HTS Eclipse – ThermAir Series Air Heating Burner

Overview

The Honeywell ThermAir® is a nozzle-mixing air heating burner with an integral packaged air blower, designed to fire with fixed combustion air over a wide turndown range. Integral air and gas orifices simplify setup and adjustment, making the ThermAir one of the most straightforward burners to commission and maintain. The series spans nine models from TA0015 through TA0500, covering a capacity range of 150,000 to 5,000,000 BTU/h (44 to 1,465 kW).

ThermAir burners are engineered for direct and indirect air heating applications where fuel composition may vary widely — from 800 to 3,200 BTU/cf — without requiring nozzle changes. Their fixed-air design provides additional airflow to carry moisture away from process materials, making them especially well suited for textile ovens, process heaters, and other continuous-duty heating systems.

Features & Benefits

• Greater than 30:1 turndown ratio — enables stable operation across a wide firing range without burner adjustments
• Multi-fuel capability — fires natural gas, propane, or butane without changing the nozzle
• Fixed-air nozzle-mix combustion — simplifies setup, commissioning, and ongoing adjustment
• Integral packaged air blower — eliminates the need for a separate combustion air fan and reduces installation complexity
• Direct spark ignition — no pilot burner required, reducing components and maintenance points
• Low NOx emissions — 60 ppm at high fire
• Right- or left-hand blower configuration — adapts to existing piping arrangements
• Rear disassembly — burner can be serviced from the back without removing the entire assembly
• Global metric/English gas interface — compatible with international and domestic installations
• Multiple combustor material options — alloy tube for lower temperatures, SiC tube or refractory block for higher-temperature applications
• Multiple gas control configurations — stripped, basic (modulating valve), or complete (modulating valve + ratio regulator)
• Multiple limit switch options — high, low, high and low, or none — to match system safety requirements

Technical Specifications

• Burner type: Nozzle-mix air heating burner with packaged blower
• Capacity range: 150,000 to 5,000,000 BTU/h (44 to 1,465 kW)
• Models: TA0015, TA0025, TA0040, TA0075, TA0100, TA0200, TA0300, TA0400, TA0500
• Turndown ratio: Greater than 30:1
• Fuel types: Natural gas, propane, butane (multi-fuel without nozzle change)
• Combustion principle: Fixed-air nozzle-mix
• Ignition type: Direct spark ignition
• Ignition transformer: 6,000 to 8,000 VAC, ≥ 0.02 A, full wave output
• Flame sensor: Flame rod (TA0015–TA0100); UV scanner (all models)
• Combustion air requirements: Fresh air (20.9% O₂), clean, ≤ 150°F (65°C)
• Blower configuration: Right-hand standard; left-hand optional
• Combustor materials: Alloy tube (low temperature); SiC tube or refractory block (high temperature)
• Gas control options: Stripped / Basic (modulating valve) / Complete (modulating valve + ratio regulator)
• Control motor: Kromschröder IC 20 actuator or customer-supplied motor (≤ 2 rpm, ≥ 25 in-lb torque, 90° stroke, modulating control)
• Loading line options: Plastic, flexible braided stainless steel, or rigid stainless tube
• Limit switch options: High, low, high and low, or none
• Pipe connection type: NPT or Rc threaded
• Installation orientation: Vertical up, vertical down, or horizontal
• Altitude derating: Capacity reduced approximately 3% per 1,000 ft (300 m) above sea level
• Valve train: Main gas shut-off valve train per NFPA recommendations required

Applications

• Direct and indirect air heating systems
• Textile ovens requiring additional airflow to carry moisture from product
• Process heaters with highly variable fuel composition (800 to 3,200 BTU/cf)
• Industrial ovens and dryers requiring a wide turndown range
• Applications where multi-fuel flexibility (natural gas, propane, butane) is required without hardware changes
• OEM burner packages for process equipment manufacturers

Models / Configurations

• TA0015 – Smallest model in the ThermAir series; refer to TA0015 data sheet for capacity and dimensional data
• TA0025 – Refer to TA0025 data sheet for capacity and dimensional data
• TA0040 – Refer to TA0040 data sheet for capacity and dimensional data
• TA0075 – Refer to TA0075 data sheet for capacity and dimensional data
• TA0100 – Refer to TA0100 data sheet for capacity and dimensional data
• TA0200 – Refer to TA0200 data sheet for capacity and dimensional data
• TA0300 – Refer to TA0300 data sheet for capacity and dimensional data
• TA0400 – Refer to TA0400 data sheet for capacity and dimensional data
• TA0500 – Largest model in the ThermAir series; refer to TA0500 data sheet for capacity and dimensional data

Each model is available in stripped, basic, or complete gas control configurations, with right- or left-hand blower orientation, and choice of combustor material to suit temperature requirements.

ThermAir Accessories

• Kromschröder IC 20 Actuator – Factory-recommended control motor for modulating applications; ≤ 2 rpm, ≥ 25 in-lb torque, 90° stroke
• UV Scanner – Available on all ThermAir models as an alternative or supplement to the standard flame rod sensor
• Ratio Regulator – Included in the “Complete” gas control configuration to maintain air/gas ratio across the firing range
• Flexible Braided Stainless Steel Loading Line – Alternative to standard plastic loading line for higher-temperature or more demanding installations
• Rigid Stainless Tube Loading Line – For installations requiring a fixed, non-flexible gas supply connection
• SiC Combustor Tube – High-temperature combustor option for elevated process temperature applications
• Refractory Block Combustor – High-temperature combustor option for radiant or very high-temperature applications

Documentation