✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
Description
Flagro THC-355DF Direct Fired Heater – 330,000 BTU | Dual Fuel (Propane or Natural Gas)
Reliable, Ductable, Thermostat-Controlled Heat for Commercial & Industrial Jobsites
The Flagro THC-355DF is a 330,000 BTU/hr dual-fuel direct-fired heater designed for high-output heating in construction sites, large workshops, warehouses, agricultural spaces, and other open-air or ventilated industrial environments. Built with clean combustion, fuel flexibility, and quiet operation, it delivers powerful heat exactly where and when you need it without the complexity.
Flagro THC-355DF Key Features & Benefits
330,000 BTU/hr of Clean, Direct Heat
- Designed for immediate heat with no heat exchanger.
- Ideal for drying, curing, and heating large ventilated spaces.
- Low emissions and quiet operation with Riello burner technology.
Dual Fuel Operation: Natural Gas or Propane
- Switch fuel types easily with a dual-fuel gas train.
- Great for remote sites where fuel availability may vary.
- Fuel-efficient and CSA-certified for both options.
Thermostat Controlled for Comfort & Safety
- An integrated thermostat allows temperature control based on need.
- Maintains steady heat levels and improves fuel efficiency.
- Optional remote thermostat compatible (plug-and-play).
High Static Blower for Ducted Heating
- 7" blower delivers 2,650–3,000 CFM for long duct runs.
- Ductable for precise heat delivery across zones.
- Compatible with Flagro 12” x 25’ ducting for inlet & outlet.
Quiet, Low-Maintenance Operation
- Designed for quieter operation compared to competitors.
- No pilot light; uses Direct Spark Ignition for safety & reliability.
- Includes diagnostic light for quick troubleshooting.
Specifications
| Feature | Details |
|---|---|
| Heat Output | 330,000 BTU/hr |
| Fuel Type | Dual Fuel – Propane or Natural Gas |
| Blower Motor | 1 HP, 3,000 CFM |
| Fan Type | High Static Blower (Ductable) |
| Ignition System | Direct Spark Ignition |
| Thermostat Control | Yes (Integrated; remote optional) |
| Ducting | Inlet/Outlet – 12" x 25' (optional) |
| Electrical Requirements | 115V, 15A (Standard Plug) |
| Dimensions | 52” L x 27” W x 40” H |
| Weight | Approx. 210 lbs |
| Certifications | CSA Z83.7 / CSA 2.14 Approved |
Compatible Accessories
- Flagro FV-DG12 – 12” x 25’ Flexible Outlet Duct
- Flagro FV-DV12 – 12” x 25’ Flexible Inlet Duct
- Remote Thermostat Kit – For external temperature control
- Return Duct Adapter – Optional for recirculation
Applications
The Flagro THC-355DF is ideal for a wide range of commercial, industrial, and agricultural applications:
- Construction site heating
- Drywall and paint curing
- Temporary shelters & tents
- Greenhouses & barns
- Equipment thawing
- Event heating
- Warehouses & loading bays
Easy to Transport and Set Up with the Flagro THC-355DF
The Flagro THC-355DF is designed for easy mobility on the job. Its compact size and rugged wheel kit make it simple to move around busy work areas. The built-in skid base keeps it stable during operation, and integrated lifting handles make transport and setup quick and hassle-free.
Get Your Flagro THC-355DF Heater
Proudly made in North America, the Flagro THC-355DF Dual-Fuel Heater is engineered to perform in the toughest Canadian winters. With over 45 years of proven reliability, Flagro continues to lead the industry with heaters that deliver safe, efficient, and dependable heat on every jobsite.
When you order through Cleanflow, you get more than just a heater. You get expert support, fast nationwide shipping, and trusted service across Canada. Cleanflow ensures your Flagro THC-355DF arrives on time, ready to deliver high-performance, job-ready heat wherever you need it.
Frequently Asked Questions
Do I need ventilation to use this heater?
Yes. The Flagro THC-355DF is a direct-fired heater and should be used only in open, ventilated environments where air exchange can occur safely.
Can I use both propane and natural gas?
Absolutely. The dual fuel gas train allows quick switching between propane and natural gas with no hardware change. Great for flexibility on job sites.
Does it support ducting?
Yes. You can connect 12” inlet and outlet ducts up to 25 feet long for targeted heating or return air setups.
Is it loud?
No. The THC-355DF is quieter than most direct-fired heaters, making it suitable for event spaces, job trailers, and locations where noise reduction matters.
How do I know which Flagro heater model I need for my space?
Choosing the right heater depends on your space size, insulation, and local climate. To make it easy, use our BTU Calculator to estimate the required heating power for your specific jobsite or enclosure.
Do you offer shipping across Canada?
Yes! Cleanflow ships quickly across Canada. Orders over $199 qualify for free shipping, with no customs delays or hidden fees.
Manuals & Documentation
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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