Frost Fighter IDH400QR Indirect Fired Heater - 400,000 BTU/h, Dual Fuel, Ultra-Quiet Operation, Long Duct Runs, High-Efficiency, CSA Cert

Frost Fighter IDH400QR Indirect Fired Heater – 400K BTU

When extreme cold threatens your operations, the Frost Fighter 400,000 BTU indirect-fired heater delivers the clean, powerful, and reliable heat you need to stay on schedule. Available from Cleanflow, your trusted Canadian supplier, this Frost Fighter IDH400QR is engineered for Canada’s toughest conditions. Combining dual-fuel flexibility with whisper-quiet operation, it is the trusted choice for construction projects, warehouses, industrial sites, event tents, and emergency shelters.

Unmatched Performance of the Frost Fighter 400,000 BTU/h Indirect Fired Heater

Massive 400,000 BTU/h Heating Capacity

The Frost Fighter IDH400QR produces up to 2,800 CFM airflow, heating large job sites efficiently. Its multi-pass stainless steel heat exchanger ensures over 81% thermal efficiency, cutting operating costs while maximizing output.

Dual-Fuel Flexibility for Any Job Site

• Oil/Diesel Model – 42-gallon tank standard (60- and 118-gallon options) for up to 22 hours of runtime.
• Propane/Natural Gas Model – EZ Ball Valve switchover for seamless propane-to-natural gas transitions.

Superior and Flexible Ducting

• Supply Ducting – Supports up to 100 ft through dual 12" outlets or single 16".
• Return Ducting – 16" intake supports up to 50 ft for recirculation and fuel savings.
• High Static Pressure – Maintains steady airflow through long duct runs.

Professional-Grade Design for Canadian Conditions

Ultra-Quiet Operation

At less than 62 dB, the Frost Fighter 400,000 BTU heater is ideal for noise-sensitive sites such as event tents and occupied buildings.

Clean, Safe, Breathable Heat

Its indirect-fired design separates exhaust gases from heated air, delivering 100% clean, dry, fume-free heat safe for enclosed environments.

Rugged, Portable Build

• Heavy-duty pneumatic tires and ergonomic handles.
• Lifting bail for secure hoisting.
• Powder-coated finish and insulated jacket improve durability and efficiency.

Technical Specifications

Ideal Applications for the Frost Fighter 400,000 BTU Heater

• Construction & Infrastructure – Concrete curing, frost protection, and ground thawing.
• Industrial & Commercial – Warehouses, manufacturing facilities, and equipment bays.
• Events & Emergency Response – Safe, quiet heat for event tents, shelters, and disaster relief operations.
• Agriculture – Barn heating, crop drying, and livestock housing.

Browse all indirect heaters and the full Frost Fighter collection at Cleanflow.

Accessories & Related Products

To get the best performance from your Frost Fighter 400 000 BTU IDH400QR, Cleanflow also supplies compatible accessories:

• Frost Fighter Thermoplastic Heat Supply Duct – Reinforced duct rated for extreme temps.
• Yellow Poly Return Duct, 25 Ft with Belt Cuff – Matches return intake, improves efficiency.
• Replacement Parts & Service Kits – Genuine Frost Fighter components for long-term reliability.

Sizing Guide: Is the Frost Fighter 400,000 BTU Heater Right for You?

• Well-Insulated Spaces: 25–30 BTU per sq. ft.
• Average Job Sites: 40–60 BTU per sq. ft.
• Drafty/Exposed Areas: 60–80 BTU per sq. ft.

Example: A 5,000 sq. ft. warehouse × 50 BTU = 250,000 BTU required → the Frost Fighter 400,000 BTU IDH400QR easily covers this, with reserve power for extreme cold.

👉 Save time and avoid manual calculations by using our free BTU calculator tool. Quickly find the ideal heater size for your space here: Cleanflow BTU Calculator

Safety and Compliance You Can Trust

• CSA Certified for Canadian safety standards.
• Cool-to-touch jacket prevents burns.
• High-limit switches guard against overheating.
• Three-trial ignition system for reliable startups.
  

Why Choose the Frost Fighter 400,000 BTU Indirect-Fired Heater from Cleanflow?

✓ Proven Canadian winter performance
✓ Dual-fuel flexibility for any site
✓ Whisper-quiet <62 dB operation
✓ Safe, clean air for occupied spaces
✓ Rugged, mobile, and CSA certified

Get Your Frost Fighter 400,000 BTU IDH400QR Indirect Fired Heater

The Frost Fighter IDH400QR delivers unmatched performance, safety, and efficiency. Available now from Cleanflow, Canada’s trusted supplier of heaters, including Frost Fighter indirect-fired heaters.

✔ Free shipping across Canada on orders over $199
✔ Expert sizing and support available from Cleanflow specialists

Shop Frost Fighter Heaters | View All Heaters | Contact Cleanflow Experts

Available for immediate shipping across North America. CSA-certified for safety and performance. Choose the Frost Fighter IDH4000QR for powerful, clean, and reliable heat when extreme weather threatens your operations.

Frequently Asked Questions

What is an indirect-fired heater?

An indirect-fired heater uses a sealed combustion chamber and heat exchanger to deliver clean, fume-free heat while venting exhaust outside.

How do indirect-fired heaters work?

The Frost Fighter IDH400QR burns fuel in a sealed chamber, transfers heat through a stainless steel exchanger, and circulates only clean, heated air.

What size heater do I need?

Multiply square footage by 40–60 BTU per sq. ft. The Frost Fighter 400,000 BTU unit covers medium-to-large job sites efficiently.

What fuels does the IDH400QR use?

Choose Oil/Diesel models with large tanks or Propane/Natural Gas models with fast EZ ball valve switchover.

Where can indirect-fired heaters be used?

Ideal for construction sites, warehouses, agriculture, events, and emergency shelters across Canada.