Flagro Direct-Fired Heaters | Cleanflow Canada Heating

Flagro Direct-Fired Heaters: Industrial Heating Solutions

When temperatures drop and projects demand consistent heat, Flagro direct-fired heaters deliver the power and reliability Canadian professionals trust. Built for the toughest conditions and backed by fast parts service, these heating solutions keep construction sites, warehouses, and facilities running when it matters most.

What are Direct-Fired Heaters?

Direct-fired heaters combust fuel directly in the airstream, delivering nearly 100% heat efficiency. Unlike indirect-fired units that separate combustion gases from heated air, direct-fired models release all combustion products into the heated space. This design makes them ideal for well-ventilated areas like construction sites, large warehouses, and outdoor applications.

What Makes Flagro Direct-Fired Heaters Your Best Choice?

Proven Canadian Performance – Founded in 1978 in St. Catharines, Ontario, Flagro understands harsh Canadian winters. Certified technicians test every heater to meet rigorous safety and regulatory standards.

Fuel Flexibility – Switch between propane and natural gas with dual-fuel models, ensuring your heating never stops regardless of fuel availability.

24/7 Reliability – Engineered with 100% flame safeguard systems, overheat protection, and electronic ignition for continuous operation when your projects can't wait.

Fast Parts Service – Minimize downtime with Flagro's proven parts program and quick turnaround times across Canada.

Understanding Direct-Fired Heater Technology

Direct-fired heaters burn fuel in an open combustion chamber, delivering nearly 100% fuel efficiency by releasing heated air directly into your workspace. This makes them ideal for:

Construction sites requiring a rapid temperature rise
Warehouses with adequate ventilation
Agricultural facilities needing high-output heating
Emergency heating situations demand immediate warmth

Key Safety Features

All Flagro direct-fired heaters include:

100% Flame Safeguard System – Automatically shuts off gas if flame is lost
Overheat Protection – Built-in thermostats prevent dangerous temperature spikes
Electronic Direct Spark Ignition – Reliable startup in cold conditions
CSA/UL Certification – Meets Canadian and North American safety standards

Top-Performing Flagro Direct-Fired Heaters Available at Cleanflow

Flagro F-1500T High-Capacity Construction Heater

Output: 1,500,000 BTU/hr
Fuel: Dual-fuel (propane/natural gas)
Applications: Large construction sites, industrial facilities
Features: Fork pockets for easy transport, thermostat control

Shop F-1500T Now

Flagro F-1000T Direct-Fired Construction Heater

Output: 1,000,000 BTU/hr
Fuel: Dual-fuel (propane/natural gas)
Applications: Mid-to-large job sites, warehouses
Features: 7,000 CFM fan, minimal combustion impurities

View F-1000T Details

Flagro F-400T Propane/Natural Gas Heater

Output: 400,000 BTU/hr
Fuel: Dual-fuel (propane/natural gas)
Applications: Medium job sites, maintenance operations
Features: Auto temperature control, 2,000-7,000 CFM airflow

Shop F-400T Today

Flagro THC-355DF Tent Heater

Output: 330,000 BTU/hr
Fuel: Dual-fuel (propane/natural gas)
Applications: Tent events, construction enclosures
Features: Ductable, quiet operation, thermostatic control

Buy THC-355DF Heater

Flagro THC-175DF Dual Fuel Tent Heater

Output: 175,000 BTU/hr
Fuel: Dual-fuel (propane/natural gas)
Applications: Smaller tents, workshops, events
Features: Fresh air circulation, multiple duct options

Shop THC-175DF

Sizing Your Flagro Direct-Fired Heater

Quick BTU Calculation:

Open/ventilated areas: 20-30 BTU per sq ft
Semi-enclosed workshops: 30-40 BTU per sq ft
Enclosed/insulated spaces: 40-50 BTU per sq ft

Example: A 2,000 sq ft construction site needs approximately 60,000-100,000 BTU capacity.

👉 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.

Cleanflow Tip: Factor in ceiling height, insulation quality, and outside temperature when sizing. When in doubt, contact Cleanflow's technical team for professional sizing support.

Fuel Options: Propane vs Natural Gas

Propane Advantages

Higher BTU content per unit
Portable tanks for remote locations
Works anywhere, no utility connection required
Reliable in extreme cold

Natural Gas Advantages

Lower cost per BTU delivered
Continuous supply via utility lines
No tank refilling required
Ideal for permanent installations

Dual-fuel models give you the flexibility to switch between fuels based on availability and cost, ensuring your heating never stops.

Safety and Ventilation Requirements

Critical Ventilation Rule: Provide 1 square inch of fresh air intake for every 1,000 BTU/hr of heater output.

Example: A 400,000 BTU heater requires 400 square inches of fresh air opening.

Important Safety Notes:

Never use direct-fired heaters in poorly ventilated spaces
Install carbon monoxide detectors in enclosed areas
Keep combustible materials away from the heater
Follow all manufacturer ventilation guidelines

Applications Across Industries

Construction & Industrial

Concrete curing and protection
Temporary building heat
Equipment warming
Worker comfort areas

Events & Entertainment

Tent heating for weddings and festivals
Outdoor venue climate control
Emergency heating solutions
Equipment frost protection

Agriculture & Commercial

Greenhouse temperature control
Livestock facility heating
Warehouse frost prevention
Emergency facility heating

Maintenance for Maximum Performance

Daily Checks

Visual inspection for gas leaks
Verify air intake clearance
Test the safety systems' operation
Check fuel supply levels

Weekly During Heavy Use

Clean burner and heat exchanger
Inspect ignition components
Verify thermostat accuracy
Check mobile components

Annual Service

Complete safety system inspection
Replace worn hoses and fittings
Test all automatic controls
Document maintenance for compliance

Why Choose Cleanflow for Your Flagro Heaters?

Authorized Canadian Distributor – We stock Flagro heaters locally for fast shipping nationwide.

Expert Technical Support – Our team provides sizing guidance, fuel recommendations, and application advice.

Fast Parts Service – Keep your heaters running with our comprehensive parts inventory and quick turnaround.

CSA Compliance Guaranteed – Every unit meets Canadian safety standards for worry-free operation.

Volume Pricing Available – Competitive rates for contractors and large operations needing multiple units.

Keep your projects on schedule this winter with Cleanflow’s Flagro Direct-Fired Heaters, reliable, CSA-compliant solutions built for Canada’s toughest conditions.

Get Your Flagro Direct-Fired Heater Today

Don't let cold weather stop your operations. Browse our complete selection of Flagro direct-fired heaters or contact our technical team for personalized sizing and application guidance.

Need immediate assistance? Call us toll-free at 1-866-335-1078 for expert advice on selecting the right heating solution for your specific needs.

Frequently Asked Questions

What is Flagro used for?

Flagro heaters are widely used in construction, agriculture, events, and industrial settings across Canada. They provide dependable, high-output heating for concrete curing, tent events, warehouses, and livestock facilities.

What are direct-fired heaters?

Direct-fired heaters burn fuel directly in the airstream, mixing gas with air at the burner for nearly 100% heating efficiency. This design delivers fast, powerful heat but requires proper ventilation since combustion byproducts enter the heated space.

What is a common application of a direct-fired heater?

Direct-fired heaters are commonly used in oil and gas, mining, petrochemical, and food processing industries, as well as construction sites, warehouses, and agricultural operations. Some models are custom-built for specialized uses like elution heaters in mining.

What are the advantages of direct heating?

Direct-fired heating systems generate heat at the point of use, eliminating transmission losses. They provide immediate, powerful warmth, are cost-effective to purchase and install, and can target specific areas needing heat without warming the entire building.

Are Flagro direct-fired heaters safe for indoor use?

Yes, when properly ventilated according to manufacturer specifications. Always ensure adequate fresh air intake and never use in tightly sealed spaces.

Can I switch between propane and natural gas on dual-fuel models?

Yes, dual-fuel models include a fuel selector valve for easy switching between propane and natural gas without tools.

How quickly can I get replacement parts?

Cleanflow stocks common maintenance items for same-day shipping across Canada. Most parts ship within 24-48 hours.

What maintenance is required for reliable operation?

Daily visual inspections, weekly cleaning during heavy use, and annual professional service ensure optimal performance and safety compliance.

Do Flagro heaters work in extreme Canadian cold?

Absolutely. Flagro heaters are built and tested in Canada specifically for harsh winter conditions, with reliable ignition down to extreme temperatures.

Flagro - Direct Fired Heaters