ESPAR Airtronic D4- Portable Mini 4kW Diesel Heater
Sparks Overland ESPAR Airtronic D4- Portable 4kW Mini Diesel Heater
Big heat. OEM toughness. Ultra-quiet refinement.
When maximum heat and cold-weather reliability matter most, Espar sets the standard. The Sparks Overland Espar Airtronic D4 Portable Diesel Heater delivers powerful, whisper-quiet heat for overlanding, camping, van life, RVs, and demanding off-grid travel — using efficient, cold-weather-proven diesel fuel.
This high-output 4kW system pairs Espar’s legendary Airtronic D4 diesel heater — trusted by OEM vehicle manufacturers, military fleets, and professional expedition vehicles worldwide — with Sparks Overland’s hand-built stainless enclosure and premium components.
Built for larger spaces, extreme cold, and users who demand OEM-grade power, durability, and silence — without compromise.
• Up to 4.0 kW heat output
• Genuine Espar Airtronic D4 (Diesel)
• 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.
Diesel-Optimized Fuel System
Designed specifically for diesel operation, with premium fuel lines and filtration to ensure clean combustion, reliable priming, and long service life — even in sustained sub-freezing conditions.
A Proven ESPAR Core
Powered by the Espar Airtronic D4, the professional-grade diesel heater trusted in OEM, military, and expedition applications where high output and absolute reliability are non-negotiable.
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 diesel heaters available, even at sustained output.
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 D4 diesel 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 large cabins and extreme winter conditions
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Efficiency
• Highly efficient heat exchanger
• Extremely low diesel consumption for its output class
• Optimized combustion for long run times and clean operation
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Quiet Comfort
• Whisper-quiet magnetic fuel pump
• Smooth, balanced blower operation
• Exceptionally low vibration for a 4kW diesel system
• Designed for uninterrupted sleep, even in cold climates
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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 global support
• Trusted worldwide in commercial, military, and expedition use
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Specifications
• Heater Output: 4.0 kW (max) / ~1.0 kW (min)
• Fuel Type: Diesel (EN590)
• 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 diesel heat with extreme cold reliability
• OEM-grade diagnostics and components
• Long service life with worldwide 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 D4 becomes a top-tier portable diesel heating solution for serious cold-weather travelers who need real heat — done the right way.
