Flagro THCP-DD18 Duct Diffuser 18 Inch Indirect Fired Heater

Product Description

The FLAGRO THCP-DD18 is an 18-inch duct diffuser designed as an accessory for Flagro indirect fired temporary heating systems. It attaches to the discharge end of an 18-inch duct run and distributes heated airflow across a wider area rather than directing a concentrated stream into the space. Weighing 15 pounds, this diffuser is a field-replaceable component used when setting up or servicing temporary heat systems on construction sites, tent enclosures, and other temporary structure applications. Installation is handled by HVAC technicians or mechanical contractors familiar with temporary heating equipment and ducted air distribution.

The THCP-DD18 is used with Flagro indirect fired heater models that accept 18-inch ducting, including the THC-355 series. It is a common accessory on temporary heating setups for large tents, construction enclosures, and commercial temporary climate applications where uniform air distribution is required at the duct outlet. It connects to 18-inch diameter ducting and is listed as compatible accessory hardware alongside the THCP-DA18 duct adapter and THCP-WD18 duct wing diffuser in Flagro system configurations.

Key Features

• 18-inch duct connection matches standard Flagro 18-inch ducting accessories
• Compatible with the Flagro THC-355 series indirect fired heaters
• Distributes heated air at the duct outlet to reduce concentrated airflow and improve even heat distribution
• OEM Flagro accessory part for precise fit and consistent operation with Flagro temporary heating systems
• Suited for tent, construction enclosure, and temporary structure heating setups

Compatibility

Compatible with Flagro indirect fired heaters using 18-inch ducting, including the THC-355 series. Works alongside the THCP-DA18 duct adapter and THCP-WD18 duct wing diffuser as part of the Flagro 18-inch ducting accessory lineup.

Installation Notes

This duct diffuser is installed by HVAC technicians or mechanical contractors as part of a temporary ducted heating system. Always shut down and allow the heater to cool completely before connecting or disconnecting duct accessories. Ensure the 18-inch duct connection is secure and free of gaps before returning the heater to service. Follow all applicable codes and the heater manufacturer instructions for duct accessory installation.

Technical Specifications

• Duct Connection Size: 18 inches
• Product Type: Duct Diffuser
• Application: Temporary indirect fired heating systems, tent and enclosure heating
• Weight: 15 pounds

Standard Information

• Brand: FLAGRO
• Manufacturer Part Number: THCP-DD18