Keep expansive work areas warm and productive with the Flagro FVO-400 390,000 BTU Indirect Fired Oil Heater. Designed with advanced Riello burner technology, a welded 304 stainless steel heat exchanger, and a built-in fuel tank, this high-capacity heater delivers consistent, reliable warmth in even the most demanding environments. With ultra-quiet operation and convenient mobility, the FVO-400 combines performance, durability, and ease of use for industrial and commercial heating applications.

The Flagro FVO-400 is a high-capacity, industrial-grade indirect-fired oil heater providing 390,000 BTU of heating power. Engineered with proven Riello burner technology, including a nozzle pre-heater for cold-weather startups and an updated low-temperature fuel pump, it ensures smooth and efficient operation in challenging conditions.

Built with a durable welded 304 stainless steel heat exchanger and equipped with a built-in fuel tank, this heater delivers reliable, long-lasting performance. High-density flat-free wheels make transport easy, while the smart power indicator ensures safe and uninterrupted operation.

Ideal For:

• Large Construction Sites – Perfect for keeping expansive outdoor and indoor construction zones warm during colder months.
• Warehouses & Industrial Spaces – Maintains consistent temperatures in large unheated facilities, improving worker comfort and productivity.
• Event & Temporary Spaces – Provides efficient, quiet heating for temporary event tents or large-scale venues.
• Maintenance & Repair Areas – Ensures tools, machinery, and work areas remain functional and safe in cold conditions.

What Customers Love About The Flagro FVO-400 Indirect Fired Heater

• 390,000 BTU Output – Delivers massive heating power to maintain comfort in large areas.
• Riello Burner Technology – Includes nozzle pre-heater and upgraded low-temperature fuel pump for smooth cold-weather starts.
• Durable Stainless Steel Heat Exchanger – Welded 304 stainless steel provides long-lasting, corrosion-resistant performance.
• Smart Power Indicator – Confirms proper power supply for safe and reliable operation.
• High-Density Flat Free Wheels – Makes moving and positioning the heater easy, even over rough terrain.
• Built-In Fuel Tank – Provides extended operation without frequent refueling, keeping work areas warm continuously.