Flagro FVO-750 – 750,000 BTU Indirect Fired Heater-Oil
Quick Quote Request
Buy Direct & Save
"*" indicates required fields
The Flagro FVO-750 750,000 BTU Oil-Fired Indirect Heater delivers high-capacity temporary heating for construction sites, warehouses, and industrial facilities. Its rugged skid-mounted design features a stainless steel heat exchanger, VFD-controlled blower, and dual 16-inch supply and return connections.
Key Specifications:
- Heating: 750,000 BTU/hr
- Fuel: Diesel, Fuel Oil, or Kerosene
- Airflow: 7,000 CFM
- Electrical: 208–230V, Single or Three Phase
- Fan Motor: 7.5 HP with VFD Soft Start
- Fuel Consumption: Approximately 5.2 GPH
- Duct Connections: Dual 16″ Supply and Return
- Weight: Approximately 1,400 lbs
Nationwide shipping available. Contact us for pricing and availability.
The Flagro FVO-750 750,000 BTU Oil-Fired Indirect Heater delivers high-capacity temporary heating for construction sites, warehouses, industrial facilities, and large commercial buildings. Designed for demanding heating applications, this skid-mounted indirect-fired heater provides 750,000 BTU/hr of heating capacity and 7,000 CFM of airflow.
Operating on approved fuel oil, diesel, or kerosene, the FVO-750 uses a high-performance burner and a 16-gauge 304 stainless steel heat exchanger to separate combustion exhaust from the heated supply air during normal operation.
The heater features a 7.5 HP blower motor with a standard variable-frequency drive (VFD) for controlled startup, dual 16-inch heated-air outlets, and dual 16-inch return-air connections.
Available in 208–230V single-phase and three-phase electrical configurations, the Flagro FVO-750 provides flexible high-capacity heating for commercial construction and industrial projects.
Its heavy-duty skid base features four-sided forklift pockets for transporting and positioning the unit at suitable jobsites.
Key Features of the Flagro FVO-750
- 750,000 BTU/hr Heating Capacity: High-output temporary heating for large commercial and industrial spaces.
- 7,000 CFM Airflow: Distributes large volumes of heated air through suitable ducting systems.
- Oil-Fired Operation: Compatible with manufacturer-approved fuel oil, diesel, or kerosene.
- Indirect-Fired Heating: Uses a heat exchanger to separate normal burner exhaust from delivered heated air.
- 304 Stainless Steel Heat Exchanger: Constructed from durable 16-gauge stainless steel.
- 7.5 HP Blower Motor: Supports high-volume commercial air distribution.
- VFD Soft Start: Provides controlled blower startup and shutdown.
- Single-Phase or Three-Phase Power: Available for 208–230V electrical service.
- Dual 16-Inch Air Outlets: Allows heated air to be distributed through compatible ducting.
- Dual 16-Inch Return-Air Inlets: Supports appropriate return-air and recirculation configurations.
- Direct Spark Ignition: Provides automatic burner ignition.
- Skid-Mounted Construction: Designed for industrial handling and commercial deployment.
- Four-Sided Forklift Pockets: Simplifies lifting and positioning with appropriate equipment.
- cETLus Listed: Manufacturer-listed safety certification.
High-Capacity Indirect-Fired Heating
The Flagro FVO-750 is designed for applications requiring large volumes of heated air without intentionally introducing combustion products into the conditioned airflow.
Unlike direct-fired heaters, an indirect-fired heater uses a heat exchanger to transfer heat from the burner to a separate air stream.
This allows heated air to be delivered through ducting while combustion exhaust is handled through the heater’s flue system.
The FVO-750 provides several advantages for suitable temporary heating applications:
- High-capacity heat output
- Heated supply air separated from normal combustion exhaust
- No direct addition of combustion moisture to the heated supply air
- Compatibility with commercial supply and return ducting
- Skid-mounted construction for convenient jobsite handling
Important: Indirect-fired heating still requires proper combustion-air supply, exhaust venting, clearances, and installation according to the manufacturer’s instructions.
Common Applications for the Flagro FVO-750
Large Construction Sites
Commercial construction projects frequently require temporary heating during colder weather, building renovations, and winter construction operations.
The FVO-750 delivers 750,000 BTU/hr of heating capacity for appropriately sized construction heating systems.
Common applications include:
- Commercial construction projects
- Winter building operations
- Temporary construction enclosures
- Industrial construction sites
- Building renovations
- Heating during HVAC replacement
Its rugged skid-mounted design allows equipment to be handled using appropriately rated forklifts.
Warehouses and Distribution Centers
Warehouses and distribution facilities may require temporary heating during extreme temperatures, HVAC failures, or maintenance shutdowns.
The FVO-750 provides substantial heating capacity and airflow for appropriately designed temporary heating arrangements.
Compatible ducting can help direct heated air to separate work areas or distribution points.
Industrial and Manufacturing Facilities
Manufacturing facilities and industrial operations may need temporary heat during seasonal demand, maintenance projects, or equipment replacement.
The Flagro FVO-750 provides a high-capacity heating solution for suitable industrial applications.
Temporary Structures and Commercial Tents
The FVO-750 can support heating for appropriately designed temporary structures and commercial tents.
Its indirect-fired system separates combustion exhaust from the heated supply air during normal operation.
Heater placement, combustion exhaust, ventilation, ducting, and fire-safety requirements must be evaluated before installation.
Emergency Commercial Heating
The FVO-750 can provide temporary heating during:
- Permanent HVAC equipment failures
- Industrial maintenance shutdowns
- Commercial building renovations
- Winter construction projects
- Emergency heating requirements
- Planned heating-system replacement
Explore Commercial Heating Applications
Flagro FVO-750 Technical Specifications
| Specification | Flagro FVO-750 |
|---|---|
| Model Number | FVO-750 |
| Equipment Type | Oil-Fired Indirect Heater |
| Heating Capacity | 750,000 BTU/hr |
| Approved Fuels | No. 1 / No. 2 Fuel Oil, Diesel, Kerosene |
| Published Fuel Consumption | 5.2 Gallons/hr |
| Burner Type | Oil Burner |
| Ignition | Direct Spark |
| Burner Nozzle | 4.50 × 60W |
| Fuel Pump Pressure | 160 PSI |
| Electrical Supply — Single Phase | 208–230V |
| Current Draw — Single Phase | 18 Amps |
| Electrical Supply — Three Phase | 208–230V |
| Current Draw — Three Phase | 14 Amps |
| Blower Motor | 7.5 HP |
| Airflow | 7,000 CFM |
| Fan Control | VFD Standard |
| Heat Exchanger | 16-Gauge 304 Stainless Steel |
| Supply-Air Outlets | Two 16″ Diameter |
| Return-Air Inlets | Two 16″ Diameter |
| Mounting | Skid Base |
| Forklift Pockets | Four-Sided |
| Length | 98″ |
| Width | 36″ |
| Height | 61″ |
| Weight | Approximately 1,400 lbs |
| Certification | cETLus |
Specifications are based on Flagro’s published FVO-750 product information. The operating manual lists slightly different fuel consumption. Verify the current equipment nameplate, electrical circuit protection, fuel requirements, and installation instructions before operating.
Fuel Requirements and Consumption
The Flagro FVO-750 operates on manufacturer-approved oil-based fuels.
Supported fuel types include:
- No. 1 Fuel Oil
- No. 2 Fuel Oil
- Diesel
- Kerosene
The manufacturer’s current product listing specifies approximately 5.2 gallons per hour of fuel consumption at rated operation.
The operating manual lists 5.42 gallons per hour, so actual fuel planning should be based on the supplied heater’s burner configuration and operating conditions.
External Fuel Supply
Unlike some smaller portable heaters with integrated tanks, the FVO-750 requires a suitable fuel supply arrangement for the installation.
Fuel storage and supply components must comply with Flagro’s operating instructions and applicable regulations.
Expected runtime depends on available fuel capacity and operating demand.
Electrical Requirements
The Flagro FVO-750 is available with 208–230V single-phase or three-phase electrical configurations.
| Configuration | Operating Current |
|---|---|
| 208–230V / Single Phase | 18 Amps |
| 208–230V / Three Phase | 14 Amps |
The 7.5 HP blower motor uses a variable-frequency drive to manage motor acceleration and deceleration.
The heater requires a compatible electrical connection and appropriately rated branch-circuit protection.
Operating current is not the same as required breaker size. Confirm the circuit, plug or wiring connection, and overcurrent protection from the manufacturer’s current documentation.
Dual 16-Inch Supply and Return Connections
The FVO-750 features dual 16-inch heated-air outlets and dual 16-inch return-air inlets.
Heated-Air Distribution
The two 16-inch supply connections allow heated air to be delivered through compatible commercial ducting.
This can support multiple distribution points or separate heating runs when properly designed.
Return-Air Connections
The two 16-inch return connections support suitable return-air arrangements.
All ductwork must maintain the required airflow through the heater.
Compatible Flagro Ducting
Flagro identifies the following accessories:
FV-HDG16 — 16-Inch Heated-Air Supply Duct
- Diameter: 16 inches
- Length: 25 feet
- Application: Compatible supply-air outlets
FV-HDV16 — 16-Inch Return-Air Duct
- Diameter: 16 inches
- Length: 25 feet
- Application: Compatible return-air inlets
Additional lengths or ducting arrangements must comply with the manufacturer’s published airflow and installation limits.
Browse Commercial HVAC Accessories
Stainless Steel Heat Exchanger
The Flagro FVO-750 features a 16-gauge 304 stainless steel heat exchanger.
During operation, heat generated by the burner transfers through the exchanger to the air being delivered by the blower.
The heat exchanger provides separation between the combustion exhaust and conditioned supply-air streams during normal operation.
This is particularly important for commercial temporary heating applications where direct combustion products are undesirable.
The flue exhaust must still be safely routed away from occupied areas and building openings.
Heavy-Duty Skid Base
The FVO-750 is a skid-mounted heater rather than a trailer-mounted system.
Its heavy-duty base includes forklift pockets accessible from all four sides.
The manufacturer lists overall dimensions of 98 inches long, 36 inches wide, and 61 inches high, with a published weight of approximately 1,400 pounds.
These features make the equipment suitable for commercial transportation, industrial staging, and temporary heating deployments using appropriately rated lifting equipment.
Safety and Installation Requirements
The FVO-750 should be installed and operated according to Flagro’s current operating instructions.
Important requirements include:
- Provide adequate combustion air and ventilation.
- Route burner exhaust through suitable certified flue piping.
- Maintain required clearances from combustible materials.
- Use only manufacturer-approved fuels.
- Ensure compatible electrical power and circuit protection.
- Inspect the fuel system before operation.
- Avoid obstructing the heater’s air intake or discharge.
- Use compatible ducting within manufacturer limits.
- Position the unit on a stable, suitable surface.
- Have qualified personnel perform burner adjustments and combustion testing when required.
Indirect-fired heating does not eliminate the need for proper ventilation or exhaust handling.
Why Choose the Flagro FVO-750?
The Flagro FVO-750 combines 750,000 BTU/hr of oil-fired heating capacity with 7,000 CFM airflow and rugged skid-mounted construction.
Its VFD-controlled blower, stainless steel heat exchanger, and dual 16-inch air connections provide flexibility for large temporary heating installations.
For contractors and industrial facilities that rely on diesel or fuel-oil heating equipment, the FVO-750 offers a high-capacity alternative to smaller portable indirect-fired heaters.
Compare Other Flagro Indirect-Fired Heaters
Climate Control Solutions offers several commercial heating options:
- Flagro FVNP-750: 750,000 BTU dual-fuel indirect-fired heater operating on propane or natural gas.
- Flagro FVO-400RC: 390,000 BTU oil-fired indirect heater with air recirculation.
- Flagro FVO-400LTRC: Trailer-mounted indirect-fired heating system with integrated generator and light tower.
Explore Commercial Heating Solutions
Frequently Asked Questions About the Flagro FVO-750
How much heat does the Flagro FVO-750 produce?
The FVO-750 provides 750,000 BTU/hr of heating capacity.
What fuel does the FVO-750 use?
The heater uses manufacturer-approved No. 1 or No. 2 fuel oil, diesel, or kerosene.
Is the FVO-750 a dual-fuel propane/natural gas heater?
No. The FVO-750 is oil-fired. Flagro offers the separate FVNP-750 for propane or natural gas applications.
How much fuel does the FVO-750 consume?
Flagro’s product listing specifies approximately 5.2 gallons per hour. The operating manual lists 5.42 gallons per hour. Confirm fuel requirements for the current equipment configuration.
Does the FVO-750 have a built-in fuel tank?
The manufacturer’s standard product listing does not identify an integrated fuel tank. Plan for an appropriate external fuel supply unless a specific package includes a separate tank.
Does the FVO-750 require three-phase power?
No. Flagro lists both 208–230V single-phase and three-phase electrical configurations.
How much airflow does the FVO-750 provide?
The manufacturer specifies 7,000 CFM with a 7.5 HP blower motor.
What is the benefit of the VFD?
The standard variable-frequency drive provides controlled blower motor startup and shutdown.
What size ducting does the FVO-750 use?
The unit has two 16-inch heated-air outlets and two 16-inch return-air inlets.
Can the FVO-750 heat commercial construction sites?
Yes. It can support large temporary heating applications when appropriately sized and installed.
Is the FVO-750 skid-mounted or trailer-mounted?
The standard FVO-750 is skid-mounted with four-sided forklift pockets.
How much does the FVO-750 weigh?
The manufacturer’s current listing gives approximately 1,400 pounds.
Request a Quote for the Flagro FVO-750
Climate Control Solutions supplies Flagro indirect-fired heaters, oil-fired construction heaters, and commercial temporary heating equipment nationwide.
Whether you need one FVO-750 for a large construction project or multiple heaters for an industrial facility, our team can assist with equipment selection, electrical configurations, fuel requirements, compatible ducting, and freight arrangements.
Contact Climate Control Solutions for current pricing and availability.
Phone: (800) 633-8711
Email: [email protected]
Trusted by Clients for Exceptional Service
Looking For Multiple Units?
Contact us using the button below and we can help you get accurate pricing for your bulk orders.
Top-Quality Brands for Superior Climate Control
At Climate Control Solutions, we prioritize quality when it comes to spot coolers, portable heat pumps, and evaporative coolers. That’s why we collaborate with some of the industry’s most respected brands to offer you the finest products. Our selection features renowned names like Airrex USA, Big Ass Fans, Cajun Kool, Cool Boss, Flagro, and Master—brands celebrated for their excellence, innovation, and durability.
