Flagro FVO-400 390,000 BTU Indirect Fired Heater - Oil

Flagro SKU: FVO-400

Price:
Sale price$4,289.14

Description

Maximize Heating Efficiency with the Flagro FVO-400 390,000 BTU Indirect Fired Oil Heater – Built for Large-Scale Industrial Applications

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.

Flagro 390,000 BTU Indirect Fired Heater Features

  • 390,000 BTU Output – Provides high-capacity heating for large industrial or commercial spaces.
  • Riello Burner Technology – Advanced cold-weather startup technology ensures reliable, efficient operation.
  • Welded 304 Stainless Steel Heat Exchanger – Durable, corrosion-resistant design for long-term industrial use.
  • Smart Power Indicator – Verifies correct power supply for safe, uninterrupted operation.
  • High-Density Flat Free Wheels – Easy to move and transport without risk of flat tires.
  • Built-In Fuel Tank – Reduces downtime with extended heating capability.

FVO-400 Specs

Weight 450 lbs
Dimensions 70 × 29 × 52 in
Heating Capacity Up to 390,000 BTU/H
Fuel Tank Capacity/ Run Time 42 US GAL/ 14 HRS
Power Requirements 115V/15 AMPS (10.5 AMP Draw)
Fan Motor/ Air Circulation 3/4 H.P. / 2,500 CFM
Heat Exchanger 16 Gauge 304 Stainless Steel
Ignition Direct Spark
Nozzle Size/ Pump Pressure 2.00 X 60B / 170 PSI
Air Outlet 2 x 12” Dia or 1 X 16” Dia
Wheels 2 x 16” High Density Flat Free
Approvals cETLus
Outlet Ducting FV-HD12 – 12” x 12, FV-HDG16 – 16” x 25
Remote Thermostat FV-THB
Option FVO-TLS – Tigerloop System

Standard Warranty Coverage

New Flagro Heaters come with:

  • 12-Month Limited Parts Warranty from date of purchase
  • Coverage for defective parts and manufacturing defects
  • Parts replacement only (labor costs not included)

What's Covered

✓ Defective parts due to manufacturing issues

✓ Components that fail under normal operating conditions

✓ Parts specified in your product manual

What's NOT Covered

✗ Labor costs for repairs or installation

✗ Damage from improper power supply

✗ Damage from misuse or improper operation

✗ Normal wear and tear

✗ Shipping costs for warranty parts

Important: Warranty Conditions

⚠️ Operating your heater with a faulty power supply or improper usage will void the warranty.

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Flagro FVO-400 390,000 BTU Indirect Fired Heater - Oil Reviews

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