The Ultimate in Energy Efficient Gas Heating


Under the AIRA brand, Seeley International manufactures an extensive range of commercial direct fired and indirect gas heaters with natural gas or LPG compatibility.

Various units can be coupled with either industrial evaporative coolers, energy recovery systems and ventilation units to provide effective heating and cooling in a neat roof mounted system, making them ideal for projects where energy efficiency is a premium.

This direct fired duct furnace technology uses a stainless steel burner and is supplied with electronic ignition and On/Off or modulating flame control, complete with all fittings to comply with relevant codes for the installation of gas fired appliances. These heaters can be used internally or externally.

Typical uses are factories, schools, recreational buildings, swimming pools, warehouses, spray booths, workshops, showrooms, horticulture and large open spaces.


  • Internal or optional external installation
  • High temperature output
  • Stainless steel heat exchangers and burners for durability
  • Australian made
  • On/Off, modulating or modulating with leaving air temperature sensor
  • Range of control options
  • Optional fan blower
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Frequently Asked Questions

Ducted Gas Heating FAQs

A ducted gas heater is a type of heating system that uses natural gas to generate heat and distribute it throughout a building via a network of ducts. It typically consists of a central heating unit, ductwork, vents, and a thermostat.

A ducted gas heater operates by burning natural gas to produce heat. The heat is then transferred to the air, which is distributed through the ducts and released into different rooms or areas of the building via vents.

Ducted gas heaters are generally considered energy-efficient compared to other heating systems, such as electric heaters. Gas is often cheaper than electricity, making gas heaters a cost-effective choice for heating large spaces.

Yes, natural gas is available in certain areas of South Africa. It's important to check with your local gas supplier to determine if natural gas is accessible in your location.

Ducted gas heaters are safe when installed and maintained correctly. It's crucial to have your system installed by a licensed professional and have it regularly inspected for any gas leaks or ventilation issues. Adequate ventilation with a flu is necessary to ensure the safe operation of gas heaters.

Some benefits of ducted gas heaters include:

  • Cost-effectiveness compared to electric heating systems.
  • Quick and efficient heating.
  • Zoning capabilities, allowing you to control the temperature in different areas of your home.
  • Reliability, as gas supply is usually stable.

Yes, ducted gas heaters can be used in both residential and commercial buildings. They are commonly used in large spaces such as office buildings, warehouses, and homes with multiple rooms.

It is recommended to have your ducted gas heater serviced annually by a qualified technician. Regular maintenance ensures optimal performance, improves energy efficiency, and identifies any potential safety issues.