Sparks Overland 4kW Mini Diesel Heater
Sparks Overland 4kW Portable Mini Diesel Heater
Maximum output. Efficient operation. Built the Sparks way.
After more than two years of development, testing, and refinement, the Sparks Overland 4kW Diesel Heater delivers powerful, efficient heat for larger spaces, colder climates, and extended off-grid use — while maintaining the quiet operation, low electrical demand, and refined control that define our heater platform.
This is a Sparks-spec heater platform, built to our requirements and paired with our hand-assembled stainless enclosure and premium components — engineered to perform where it matters most: in the field.
Designed for overlanding, camping, rooftop tents, vans, trailers, and off-grid travel, this heater provides robust diesel heat with modern electronics, Bluetooth control, and dependable long-duration performance.
This model serves as our high-output diesel option, ideal for customers who need more heat without stepping into expedition-grade or commercial pricing.
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Key Highlights
• Brushless motor design for longer service life and smooth, efficient operation
• Automatic altitude compensation for consistent performance at elevation
• Ultra-quiet metering pump with refined combustion tuning
• Extremely low startup draw — just ~8 amps at ignition
• Bluetooth app control for remote adjustment and monitoring
• Strong, stable heat output for larger or colder setups
• Designed for portable or fixed installation
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Production & Lead Time
Each heater is assembled, integrated, and tested to Sparks Overland standards.
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 use in harsh environments.
Diesel-Optimized Fuel System
Designed specifically for diesel operation with quality fuel lines and filtration to ensure clean combustion, reliable cold starts, and long service life.
A Sparks-Developed Heater Platform
This heater platform is the result of two years of real-world testing and refinement. By developing our own core system, we maintain full control over performance, reliability, and long-term support.
Quiet, Refined Operation
A tuned metering pump and smooth fan control significantly reduce ticking noise and vibration — keeping operation calm and sleep-friendly even at higher output.
Modern Electronics & Bluetooth Control
Built-in Bluetooth connectivity allows full heater control through a mobile app. Adjust temperature, monitor operation, and manage output directly from your phone — without leaving your sleeping setup.
Premium Components Only
Stainless exhaust with muffler, sealed electrical connectors, 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 assembled 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)
• Sparks Overland 4kW diesel heater core
• Controller
• Mountable legs
• Quick-connect duct + 27” fully expanded ducting
• 12V cigarette-lighter power plug
• 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 120 m³/h
• Smooth modulation from low to high output
• Consistent, powerful heat with minimal temperature swings
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Efficiency
• Highly efficient heat exchanger
• Low diesel consumption relative to output
• Optimized combustion for long run times and clean operation
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Quiet Comfort
• Low-noise metering pump
• Smooth fan operation with minimal vibration
• Designed to remain sleep-friendly even at higher output
• Ideal for vans, campers, trailers, and larger enclosed spaces
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User-Friendly Control
• Simple, intuitive controller
• Bluetooth app control for remote operation
• Precise temperature adjustment
• Reliable startup and shutdown behavior
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Portability & Installation
• Compact, portable design
• Mounting brackets for fixed or mobile use
• Ideal for vans, campers, trailers, shelters, and large rooftop tents
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Safety
• Overheat protection
• Flame monitoring & automatic shutdown
• Low-voltage protection
• Multiple integrated safety systems
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Specifications
• Heater Output: 4.0 kW (max) / ~1.0 kW (min)
• Fuel Type: Diesel
• Fuel Consumption: ~0.16–0.50 L/hr
• Startup Power Draw: ~8 amps
• Running Power Draw: ~1.2–3.0 amps
• Operating Voltage: 12V
• Altitude Compensation: Automatic
• Operating Temperature: Down to −40 °C / −40 °F
• Fuel Tank: 1.9-gallon stainless steel
• Dimensions (assembled): 20” × 12” × 12.5”
• Weight (assembled): 36 lbs (16.3 kg)
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Why Choose the Sparks Overland 4kW Diesel Heater?
This heater is for customers who need maximum heat output with excellent efficiency, quiet operation, and modern control — without the cost or complexity of expedition-grade systems.
Choose this heater if you want:
• High-output diesel heat for larger spaces
• Reliable performance in cold and high-altitude conditions
• Bluetooth app control with modern electronics
• Manageable power draw for off-grid battery systems
• A Sparks-designed platform with long-term support
This is the high-output diesel foundation of our heater lineup — powerful, efficient, and unmistakably Sparks.
