Autoterm 4D Diesel Heater with Single Marine Outlet Kit — 12V Marine Heating System

Meet a compact, high-performance heating solution built for life at sea. The Autoterm Air 4D Diesel Heater with Single Marine Outlet Kit is designed for boats up to 48 ft / 15 m, delivering reliable warmth to saloon, pilot house, or sleeping berths while fitting neatly into tight engine rooms and cabins.

Powerful, Efficient Heating

• Heating power: 4.0 kW maximum for rapid warmth
• Fuel economy: just 0.51 L/h at full output
• Airflow options: up to 168 m3/h on high speed; 70 m3/h on low speed to tailor heat delivery

Quiet, Durable Marine-Grade Design

Built with steel and stainless components to withstand damp, salt air. Brushless induction motors reduce noise and extend service life, making it comfortable for sleeping areas and busy passages alike. The system is engineered to perform in extreme conditions, including temperatures as low as -45°C (-49°F).

All-In-One Marine Heating Kit

This bundle includes the Autoterm Air 4D 12V heater, an OLED control panel for intuitive on‑board temperature management, and a complete installation kit. You get a 1 m fuel line, 1 m ducting, a floor plate, vents, a stainless steel mounting bracket, and a stainless steel exhaust adapter — plus a single marine outlet for efficient hot‑air delivery where you need it most.

Compact, Lightweight, and Easy to Install

Dimensions: 402 × 157 × 188 mm; weight: 5.5 kg. The bendable mounting bracket and compact footprint allow flexible mounting in constrained spaces without compromising heat output, making it ideal for boats and yachts seeking dependable comfort with minimal cockpit or cabin intrusion.

Smart Comfort with Precise Control

The included OLED controller puts temperature management at your fingertips, enabling precise, easy adjustments from anywhere on the vessel. The 12V design integrates seamlessly with standard boat electrical systems, so you can rely on steady, controlled warmth during winter cruising, moorings, or off‑grid adventures.

Who This Is For

Ideal for winter cruising, extended offshore trips, or off-grid setups where consistent heat is a requirement. It targets the spaces you use most—saloon, pilot house, and sleeping berths—while avoiding energy waste by delivering heat where it matters.

Why It Stands Out

Compared with portable or generic heaters, the Autoterm 4D combines marine-grade durability, a compact form, quiet operation, and a plug‑and‑play installation kit that simplifies setup on boats and yachts. Its all-in-one solution is purpose-built for reliable warmth at sea, powered by a robust 12V system and engineered for long-term, maintenance-friendly operation.