6 Best Diesel Heaters For Van 2025 in the UK

The Triclicks 12V 5KW Air Diesel Heater is designed for various diesel vehicles, including trucks, campervans, boats, and trailers, and can also be used indoors in places like warehouses or offices. It carries a decent heating capacity of 5KW, suitable for compact spaces, and could require multiple units for larger areas. The heater features low fuel consumption and emissions, making it environmentally friendly, which is a plus for long-term usage.

A standout feature is its remote control with preheating capabilities, allowing users to adjust oil quantity, temperature, and wind speed conveniently, although setting up the remote might require following specific instructions. The heater's silencer and low vibration oil pump help in reducing noise, beneficial for maintaining a quieter environment. However, the installation complexity may be a bit daunting for some, as professional installation is recommended despite the kit including necessary components.

The compact size and relatively manageable weight of 6.7 kg add to its portability, making it feasible to transfer between vehicles if needed. Safety features include a ceramic heated component, ensuring reliability. Users may face limitations on delivery depending on their location in the UK. While the heater provides efficient heating with useful features, potential buyers should consider the installation complexity and their specific heating needs based on space dimensions.

The HCALORY 12V Diesel Heater offers solid heating power with an 8kW output, capable of warming spaces around 20-27 square meters quickly, making it a strong choice for vans, RVs, and similar small to medium spaces. It uses fuel efficiently, consuming between 0.15 and 0.44 liters per hour, and has a large 5L tank that can run for nearly 10 hours, which is great for long trips or overnight use without frequent refueling. Power comes from a 12V or 24V DC source, matching typical vehicle electrical systems. Noise levels are kept low thanks to a sophisticated fuel pump, which is important when you want quiet comfort in a confined space.

The heater also features an altitude mode that automatically adjusts performance up to 5500 meters, a useful feature if you travel in highland areas. Safety is well covered with protections against short circuits, reverse connections, over-voltage, and overheating, giving peace of mind for indoor and vehicle use. Control options are versatile—you can use Bluetooth via a smartphone app, remote control, or LCD panel, letting you customize temperature and timing easily.

The heater weighs about 8.9 kg and measures 46 x 32 x 39 cm, so installation might require some planning and space inside your van. While it’s described as portable, it’s not the smallest or lightest model out there, which could be a factor if you need a very compact setup. This heater combines quick, efficient heating with smart control and safety features, making it a reliable option for van owners willing to accommodate a slightly heavier unit that requires some installation effort.

The PRIJESSE Diesel Air Heater offers a strong heating capacity of 5kW, effectively warming van interiors quickly — reportedly raising a small vehicle's temperature from 35°F to 72°F in about 8 minutes. Using diesel fuel, it integrates a 12V power system, compatible with most vehicles such as vans, trucks, and campervans. Noise levels are minimized by a silent fan and oil pump designed to reduce vibrations, which benefits overnight or quiet camping situations.

The heater includes a comprehensive installation kit with pipes, thermostat, remote control, and mounting hardware to simplify setup, although some basic mechanical skill may be needed due to the unit's weight of 10 kg and size (approximately 15 x 6 x 6 inches). It features safety measures like stable combustion and temperature tolerances ranging from -40°C to +50°C, ensuring reliable performance in cold conditions.

This heater is well-suited for van owners seeking reliable, fast heating combined with quiet operation. Prospective buyers should prepare for a moderate installation process and verify power compatibility with their vehicle before purchase.