Flagro THC-85P Ductable Direct Fired Heater
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The Flagro THC-85P 85,000 BTU Propane Direct-Fired Heater provides portable heating for commercial tents, construction sites, and temporary structures with appropriate ventilation. It includes thermostatic controls, a 20-foot remote thermostat cord, and a propane hose and regulator.
Key Specifications:
- Heating Capacity: 85,000 BTU/hr
- Fuel: Propane
- Airflow: 450 CFM
- Electrical: 115V / 60Hz
- Ignition: Direct Spark
- Thermostat: Included, 20′ Cord
- Weight: 122 lbs
- Ducting: Optional 12″ × 12′ Manufacturer-Approved Duct
Features: Fan-only air circulation mode, portable construction, and cETLus certification.
Nationwide shipping available. Contact us for pricing and availability.
The Flagro THC-85P 85,000 BTU Propane Direct-Fired Heater provides reliable temporary heating for construction projects, commercial tents, temporary structures, and other properly ventilated commercial applications. Designed for portability and convenient operation, this ductable propane heater combines thermostatic temperature control, 450 CFM airflow, and direct spark ignition in a compact, rugged cabinet.
The THC-85P operates on propane and requires a compatible 115V electrical supply to power its blower and controls. A remote thermostat with a 20-foot cord is included, allowing temperature adjustments from a convenient location.
The heater also includes a 15-foot propane hose and single-stage regulator. With optional manufacturer-approved ducting, heated air can be directed toward specific areas where temporary heating is needed.
Whether you’re providing heat for a construction project, maintaining temperatures in a temporary enclosure, or supporting a commercial event, the Flagro THC-85P offers a portable 85,000 BTU heating solution.
Key Features of the Flagro THC-85P
- 85,000 BTU/hr Heating Capacity: Provides temporary heat for suitable commercial, construction, and tent applications.
- Propane-Fired Operation: Designed for propane fuel with a compatible external supply.
- Direct-Fired Heating: Provides heated airflow without a separate flue system.
- 450 CFM Air Circulation: Distributes warm air through the heater’s integrated blower.
- Thermostatic Temperature Control: Helps maintain the selected temperature during operation.
- Included Remote Thermostat: Features a 20-foot cord for flexible thermostat placement.
- Direct Spark Ignition: Provides automatic burner ignition.
- 115V Electrical Operation: Uses compatible standard-voltage electrical service for the blower and controls.
- Included Fuel Accessories: Supplied with a 15-foot propane hose and single-stage regulator.
- Optional Ducting: Compatible with Flagro’s specified 12-inch high-temperature ducting and accessories.
- Fan-Only Mode: Allows air circulation without operating the burner.
- Portable Construction: Compact design for temporary installations and jobsite transportation.
- cETLus Listed: Manufacturer-listed certification for the specified heater configuration.
Thermostatically Controlled Temporary Heating
The Flagro THC-85P includes thermostatic control to help regulate temperatures in suitable temporary heating applications.
The included thermostat features a 20-foot cord, allowing it to be positioned away from the heater at an appropriate monitoring location.
When operating in thermostat mode, the heater cycles according to the selected temperature and its operating controls.
This makes the THC-85P useful for construction projects and temporary structures where temperatures must be managed during colder weather.
Direct-Fired Propane Heating
The THC-85P is a direct-fired propane heater.
Unlike an indirect-fired heater that transfers heat through a heat exchanger and vents combustion exhaust separately, a direct-fired heater releases combustion products into its heated airflow.
This design makes proper ventilation, combustion-air supply, and approved installation especially important.
The THC-85P must only be used in locations permitted by its manufacturer instructions and applicable safety requirements.
Important: The THC-85P is not a residential heater and must not be used in sealed or inadequately ventilated occupied spaces. Always follow the manufacturer’s operating instructions, ventilation requirements, and local regulations.
Common Applications for the Flagro THC-85P
Construction Site Heating
Construction projects often require temporary heat during colder weather.
The Flagro THC-85P can provide heating for appropriate, adequately ventilated construction areas during building projects, maintenance, and seasonal work.
Potential uses include:
- Temporary construction heating
- Renovation projects
- Building maintenance
- Jobsite work areas
- Construction-related temporary enclosures
Installation must follow the manufacturer’s instructions regarding ventilation, combustible clearances, and fuel connections.
Commercial Tent Heating
Flagro markets the THC-85P for commercial tent heating applications.
Its thermostat and optional ducting accessories help direct heated air toward an approved temporary tent installation.
The heater’s suitability depends on enclosure design, ventilation, occupancy, fire safety requirements, and applicable codes.
Heater location, fuel supply, air intake, and ducting must be planned carefully, especially for events attended by the public.
Temporary Commercial Structures
The THC-85P can support heating in suitable temporary commercial structures and industrial applications.
Its compact cabinet and portable design make it useful when permanent heating equipment is unavailable or when temporary heat is required.
Supplemental Jobsite Air Circulation
The THC-85P also provides a fan-only operating mode.
This allows the integrated blower to circulate air without activating the propane burner.
Explore Commercial Heating Applications
Flagro THC-85P Technical Specifications
| Specification | Flagro THC-85P |
|---|---|
| Model | THC-85P |
| Heater Type | Ductable Direct-Fired Heater |
| Fuel | Propane |
| Heating Capacity | 85,000 BTU/hr |
| Heating Method | Direct-Fired |
| Electrical Supply | 115V / 60Hz / Single Phase |
| Manufacturer-Listed Electrical Requirement | 15 Amps |
| Air Circulation | 450 CFM |
| Ignition System | Direct Spark |
| Thermostat Control | Included |
| Thermostat Cord | 20 Feet |
| Propane Hose | 15 Feet, Included |
| Regulator | Single-Stage, Included |
| Length | 31″ |
| Width | 22″ |
| Height | 27″ |
| Weight | 122 lbs |
| Optional Ducting | 12″ × 12′ High-Temperature Duct |
| Fan-Only Operation | Yes |
| Certification | cETLus |
Specifications are based on Flagro’s published THC-85P product information. Consult the current unit nameplate and installation manual for fuel pressure, electrical service, ventilation, clearances, and operating instructions.
Propane Fuel Requirements
The Flagro THC-85P operates on propane fuel.
The heater includes a manufacturer-supplied 15-foot propane hose and single-stage regulator.
A suitable external propane supply must be provided.
Fuel supply installation must follow the manufacturer’s instructions, including appropriate propane pressure, approved hose assemblies, regulator compatibility, cylinder placement, and leak testing.
The THC-85P is a propane model. It should not be connected to natural gas or converted to another fuel without an expressly approved manufacturer procedure and equipment configuration.
For customers requiring natural gas operation, Flagro identifies a separate THC-85N model.
For customers needing a dual-fuel propane/natural gas heater, consider the larger Flagro THC-175DF.
Electrical Requirements
The THC-85P requires electrical power for its integrated blower, ignition, and controls.
Flagro lists 115V / 60Hz single-phase power with a 15-amp electrical requirement in its product specifications.
Confirm the correct circuit and grounded receptacle requirements against the current operating manual and equipment nameplate before installation.
Any electrical connections must be protected from moisture, physical damage, and other jobsite hazards.
Optional Ducting and Accessories
Flagro offers manufacturer-specific accessories for directing heated airflow.
THCP-WD12 — 12-Inch High-Temperature Duct
The THCP-WD12 is a 12-inch-diameter, 12-foot-long high-temperature duct designed for compatible Flagro tent heaters.
The THC-85P operating instructions limit the heater to a maximum of 12 feet of the specified ducting.
Use only manufacturer-approved ducting and follow all airflow and clearance requirements.
THCP-DA12 — Duct Adapter
The THCP-DA12 duct adapter is designed for compatible ducted heating configurations.
Contact Climate Control Solutions for pricing and availability.
THCP-DD — Duct Diffuser
The THCP-DD diffuser supports compatible heated-air distribution arrangements.
THCP-HD85 — Heater Diffuser
The THCP-HD85 diffuser is a manufacturer-listed accessory for the THC-85P.
Browse Commercial HVAC Accessories
Safety and Ventilation Requirements
Because the THC-85P is a direct-fired combustion heater, proper installation and ventilation are essential.
Before operating the heater:
- Provide adequate fresh combustion and ventilation air.
- Follow all manufacturer instructions regarding heater placement and clearances.
- Use only approved propane supply equipment.
- Keep combustible materials away from the heater and heated-air discharge.
- Do not obstruct the heater’s combustion-air intake or airflow.
- Follow local fire, building, and fuel-gas requirements.
- Use only manufacturer-approved ducting and accessories.
- Inspect fuel hoses and equipment before operation.
- Observe occupancy restrictions and any required carbon monoxide monitoring.
Direct-fired propane heating is not appropriate for every building or enclosure.
Applications involving occupied event tents, enclosed workspaces, or sensitive environments should be evaluated for proper ventilation, applicable approvals, and fire safety compliance before equipment selection.
Why Choose the Flagro THC-85P?
The Flagro THC-85P provides 85,000 BTU/hr of portable propane heat in a compact heater designed for temporary commercial applications.
Its included thermostat, remote control cord, propane hose, regulator, and optional ducting accessories make it useful for properly designed construction and commercial tent heating installations.
The fan-only operating mode also allows the unit to circulate air when burner heat is not required.
Compare Other Flagro Heaters
Climate Control Solutions supplies additional commercial heating equipment for a variety of applications.
- Flagro THC-175DF: 175,000 BTU/hr dual-fuel direct-fired heater.
- Flagro THC-355CDF: 330,000 BTU/hr dual-fuel direct-fired heater.
- Explore Commercial Heating Applications
Frequently Asked Questions About the Flagro THC-85P
How much heat does the Flagro THC-85P produce?
The THC-85P provides 85,000 BTU/hr of heating capacity.
Does the THC-85P operate on propane or natural gas?
The THC-85P is a propane heater. Flagro identifies a separate THC-85N natural gas model.
Is the Flagro THC-85P dual-fuel?
No. The THC-85P is not the dual-fuel version. Flagro offers the THC-175DF for applications requiring propane and natural gas flexibility.
Does the THC-85P include a thermostat?
Yes. The heater includes thermostatic control with a 20-foot remote thermostat cord.
Does the heater include a propane hose and regulator?
Yes. Flagro lists a 15-foot propane hose and single-stage regulator as included equipment.
How much airflow does the THC-85P provide?
The integrated blower circulates approximately 450 CFM of air.
Can the THC-85P be connected to ducting?
Yes. The heater supports compatible manufacturer-approved ducting, including the THCP-WD12 12-inch high-temperature duct.
The operating instructions limit ducting to the manufacturer’s specified 12-foot maximum.
Can the THC-85P operate as a fan without heating?
Yes. The heater includes a fan-only operating mode.
Can the THC-85P be used inside an enclosed tent?
Only when the specific installation complies with the manufacturer’s ventilation, occupancy, fuel-supply, and safety requirements. Direct-fired heaters release combustion products into the heated airflow.
What electrical service does the THC-85P require?
Flagro lists 115V / 60Hz single-phase electrical power. Confirm the circuit requirements against the current equipment manual and nameplate.
What are the dimensions and weight?
The manufacturer lists dimensions of 31″ L × 22″ W × 27″ H and a weight of 122 lbs.
Request a Quote for the Flagro THC-85P
Climate Control Solutions supplies Flagro direct-fired heaters, commercial heating equipment, and temporary climate control solutions nationwide.
Whether you need one THC-85P for a construction project or multiple heaters for a commercial application, our team can help with equipment selection, compatible accessories, and freight arrangements.
Contact Climate Control Solutions for current pricing and availability.
Phone: (800) 633-8711
Email: [email protected]
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