Electric Air Duct Heater
Finned Elements
Cynebar Electric Duct Heaters can be custom made to suit your dimensions, utilizing of large range of stocked finned elements formed as a ‘U’ shape or ‘W’ shape. Locally Australian designed and fabricated in Brisbane to suit your application and requirements as a single phase or 3 phase unit. Option to offer SCR Control, SCR can be mounted in duct heater terminal box. Also provide over temperature thermostat and pressure switch protection as well as supply as a complete duct heater assembly in 900mm long casing to make installation easier.
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Australian Standards & Technical Specifications for Electric Duct Heaters
Backer Cynebar Ohmic designs and manufactures Electric Duct Heaters to suit the requirements of Australian HVAC and industrial air handling systems. All duct heaters are engineered with a focus on safety, performance, reliability, and compliance with applicable Australian electrical and engineering standards.
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Compliance with Australian Standards
Electric duct heaters installed in Australia should be designed and manufactured in accordance with relevant standards, including:
AS/NZS 3102 – Approval and test specification requirements for electric inline and duct-type heaters.
Applicable electrical installation requirements under the AS/NZS 3000 Wiring Rules.
Project-specific HVAC, mining, infrastructure, defence, and industrial specifications where required.
Compliance with these standards helps ensure safe operation, reliable temperature control, and long service life.
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Technical Specifications
Heating Capacity
Backer Cynebar Ohmic duct heaters are available in a wide range of capacities, including:
Small HVAC systems from approximately 0.25 kW
Commercial and light industrial systems up to 30 kW
Large custom-engineered industrial heaters exceeding 100 kW
Heater capacity is selected based on airflow, inlet temperature, required temperature rise, and operating duty cycle.
Electrical Supply Options
Single-Phase Heaters
240V supply
Typically up to 3.6 kW
Suitable for smaller HVAC and commercial applications
Three-Phase Heaters
415V supply
Balanced load design across phases
Suitable for medium and large commercial systems
High-capacity industrial configurations available
Construction & Materials
Backer Cynebar Ohmic duct heaters are manufactured using robust industrial-grade materials designed for long service life and dependable performance.
Available construction options include:
Galvanised steel casings
304 stainless steel construction
316 stainless steel construction
Custom corrosion-resistant materials
Insulated casing designs can be provided where required to minimise external heat loss and improve energy efficiency.
Heating Elements
Our duct heaters utilise high-quality tubular or finned tubular heating elements manufactured using premium resistance wire and alloy sheath materials.
Benefits include:
Uniform heat distribution
Long operating life
Controlled sheath temperatures
Reduced maintenance requirements
Reliable continuous-duty performance
Element loading is carefully selected to suit airflow conditions, operating temperatures, and application requirements.
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Airflow Requirements
Adequate airflow is critical to safe duct heater operation and maximum service life.
Design considerations typically include:
Minimum airflow velocity requirements
Air temperature rise calculations
Pressure drop considerations
Uniform airflow distribution across the heating elements
To protect the heater and air handling system, duct heaters can be supplied with:
Differential pressure airflow switches
Fan interlocks
Air proving switches
Building Management System (BMS) integration
These safety systems automatically isolate power if airflow falls below acceptable operating limits.
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Safety Features
All Backer Cynebar Ohmic duct heaters can be supplied with multiple layers of protection.
Primary Protection
Automatic-reset temperature limiting controls
Integrated temperature monitoring
Secondary Protection
Manual-reset thermal cut-outs
Independent high-limit temperature protection
Optional Safety Features
Airflow proving switches
SCR power control
Contactor monitoring
Earth leakage protection
Emergency shutdown inputs
BMS and PLC safety interlocks
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Installation Considerations
For optimum performance and reliability, consideration should be given to:
Adequate straight duct lengths upstream and downstream
Uniform airflow distribution
Access for maintenance and inspection
Temperature sensor placement
Electrical isolation requirements
Our engineering team can assist with heater sizing, airflow calculations, and installation recommendations to ensure correct integration into the overall air handling system.
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Custom Engineered Solutions
Backer Cynebar Ohmic specialises in custom-designed electric duct heaters for:
Air Handling Units (AHUs)
HVAC systems
Mining ventilation
Make-up air systems
Process air heating
Drying applications
Cleanrooms
Industrial manufacturing facilities
Available configurations include:
Rectangular duct heaters
Circular duct heaters
Multi-stage heaters
SCR-controlled systems
Stainless steel construction
High-temperature process air heaters
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Need Help Sizing an Electric Duct Heater?
Selecting the right duct heater requires accurate assessment of:
Airflow (L/s or m³/hr)
Inlet and outlet temperatures
Available electrical supply
Duct dimensions
Control requirements
Site operating conditions
Contact Backer Cynebar Ohmic today for expert assistance with heater sizing, thermal calculations, and custom-engineered electric duct heating solutions manufactured in Brisbane, Australia. Our team can provide a technically optimised solution tailored to your HVAC or industrial process heating application.
FAQ
Frequently asked questions
Interested in finned elements?
Tell us about your application and our engineers will find the right solution.