Indirect Fired Heaters

Cleanflow offers a top-tier selection of indirect-fired heaters designed to deliver clean, dry, and fume-free heat in industrial, commercial, and construction settings. These heaters are ideal for enclosed spaces or areas with limited ventilation where indoor air quality is crucial. Featuring cutting-edge technology and rugged durability, our indirect-fired heaters provide high performance with safety and efficiency at the core.

Brand History

Cleanflow partners with trusted industry names like HeatStar and Flagro to offer reliable heating solutions with a proven track record. These manufacturers have been leaders in climate control equipment for decades, known for innovation, quality craftsmanship, and responsive designs that meet the needs of challenging environments. With options for diesel, propane, natural gas, and dual-fuel models, these heaters are engineered to provide consistent heat output while maintaining air purity.

Why Choose Indirect Fired Heaters from Cleanflow?

Safe Indoor Use: Sealed combustion chambers and heat exchangers prevent exposure to combustion by-products.
Versatile Fuel Options: Choose from diesel, propane, natural gas, or dual-fuel models for operational flexibility.
High Heat Output: Models available with up to 750,000 BTU/hr for large-area heating.
Portable & Durable: Designed with mobility and long-term use in mind—many include wheels, forklift pockets, and heavy-duty construction.
Ductable Design: Easily connect ducting to distribute heat over extended distances, up to 200 ft.

Best-Selling Indirect Fired Heaters Products

Heatstar

Heatstar offers portable heating solutions designed for professional construction sites and commercial applications. These heaters are known for their dependability and heavy-duty construction, making them suitable for rugged environments.

Heatstar HSP100ID Pro-Series Indirect Fired Heater - 110,000 BTU/HR

Heatstar PRO-SERIES 110,000 BTU/HR Indirect Fired Heater (Model: HSP100ID F105110) is a versatile and efficient heating solution designed for event tents, construction sites, workshops, and other spaces requiring clean and consistent heat. Its indirect heating system separates exhaust gases from heated air, providing safe and pure warmth. The heater features a durable stainless steel combustion chamber, electronic flame control, a water-resistant control box, and automatic safety devices. It includes a 17-gallon fuel tank with a consumption rate of 0.86 gallons per hour, offering extended operation.

Heatstar HSP70ID Pro-Series Indirect Fired Heater - 70,000 BTU/HR

Heatstar HSP70ID PRO-SERIES Indirect Fired Heater is a reliable heating solution for spaces requiring clean, exhaust-free air, such as event tents, construction sites, and food preparation areas. It features advanced indirect heating technology to separate exhaust gases from heated air, ensuring safety and comfort. The heater includes a stainless steel combustion chamber for durability, electronic flame control for consistent performance, and a water-resistant control box for protection against moisture. With an 11.6-gallon tank capacity, it offers extended operation at a fuel consumption rate of 0.55 gallons per hour.

Flagro

Flagro offers a range of heating solutions, including forced air heaters, radiant heaters, and indirect-fired heaters. These products are designed for commercial and residential use, providing heating for construction, warehousing, and event hosting.

Flagro FVNP-750 Propane/Natural Gas Indirect Fired Heater | 750,000 BTU

Flagro FVNP-750 is a high-capacity, dual-fuel, indirect-fired heater designed for large-scale heating applications. It features a Riello burner, dual power options, and can be ducted up to 200 feet.

Flagro FVO-750 Oil Indirect Fired Heater | 750,000 BTU, Reillo Burner

Flagro FVO-750 is an oil-fired indirect heater designed for large-scale heating needs. It boasts a Riello burner, VFD for efficiency, and can be ducted up to 200 feet. Includes forklift pockets and a Tiger Loop system for fuel efficiency and ease of operation.

Key Features and Benefits of Indirect Fired Heater

Clean Heat: Provides heat without exposing materials to combustion gases, ideal for sensitive processes.
Efficiency: Offers cost-effective heating solutions by minimizing heat loss and optimizing fuel usage.
Versatility: Suitable for diverse applications, from industrial processes to even heating.
Safety: Ensures safe working conditions by eliminating the risk of toxic gas creation and maintaining stable temperatures

Indirect Fired Heater FAQs

1. What is an indirect fired heater?
An indirect-fired heater uses a heat exchanger to transfer heat from a combustion source to the air without exposing the space to combustion gases. This results in clean, dry air—ideal for enclosed environments.

2. Can these heaters be used indoors?
Yes. Indirect-fired heaters are designed for safe indoor use because combustion gases are vented outside, ensuring clean air circulation.

3. What types of fuel do these heaters use?
Models are available in diesel, propane, and natural gas, and some offer dual-fuel capability for maximum flexibility.

4. How much space can an indirect-fired heater warm?
Depending on the model, these heaters can effectively warm large spaces such as warehouses, construction sites, and event tents, with heat outputs ranging from 400,000 to 750,000 BTU/hr.

5. Are these heaters portable?
Most models include wheels, forklift pockets, or handles for easy transport and setup.

Keep your worksites and facilities warm, safe, and efficient with Cleanflow's premium selection of indirect-fired heaters.

Indirect Fired Heaters