Flagro FVNP-750 – 750,000 BTU Indirect Fired Heater-Dual Fuel – Skid Base
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The Flagro FVNP-750 750,000 BTU Dual-Fuel Indirect-Fired Heater provides high-capacity temporary heating for construction sites, warehouses, industrial facilities, and commercial projects. Its propane/natural gas compatibility and skid-mounted design offer flexibility for demanding heating applications.
Key Specifications:
- Heating: 750,000 BTU/hr
- Fuel: Propane or Natural Gas
- Airflow: 7,000 CFM
- Electrical: 208–230V Single or Three Phase
- Fan Motor: 7.5 HP with VFD Soft Start
- Heat Exchanger: 16-Gauge 304 Stainless Steel
- Duct Connections: Dual 16″ Supply and Return
- Weight: Approximately 1,400 lbs
Features: Direct spark ignition, four-sided forklift pockets, and cETLus certification.
Nationwide shipping available. Contact us for pricing and availability.
The Flagro FVNP-750 750,000 BTU Dual-Fuel Indirect-Fired Heater delivers high-capacity temporary heating for construction sites, warehouses, industrial facilities, and large commercial projects. Designed for demanding applications, this skid-mounted heater provides 750,000 BTU/hr of heating capacity and 7,000 CFM of airflow for efficient distribution of warm air.
The FVNP-750 operates on propane or natural gas, allowing contractors and facility operators to select a fuel source based on availability and project requirements. Its dual-fuel system provides greater flexibility than heaters restricted to a single fuel type.
The heater features a 16-gauge 304 stainless steel heat exchanger, direct spark ignition, and a 7.5 HP blower motor with a standard variable-frequency drive (VFD) for controlled motor startup.
With dual 16-inch heated-air outlets, dual 16-inch return-air connections, and a rugged skid base with four-sided forklift pockets, the Flagro FVNP-750 is designed for high-volume temporary heating and convenient jobsite handling.
Key Features of the Flagro FVNP-750
- 750,000 BTU/hr Heating Capacity: High-output temporary heating for large commercial and industrial applications.
- Dual-Fuel Operation: Compatible with propane and natural gas.
- Indirect-Fired Heating: Uses a heat exchanger to keep normal burner combustion exhaust separate from the delivered heated air.
- 7,000 CFM Airflow: Provides substantial airflow for commercial heating and ducted distribution.
- 7.5 HP Blower Motor: Supports high-volume heated-air circulation.
- VFD Soft Start: Variable-frequency drive helps control blower motor startup.
- 208–230V Electrical Options: Available in single-phase and three-phase configurations.
- 304 Stainless Steel Heat Exchanger: Constructed from durable 16-gauge stainless steel.
- Direct Spark Ignition: Provides automatic burner ignition.
- Dual 16-Inch Supply Outlets: Supports heated-air distribution through compatible ducting.
- Dual 16-Inch Return-Air Inlets: Supports suitable return-air and recirculation arrangements.
- Skid-Mounted Design: Four-sided forklift pockets simplify equipment handling.
- cETLus Listed: Manufacturer-listed certification.
- Commercial Construction: Built for demanding temporary heating environments.
Dual-Fuel Propane and Natural Gas Operation
The Flagro FVNP-750 offers the flexibility to operate on either propane or natural gas.
This makes it useful for commercial projects where the available fuel supply varies by location.
Propane Operation
When operating on propane, the FVNP-750 provides 750,000 BTU/hr of heating input.
Published propane specifications:
- Fuel: Propane
- Consumption: 37 lbs/hr at rated operation
- Manifold Pressure: 1.5″ W.C.
An appropriately sized external propane supply, approved regulator, and compatible fuel connections are required.
Natural Gas Operation
The FVNP-750 can also operate on natural gas.
Published natural gas specifications:
- Fuel: Natural Gas
- Consumption: 806 cubic feet per hour
- Manifold Pressure: 2.2″ W.C.
Natural gas supply capacity, pressure, and connections must meet the manufacturer’s requirements.
The heater includes dual-fuel capability, but fuel changes must follow Flagro’s approved operating procedure. Never switch or connect fuel supplies without following the manufacturer’s instructions.
Indirect-Fired Heating for Commercial Applications
The FVNP-750 uses an indirect-fired heating system.
Unlike direct-fired heaters that release combustion products into the heated airflow, the FVNP-750 transfers heat through a stainless steel heat exchanger.
During normal operation, the heat exchanger separates burner combustion gases from the air delivered to the conditioned space.
This design is particularly useful for temporary heating applications where direct exposure to combustion exhaust is undesirable.
Benefits of Indirect-Fired Heating
- Separates normal combustion exhaust from supplied heated air
- Avoids directly adding combustion moisture to the supply-air stream
- Supports ducted temporary heating installations
- Provides high-capacity airflow for commercial spaces
- Accommodates compatible return-air arrangements
Important: Combustion exhaust must still be safely discharged away from occupied areas, building openings, and ventilation intakes. Proper combustion air, clearances, and installation procedures are required.
Common Applications for the Flagro FVNP-750
Large Construction Sites
Construction projects frequently require temporary heating during colder weather, renovations, and building operations.
The Flagro FVNP-750 provides high-capacity heating for appropriately sized construction environments.
Common applications include:
- Commercial building construction
- Winter construction projects
- Large temporary work enclosures
- Building renovations
- Industrial construction sites
- Temporary heating during HVAC installation
Its skid-mounted construction and forklift pockets simplify movement between suitable jobsites.
Warehouses and Distribution Centers
Large warehouse and distribution facilities may need supplemental heating during extreme temperatures, equipment maintenance, or HVAC outages.
With 750,000 BTU/hr of heating capacity and 7,000 CFM of airflow, the FVNP-750 can support properly designed temporary heating systems.
Compatible ducting allows heated air to be directed toward specific work areas or distribution points.
Industrial and Manufacturing Facilities
Industrial equipment, production processes, and facility maintenance may require temporary heating during shutdowns or seasonal operations.
The FVNP-750 provides a high-capacity heating option for suitable manufacturing and industrial installations.
Temporary Structures and Commercial Tents
The heater can support appropriately designed heating systems for temporary structures and commercial tents.
Its indirect-fired design allows heated air to be supplied separately from the burner exhaust stream.
For occupied temporary structures, heater placement, ventilation, ducting, fuel supply, and fire-safety requirements must be evaluated before installation.
Emergency and Temporary Heating
The Flagro FVNP-750 is also suitable for appropriately designed temporary heating during:
- Commercial HVAC failures
- Industrial maintenance
- Facility renovations
- Planned heating-system shutdowns
- Winter construction
- Emergency commercial heating requirements
Explore Commercial Heating Applications
Flagro FVNP-750 Technical Specifications
| Specification | Flagro FVNP-750 |
|---|---|
| Model Number | FVNP-750 |
| Equipment Type | Dual-Fuel Indirect-Fired Heater |
| Heating Capacity | 750,000 BTU/hr |
| Fuel Type | Propane / Natural Gas |
| Propane Consumption | 37 lbs/hr |
| Natural Gas Consumption | 806 CFH |
| Propane Manifold Pressure | 1.5″ W.C. |
| Natural Gas Manifold Pressure | 2.2″ W.C. |
| Power Supply — Single Phase | 208–230V |
| Current Draw — Single Phase | 18 Amps |
| Power Supply — Three Phase | 208–230V |
| Current Draw — Three Phase | 14 Amps |
| Fan Motor | 7.5 HP |
| Air Circulation | 7,000 CFM |
| Fan Control | VFD Standard |
| Heat Exchanger | 16-Gauge 304 Stainless Steel |
| Ignition | Direct Spark |
| Heated-Air Outlets | Two 16″ Diameter |
| Return-Air Inlets | Two 16″ Diameter |
| Fuel Tank | External Fuel Supply Required |
| Mounting | Skid Base |
| Forklift Pockets | Four-Sided |
| Length | 98″ |
| Width | 36″ |
| Height | 61″ |
| Weight | Approximately 1,400 lbs |
| Certification | cETLus |
Specifications reflect Flagro’s published FVNP-750 product information. Electrical protection, fuel supply pressure, ducting limitations, and other installation requirements must be verified against the manufacturer’s current operating manual and equipment nameplate.
Electrical Requirements
The Flagro FVNP-750 is available with 208–230V single-phase or three-phase electrical configurations.
| Electrical Configuration | Published Current Draw |
|---|---|
| 208–230V / Single Phase | 18 Amps |
| 208–230V / Three Phase | 14 Amps |
The heater includes a 7.5 HP blower motor with a standard VFD for controlled startup.
The electrical supply must be compatible with the selected equipment configuration.
Important: Current draw is not the same as the required circuit-breaker rating. Confirm the circuit protection, wiring, and electrical connection requirements against Flagro’s installation instructions and the supplied unit’s nameplate.
Air Distribution and Ducting
The FVNP-750 features dual 16-inch heated-air outlets and dual 16-inch return-air connections.
These connections provide flexibility for high-capacity temporary heating installations.
Dual 16-Inch Heated-Air Outlets
Two 16-inch outlets allow heated air to be distributed through suitable ducting.
This arrangement can support separate heating runs or multiple air-distribution points.
Dual 16-Inch Return-Air Connections
The heater also includes two 16-inch return-air connections.
These can support approved return-air and recirculation configurations when installed according to the manufacturer’s instructions.
Compatible Flagro Ducting
Flagro identifies the following duct accessories for this heater:
FV-HDG16 — 16-Inch High-Temperature Supply Duct
- Diameter: 16 inches
- Length: 25 feet
- Application: Compatible heated-air discharge connections
FV-HDV16 — 16-Inch Return-Air Duct
- Diameter: 16 inches
- Length: 25 feet
- Application: Compatible return-air connections
Duct quantities, maximum total lengths, connections, and allowable airflow restrictions must follow the current manufacturer documentation.
Browse Commercial HVAC Accessories
Skid-Mounted Construction
The Flagro FVNP-750 is built on a rugged skid base rather than a trailer.
Four-sided forklift pockets allow the unit to be handled from multiple directions with suitable lifting equipment.
The heater measures 98 inches long, 36 inches wide, and 61 inches high, with a published weight of approximately 1,400 pounds.
Its skid-mounted design is useful for:
- Commercial equipment transportation
- Temporary construction installations
- Industrial site deployment
- Warehouse equipment staging
- Moving between heating projects
Appropriate lifting equipment and safe handling practices are required.
Fuel Consumption and External Supply Requirements
Unlike trailer-mounted heaters with integrated fuel tanks, the FVNP-750 requires an external propane or natural gas supply.
Published Fuel Consumption
| Fuel | Consumption at Rated Operation |
|---|---|
| Propane | 37 lbs/hr |
| Natural Gas | 806 cubic feet/hr |
Actual fuel usage may be lower when burner operation is cycled according to heating demand.
The fuel supply must deliver adequate pressure and volume to support the full heating load.
Expected operating time depends on the available propane storage or natural gas supply arrangement.
Safety and Installation Considerations
The FVNP-750 is professional commercial heating equipment and should be installed according to Flagro’s operating manual.
Important considerations include:
- Provide adequate combustion air and ventilation.
- Safely discharge burner exhaust away from occupied areas.
- Maintain manufacturer-required clearances from combustible materials.
- Follow approved propane and natural gas connection procedures.
- Confirm proper fuel supply pressures.
- Use appropriately sized electrical service.
- Do not obstruct heater air intakes or discharge connections.
- Follow the manufacturer’s approved ducting limitations.
- Position the skid securely on a suitable supporting surface.
- Perform installation and maintenance through qualified personnel as required.
Indirect-fired heating does not eliminate the need for ventilation or safe combustion exhaust handling.
Why Choose the Flagro FVNP-750?
The Flagro FVNP-750 combines 750,000 BTU/hr heating capacity with dual-fuel flexibility, substantial airflow, and skid-mounted construction.
Its propane and natural gas compatibility makes it useful for commercial contractors and industrial facilities with different fuel supply arrangements.
The VFD-controlled 7.5 HP blower, stainless steel heat exchanger, and dual 16-inch duct connections provide the flexibility needed for large temporary heating installations.
Compare Other Flagro Indirect-Fired Heaters
Climate Control Solutions supplies additional Flagro commercial heating equipment:
- Flagro FVO-750: 750,000 BTU/hr oil-fired indirect heater for diesel/fuel-oil applications.
- Flagro FVNP-400RC: Smaller-capacity propane/natural gas indirect-fired heater.
- Flagro FVO-400RC: 390,000 BTU/hr oil-fired indirect heater.
- Explore Commercial Heating Solutions
Frequently Asked Questions About the Flagro FVNP-750
How much heat does the Flagro FVNP-750 produce?
The FVNP-750 delivers 750,000 BTU/hr of rated heating input.
Does the FVNP-750 operate on propane and natural gas?
Yes. It is a dual-fuel indirect-fired heater designed for approved propane or natural gas operation.
What is the difference between the FVNP-750 and FVO-750?
The FVNP-750 operates on propane or natural gas, while the FVO-750 is designed for approved fuel oil.
How much airflow does the FVNP-750 provide?
The manufacturer specifies 7,000 CFM with a 7.5 HP blower motor.
Does the FVNP-750 have a built-in fuel tank?
No. The heater requires an external propane or natural gas supply.
How much fuel does the FVNP-750 consume?
Flagro lists approximately 37 lbs/hr of propane or 806 CFH of natural gas at rated operation.
Does the FVNP-750 require three-phase power?
Not necessarily. The heater is available in both 208–230V single-phase and three-phase configurations.
Does the heater include soft-start motor control?
Yes. Flagro lists a standard variable-frequency drive for the blower.
What size duct connections does the FVNP-750 have?
The heater includes two 16-inch supply-air outlets and two 16-inch return-air inlets.
Can the FVNP-750 heat large construction sites?
Yes, for appropriately sized and designed temporary heating applications. Actual requirements depend on heat loss, outside temperatures, ventilation, and installation conditions.
Is the FVNP-750 trailer-mounted?
No. The FVNP-750 is skid-mounted with four-sided forklift pockets.
How much does the FVNP-750 weigh?
Flagro’s product listing gives approximately 1,400 pounds.
Request a Quote for the Flagro FVNP-750
Climate Control Solutions supplies Flagro indirect-fired heaters, dual-fuel heating equipment, and temporary commercial HVAC solutions nationwide.
Whether you need one FVNP-750 for a major construction project or multiple heaters for an industrial facility, our team can assist with fuel configurations, electrical requirements, compatible ducting, and shipping.
Contact Climate Control Solutions for current pricing, availability, and project-specific quotes.
Phone: (800) 633-8711
Email: [email protected]
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