Flagro - Indirect Fired Heaters

Flagro Indirect-Fired Heaters at a Glance

Flagro offers reliable indirect-fired heaters known for delivering clean, dry heat without introducing combustion gases into the air. These heaters enhance indoor air quality and safety, making them ideal for enclosed spaces like tents, warehouses, and construction sites. Designed for durability and mobility, they operate on propane, natural gas, or fuel oil, and come with user-friendly controls, advanced safety features, and efficient heat output ranging up to 750,000 BTU/hr. Their versatility, energy efficiency, and rugged construction make them a dependable solution for temporary and large-scale heating needs.

Why Choose Flagro Indirect-Fired Heaters?

Flagro indirect-fired heaters are a top choice for safe, efficient, and reliable temporary heating solutions across various industries. These heaters deliver clean, dry, fume-free heat, making them ideal for enclosed spaces such as construction sites, warehouses, and event tents. Designed for high performance in extreme conditions, Flagro units offer easy portability, fuel efficiency, and durable construction. Our Canadian warehouse has these indirect-fired heaters. You can also check them out below:

Flagro FVNP-750 Propane/Natural Gas Indirect Fired Heater

The Flagro FVNP-750 Propane/Natural Gas Indirect Fired Heater is designed for large-scale heating using either propane or natural gas. With dual fuel capability, advanced Riello burner technology, and built-in dual voltage options (230V/1PH or 3PH), it delivers efficient, reliable performance. Its high static blower pushes 7,000 CFM of air through up to 200 feet of ducting, while a VFD-controlled fan motor ensures smooth operation. Housed on a sturdy skid base with fork pockets for easy transport, it features easy access for maintenance and is cETLus approved, making it a flexible, high-performance solution for demanding environments.

Flagro FVO-750 Oil Indirect Fired Heater

The Flagro FVO-750 Oil Indirect Fired Heater delivers 750,000 BTU of powerful, efficient heat, ideal for industrial environments. It features a durable 16-gauge stainless steel indirect-fired heat exchanger for safe exhaust, and a high static reverse inclined blower that supports ducting up to 200 feet. With 7,000 CFM airflow, a 130°F temperature rise, and a fuel-efficient Reillo burner and Tiger Loop system, it ensures consistent heating. Equipped with VFD fan control, waterproof electricals, and easy maintenance access, the FVO-750 runs on 208/230V in both 1- and 3-phase, and includes forklift pockets for convenient transport.

Flagro FVNP-400RC Propane/Natural Gas Indirect Fired Heater with Recirculating Hood

The Flagro FVNP-400RC Propane/Natural Gas Indirect Fired Heater with Recirculating Hood is a high-performance indirect-fired heater offering up to 390,000 BTU/H of heat using either propane or natural gas. Built for demanding environments, it features a durable 304 stainless steel heat exchanger, ultra-quiet backward inclined blower, and dual fuel capability for flexibility. Its Riello burner includes a cold-weather pre-heater and upgraded fuel pump for reliable start-up, while smart controls with power indicators and a volt meter enhance safety and ease of use.

FAQs

1. What is the key difference between indirect and direct-fired heaters in terms of air quality?

Indirect-fired heaters separate the combustion process from the airstream, meaning the heated air is clean and free of combustion byproducts like carbon monoxide or moisture. This makes them ideal for enclosed spaces or areas requiring high indoor air quality, such as construction sites, temporary shelters, or event venues.

2. Can indirect-fired heaters be used safely in poorly ventilated areas?

Yes, indirect-fired heaters are designed for safe use in poorly ventilated or enclosed areas because the flame and exhaust gases are contained within a heat exchanger. The clean, heated air is then blown into the space, while combustion gases are vented outside, minimizing health risks.

3. Why are indirect-fired heaters preferred for drying applications in construction?

Indirect-fired heaters provide dry, clean heat that doesn't add humidity to the air, making them perfect for drying applications such as curing concrete, drywall, or paint. Their ability to maintain consistent, moisture-free heat helps speed up drying times and reduce project delays.

4. How do fuel types impact the efficiency of indirect-fired heaters?

Indirect-fired heaters can run on diesel, natural gas, propane, or even kerosene. Fuel type impacts both cost and efficiency—propane and natural gas are typically cleaner-burning and more cost-effective for long-term use, while diesel may offer more portability for off-grid sites, but with slightly higher emissions.

5. What maintenance does an indirect-fired heater typically require?

Regular maintenance includes checking and cleaning the heat exchanger, inspecting fuel lines and filters, ensuring proper ventilation for exhaust gases, and testing safety shutoffs. Preventive maintenance ensures efficient operation, extends lifespan, and reduces the risk of breakdowns during critical use.