400K Indirect Fired Diesel Heater.png (Copy)
400K Indirect Fired Diesel Heater.png (Copy)

400K Indirect Fired LP/NG Heater

$0.00

Manufacturer: Flagro USA
Model: HCI-400G (Dual Fuel – Propane / Natural Gas)

Overview

The Flagro HCI-400G 400K Indirect Fired Heater delivers clean, high-capacity heat using propane or natural gas, making it ideal for job sites where diesel isn't preferred or where clean-burning fuel options are required. With 400,000 BTU/hr of heat output, 4,000 CFM of airflow, and ducting capabilities up to 150 feet, this heater is built for large-scale temporary HVAC applications including construction, industrial facilities, events, and emergency response.

As an indirect-fired heater, the HCI-400G keeps all combustion byproducts outside the conditioned space, delivering safe, clean, fume-free heat through a stainless-steel heat exchanger. With a rugged frame and stackable design, it is optimized for jobsite mobility, storage, and reliability.

Key Features

  • 400,000 BTU/hr heating capacity

  • Dual-fuel operation: Propane or Natural Gas

  • 4,000 CFM high-volume airflow (ductable up to 150 ft)

  • Clean, safe heat — combustion stays outdoors

  • 16 GA 304 stainless-steel heat exchanger

  • Stackable frame for efficient transport & storage

  • Backward-incline direct-drive blower for strong, consistent air output

  • Remote thermostat included (25' cord)

  • Multiple warm-air outlet sizes: (2) 12", (1) 16", (1) 20"

  • Return air inlet: 16"

  • 115V / 15A electrical requirement

Technical Specifications

(From the specification table on page 1)

Performance

  • BTU/hr: 400,000

  • Airflow: 4,000 CFM

  • Ducting: Up to 150 ft

  • Fuel Type: Propane or Natural Gas

  • Fuel Supply: External

Air Connections

  • Supply Outlets:

    • (2) 12"

    • (1) 16"

    • (1) 20"

  • Return Air Inlet: 16"

Construction & Components

  • Heat Exchanger: 16 GA, 304 stainless steel

  • Burner Technology: Riello or Beckett burner

  • Blower: Backward-incline direct drive

  • Frame: Stackable on HCI-400G

Electrical

  • Power Requirement: 115V / 15A

Dimensions & Weight

  • Size (L × W × H): 74" × 29" × 60"

  • Weight: 380 lbs

Applications

  • Construction sites & cold-weather projects

  • Industrial and warehouse heating

  • Large event tents & temporary structures

  • Emergency response & disaster relief

  • HVAC support during shutdowns or retrofits

  • Oil & gas, mining, and remote operations

Why Choose the 400K Indirect Fired LP/NG Heater?

  • Clean-burning dual-fuel capability

  • Safe, fume-free heat for indoor spaces

  • Rugged, jobsite-ready stainless-steel heat exchanger

  • High-output heater suitable for large temporary HVAC needs

  • Flexible ducting for targeted heat distribution

  • Lower emissions compared to diesel alternatives

Request More Information

Download the Product Spec Sheet or contact our team for availability, fuel-type selection, and HVAC solutions tailored to your project needs.

Manufacturer: Flagro USA
Model: HCI-400G (Dual Fuel – Propane / Natural Gas)

Overview

The Flagro HCI-400G 400K Indirect Fired Heater delivers clean, high-capacity heat using propane or natural gas, making it ideal for job sites where diesel isn't preferred or where clean-burning fuel options are required. With 400,000 BTU/hr of heat output, 4,000 CFM of airflow, and ducting capabilities up to 150 feet, this heater is built for large-scale temporary HVAC applications including construction, industrial facilities, events, and emergency response.

As an indirect-fired heater, the HCI-400G keeps all combustion byproducts outside the conditioned space, delivering safe, clean, fume-free heat through a stainless-steel heat exchanger. With a rugged frame and stackable design, it is optimized for jobsite mobility, storage, and reliability.

Key Features

  • 400,000 BTU/hr heating capacity

  • Dual-fuel operation: Propane or Natural Gas

  • 4,000 CFM high-volume airflow (ductable up to 150 ft)

  • Clean, safe heat — combustion stays outdoors

  • 16 GA 304 stainless-steel heat exchanger

  • Stackable frame for efficient transport & storage

  • Backward-incline direct-drive blower for strong, consistent air output

  • Remote thermostat included (25' cord)

  • Multiple warm-air outlet sizes: (2) 12", (1) 16", (1) 20"

  • Return air inlet: 16"

  • 115V / 15A electrical requirement

Technical Specifications

(From the specification table on page 1)

Performance

  • BTU/hr: 400,000

  • Airflow: 4,000 CFM

  • Ducting: Up to 150 ft

  • Fuel Type: Propane or Natural Gas

  • Fuel Supply: External

Air Connections

  • Supply Outlets:

    • (2) 12"

    • (1) 16"

    • (1) 20"

  • Return Air Inlet: 16"

Construction & Components

  • Heat Exchanger: 16 GA, 304 stainless steel

  • Burner Technology: Riello or Beckett burner

  • Blower: Backward-incline direct drive

  • Frame: Stackable on HCI-400G

Electrical

  • Power Requirement: 115V / 15A

Dimensions & Weight

  • Size (L × W × H): 74" × 29" × 60"

  • Weight: 380 lbs

Applications

  • Construction sites & cold-weather projects

  • Industrial and warehouse heating

  • Large event tents & temporary structures

  • Emergency response & disaster relief

  • HVAC support during shutdowns or retrofits

  • Oil & gas, mining, and remote operations

Why Choose the 400K Indirect Fired LP/NG Heater?

  • Clean-burning dual-fuel capability

  • Safe, fume-free heat for indoor spaces

  • Rugged, jobsite-ready stainless-steel heat exchanger

  • High-output heater suitable for large temporary HVAC needs

  • Flexible ducting for targeted heat distribution

  • Lower emissions compared to diesel alternatives

Request More Information

Download the Product Spec Sheet or contact our team for availability, fuel-type selection, and HVAC solutions tailored to your project needs.

Contact for Details