ESPAR Airtronic B4- Portable Mini 4kW Gasoline Heater

Sparks Overland ESPAR Airtronic B4- Portable Mini 4kW Gasoline Heater

Big heat. OEM refinement. Ultra-quiet performance.

When serious heat output is required without sacrificing refinement, Espar delivers. The Sparks Overland Espar Airtronic B4 Portable Gasoline Heater provides powerful, whisper-quiet heat for overlanding, camping, van life, RVs, and demanding off-grid travel — using clean-burning gasoline.

This larger-capacity 4kW system pairs Espar’s Airtronic B4 gasoline heater — trusted by OEM vehicle manufacturers, military fleets, and professional expedition builders worldwide — with Sparks Overland’s hand-built stainless enclosure and premium components.

Built for larger spaces, colder conditions, and users who want OEM-grade power, silence, and longevity in a gasoline platform — without compromise.

• Up to 4.0 kW heat output
• Genuine Espar Airtronic B4 (Gasoline)
• 2-Year Espar Warranty Included

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Production & Lead Time
Each heater is hand-built with hours of skilled labor, quality control & rigorous testing. 
Please allow 4–6 weeks for production, plus shipping.

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Why Sparks Overland?
Built the Right Way — Inside & Out

Real Metal Fuel Tank
No plastic. Ever. Our sealed, pressure-vented stainless steel fuel tank is safer, stronger, and built for long-term field use in harsh environments.

Gasoline-Optimized Fuel System
Designed specifically for gasoline operation, using premium fuel lines and filtration to ensure clean combustion, reliable starts, and long service life — even in cold conditions.

A Proven ESPAR Core
Powered by the Espar Airtronic B4, the professional-grade gasoline heater trusted in OEM, military, and expedition applications where higher output and absolute reliability are required.

Ultra-Quiet Magnetic Fuel Pump
Espar’s magnetic fuel pump dramatically reduces ticking noise compared to conventional solenoid pumps — making this one of the quietest high-output gasoline heaters available.

Full System Diagnostics
Advanced diagnostics and fault reporting provide real-time system insight, simplified servicing, and long-term reliability. This is a professional heating system, not a consumer gadget.

Premium Components Only
Stainless exhaust with muffler, sealed electrical connectors, high-quality fuel lines, and carefully selected hardware throughout. Built for durability — not cost cutting.

Fresh Air Combustion Design
All combustion air is drawn from outside the unit. No fumes, no odors, and no shared cabin air.

Hand-Built in Colorado
Every Sparks Overland heater is built one at a time by skilled hands. No mass production. No shortcuts.

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What’s Included
    •    1.9-gallon stainless steel fuel tank (flat design, pressure relief)
    •    Espar Airtronic B4 gasoline air heater
Easy Start Pro Controller
    •    Mountable legs
    •    Quick-connect duct + 27" fully expanded ducting
    •    12V cigarette-lighter power plug
    •    Espar controller
    •    Silicone fuel funnel
    •    Accessory bag (cables & hardware)
    •    Silicone air-intake travel cap
    •    Instruction manual

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Power & Performance
    •    Up to 4.0 kW heat output
    •    Heated air volume up to 155 m³/h
    •    Wide modulation range from low to high output
    •    Strong, consistent heat for larger cabins and extreme cold

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Efficiency
    •    Highly efficient heat exchanger
    •    Optimized gasoline combustion
    •    Long run times with minimal fuel consumption for its output class

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Quiet Comfort
    •    Whisper-quiet magnetic fuel pump
    •    Smooth, balanced blower operation
    •    Exceptionally low vibration for a 4kW system
    •    Designed for uninterrupted sleep, even at higher output levels

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User-Friendly Control
    •    Intuitive Espar controller interface
    •    Real-time diagnostics and system feedback
    •    Precise temperature regulation
    •    Professional-grade service access

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Portability & Installation
    •    Portable, self-contained design
    •    Mounting brackets for fixed or mobile use
    •    Ideal for large rooftop tents, vans, campers, trailers, and shelters

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Safety
    •    Overheat protection
    •    Flame monitoring & automatic shutdown
    •    Low-voltage protection
    •    OEM-grade safety systems throughout

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Reliability
    •    OEM Espar glow plug and internal components
    •    Designed for continuous, multi-season operation
    •    Long service life with full Espar support
    •    Trusted worldwide in professional and expedition use

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Specifications
    •    Heater Output: 4.0 kW (max) / ~0.9 kW (min)
    •    Fuel Type: Gasoline (petrol)
    •    Fuel Consumption: ~0.12–0.49 L/hr
    •    Operating Voltage: 12V
    •    Operating Temperature: Down to -40 °C / -40 °F
    •    Dimensions: 20" x 12" x 12.5"
    •    Weight: 36 lbs
    •    Fuel Tank: 1.9-gallon stainless steel

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Why Choose ESPAR?
Espar heaters are the OEM and professional standard — selected by vehicle manufacturers, military fleets, and expedition builders who demand absolute reliability, ultra-quiet operation, and long-term serviceability.

Choose Espar if you want:
    •    High-output gasoline heat without noise
    •    OEM-grade diagnostics and reliability
    •    Long service life with global support
    •    A heater engineered for professionals, not hobbyists

When paired with Sparks Overland’s stainless fuel system, hand-built enclosure, and premium components, the Espar Airtronic B4 becomes a top-tier portable gasoline heating solution for serious cold-weather travelers who need more heat — done the right way.