable heat without idling
- Construction, agricultural, and industrial vehicles — maintain cabin warmth during downtime
- Utility and emergency service vehicles — dependable heat for on-duty crews
- Electric and hybrid vehicles — efficient auxiliary heating solution
Not suitable for diesel applications or marine use.
Kit Includes
- Espar Airtronic S3 B2L 12v Heater
- EasyStart Pro Controller
- Fuel pump (12v)
- Fuel hose
- Exhaust Silencer / Muffler
- Electrical harnesses - Plug n' Play
- Stainless steel exhaust system - approx. 6.6 ft (2m)
- 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
Manuals
Technical Specifications of the Espar Airtronic S3 B2L Gasoline 12V Heater Kit with EasyStart Pro Controller
- Part Number (Heater):
- 20.2029.05.0000/ 20.2029.05.0000 / 20 2029 05 0000 / 20 2029 05 00 00
- Part Number (Installation kit):
- 25.2720.80.0000 / 252720800000 / 25 2720 80 0000 / 25 2720 80 00 00
- Fuel:
- Gasoline
- Voltage:
- 12V
- Max. Altitude:
- 13,120 ft (4,000 m)
- Max. Heat Output:
- 6,800 BTU (2 kW)
- Fuel consumption:
- 0.04 - 0.07 gal/h (0.14 - 0.26 l/h)
- Rated power consumption:
- 11-26W
- Heater model:
- Airtronic S3
Included in the kit:
Efficient Gasoline Air Heater for Your Vehicle
Stay warm and operational off-grid with quiet, reliable heat and minimal power draw. The compact Espar Airtronic S3 B2L gasoline heater delivers up to 6,800 BTU (2.0 kW), offering precise temperature control through the EasyStart Pro Controller.
Benefits & Use Cases
The Espar S3 B2L provides fast cabin warm-up, stable overnight comfort, and clean gasoline operation — making it an ideal choice for vehicles that don’t carry diesel fuel.
Built for professional operators and vehicle builders, this heater keeps you comfortable and efficient in any environment.
- Smooth, even airflow for consistent comfort
- Low electrical consumption — ideal for battery-first and off-grid systems
- Ultra-quiet operation for uninterrupted rest
- Compact footprint — easy under-seat or storage-box installation
- Compatible with the EasyStart Pro controller for intuitive temperature control
Technical Specifications
- Fuel Type: Gasoline (Petrol)
- Voltage: 12V
- Heat Output: 6,800 BTU (2.0 kW) max; ~3,400 BTU (1.0 kW) low
- Fuel Consumption: 0.04–0.07 gal/h (0.14–0.26 L/h)
- Power Consumption: 11–26 W
- Max Altitude: 13,120 ft (4,000 m) with integrated altitude sensor
- Dimensions (heater body only): 12.2 × 4.5 × 4.8 in (310 × 115 × 122 mm)
- Part Numbers: Heater PN 20 2029 05 0000; Installation Kit PN 25 2720 80 0000
- Certifications/Ratings: EN 55025 class 5; IP5K4K (operating), IP5K6K/IP5K9K (not operating)
- Warranty: 2 years (extendable by 1 year)
Vehicle Compatibility
Designed for gasoline-powered vehicles that operate independently of the engine’s cooling system, including:
- Van conversions and camper builds — for weekend adventures or full-time travel
- RVs and small motorhomes — quiet, efficient heating for off-grid camping
- Truck sleepers and long-haul fleets — reliable heat without idling
- Construction, agricultural, and industrial vehicles — maintain cabin warmth during downtime
- Utility and emergency service vehicles — dependable heat for on-duty crews
- Electric and hybrid vehicles — efficient auxiliary heating solution
Not suitable for diesel applications or marine use.
Kit Includes
- Espar Airtronic S3 B2L 12v Heater
- EasyStart Pro Controller
- Fuel pump (12v)
- Fuel hose
- Exhaust Silencer / Muffler
- Electrical harnesses - Plug n' Play
- Stainless steel exhaust system - approx. 6.6 ft (2m)
- 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
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 B2L Gasoline 12V Heater Kit with EasyStart Pro Controller
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Espar
Excellent product