Frequently Asked Questions

* Visit the product page to find the right product for your system size.

Gelair technology allows the benefits of Tea Tree Oil to be delivered to hard to reach areas including ducted air-conditioning systems. Our products deliver complete, 360° treatment for your entire system.

Treatment Option	Air	Whole AHU System & Condensate Tray	Ducts	Diffusers
Gelair
UV Technology
Silver Ion Filters
Electrostatic Filters
HEPA Filters
Ionizers

Generally, our products last up to 12 weeks. However, there are environmental factors that will reduce their lifespan. These typically include:

• Temperature
• Relative humidity
• Airflow
• Continuous system operation

If you reside in a tropical or sub-tropical region you may need to replace your Gelair products every 4 weeks.

Factors can vary depending on the product so please check the individual product page for specific lifespan and factor details.

If you need more information visit Contact Us for ways to get in touch with the Gelair team.

Our air-conditioning system product performance and calculations are based on standard system operation defined as less than 10 hours per 24 hour period.

All Gelair products are designed for safe use when handled and applied as directed.

Pure Tea Tree Oil is a well-established natural compound, derived from the steam distillation of the oil from Melaleuca alternifolia, a native Australian Tea Tree species.

It is recognised internationally as a natural herbal ingredient for specific applications and has undergone toxicity and dermal safety testing to better understand its interaction with the human body.

You may have seen recent media coverage regarding Tea Tree Oil and proposed regulatory changes in Europe. These concerns are based on studies involving unrealistic exposure conditions, such as animals being force‑fed very large quantities of undiluted oil, which does not reflect how Tea Tree Oil is used in practice. (abc.net.au)

Tea Tree Oil is not intended for ingestion, and you should always follow the instructions on the product label.

When used as directed, Tea Tree Oil is considered a safe and well‑tolerated ingredient with proven benefits across a wide range of applications, including Gelair products.

More information on the available research can be found in the Australian Government report The Effectiveness and Safety of Tea Tree Oil.

Moisture build-up caused by humidity and condensation creates the ideal conditions for bacteria and mould to grow - particularly in enclosed indoor environments such as air-conditioning systems, bathrooms and laundries.

These microorganisms can spread through the air, reducing air quality and contributing to issues such as unpleasant odours, respiratory irritation, allergies and asthma. In some cases, prolonged exposure may also impact overall health and immune function.

Controlling moisture and preventing microbial growth is key to maintaining a healthier indoor environment. Gelair products help control and reduce microorganisms including bacteria and mould, improving the quality of the air you breathe.

More detailed research on the health impacts of indoor air pollutants can be found in the World Health Organisation (WHO) report, WHO Guidelines for Indoor Air Quality: Dampness and Mold.

Following our first price review in more than 10 years, during which only a handful of clients had experienced a price adjustment, Gelair introduced a modest price increase on 1 August 2026.

This pricing will remain in place for two years from that date, providing you with stability and confidence when selling Gelair.

Over the preceding decade, we absorbed rising costs associated with raw materials, packaging, the ethical sourcing of high-quality Australian Tea Tree Oil, manufacturing, research, compliance, insurance and logistics. We did so without compromising on quality or customer service. This price adjustment ensures we can continue delivering scientifically engineered, effective and reliable solutions well into the future.

What hasn’t changed:

• The use of fresh, high-quality, 100% pure Australian Tea Tree Oil
• Our unique delivery system for sustained essential oil vapour release
• Up to 12 weeks of continuous protection*
• Simple installation with zero end-user energy costs
• Our commitment to performance, results, wellbeing and transparency

We will continue to invest in quality and innovation, delivering freshly manufactured products globally while supporting our stakeholders and creating healthier environments.

Gelair ABs are scientifically engineered for versatile, effective performance and are designed for ducted air-conditioning systems of all sizes, from single room systems to large air handlers. ABs can be used across all industries and indoor environments, from hospitals and entertainment venues to oil rigs, superyachts, ships, and homes.

Refer to the Air-conditioning Blocks product codes and size guide on the product page to select the correct size AB for your system.

Gelair products are scientifically engineered with a unique delivery system that ensures the sustained release of pure Australian Tea Tree Oil vapour, providing continuous microbiological, viral, and fungal control through the entire air-conditioning system and the room/s it services.

Gelair’s innovative technology is highly effective in high-volume, high-airflow environments such as AHUs. By treating all air entering and exiting the AHU, Gelair ABs sanitise the entire air-conditioning system, effectively stopping the spread of bacteria, airborne viruses and mould.

Wall-Mounted Split (High Wall)
This is the most common residential type - a sleek, rectangular unit mounted high on an interior wall that blows air out in one direction.

Ceiling Cassette
These sit in the ceiling, hiding most of the heat exchanger (evaporator) unit in the ceiling cavity, with a flat, modern faceplate sitting flush with the ceiling panels. They distribute conditioned air evenly outwards in either two, three or four directions.

Bulkhead System
A low-profile indoor unit designed to be completely hidden inside a ceiling bulkhead/cavity or above a wardrobe or bathroom, distributing air through a short, straight duct out of a discreet wall or ceiling grille. This is the typical design of modern hotel rooms.

Floor Console
A unit installed low on a wall or sometimes at floor level, resembling a traditional radiator or hydronic heater.

Multi-Split Systems
While not a type of indoor unit a multi-split system is a configuration where two or more indoor units (which can be a mix of wall-mounted, cassettes, or bulkheads) are connected to a single, larger outdoor compressor.

Visit Health-e SPLIT to see how many units your system requires.

Yes, you can use the All Purpose Cleaner, Coil and Duct Cleaner and Coil and Duct Cleaner Industrial Strength on porous surfaces but always spray these products onto a soft cloth first, and follow label instructions.

Direct application onto surfaces such as plastics, PVC, veneers, or wood, may damage, degrade, or discolour the surface.

For wood surfaces in particular, test on an inconspicuous area and wipe off immediately after application. Use a microfibre cloth for smaller areas and stain removal.

We sell a variety of Pressure Washer options. Available in both mains-powered and portable rechargeable models, our washers have fine or wide spray settings with pressures ranging from 125 psi to 200 psi – providing flexibility for a wide range of cleaning situations including coils and fins of air handling units.