ONA Blocks 170g – Long-Lasting Odour Neutraliser for Homes, Cars & Grow Rooms

The ONA Block 170g Odour Neutraliser is a compact, long-lasting odour control solution designed to help eliminate unwanted smells in smaller enclosed spaces. Featuring ONA's specialist odour-neutralising formula, these convenient solid blocks gradually release active ingredients into the surrounding air, helping tackle unpleasant odours rather than simply covering them with fragrance.

Ideal for use in homes, cars, cupboards, offices, workshops, garages and indoor gardening areas, ONA Blocks provide continuous background odour control without requiring electricity, batteries or complicated installation.

Each block contains 170g of ONA's solid odour-neutralising formula and is available in six fragrances: Apple Crumble, Fresh Linen, Fruit Fusion, Polar Crystal, PRO and Tropics.

Simply remove the lid or protective liner and position the block in an appropriate location. The formula gradually releases its odour-neutralising ingredients into the air, helping maintain a fresher-smelling environment.

With an approximate working life of up to 30 days, depending on airflow, temperature and exposure, ONA Blocks offer an affordable and convenient approach to everyday odour management.

Key Features & Benefits

• 170g solid odour neutraliser: Compact and convenient for smaller spaces.
• Long-lasting performance: Can remain effective for up to approximately 30 days, depending on environmental conditions.
• Neutralises unwanted odours: Designed to tackle odour-causing molecules rather than simply mask smells.
• Six fragrance options: Apple Crumble, Fresh Linen, Fruit Fusion, Polar Crystal, PRO and Tropics.
• Simple passive operation: Remove the lid or liner and allow the block to work naturally.
• No power required: Works without electricity or batteries when used as a standalone block.
• Adjustable exposure: Control the amount of exposed material to influence the release rate.
• Compact container: Easy to position in cupboards, storage areas, utility rooms and other suitable locations.
• Suitable for household and commercial use: Ideal for a variety of small-space odour control applications.
• Compatible with ONA accessories: Can be used with suitable ONA Block Dispensers and ONA Air Filters.
• Easy to replace: Simply exchange the used block when its odour-neutralising performance reduces.

How Do ONA Blocks Work?

ONA Blocks use a solid formulation containing essential oils and other odour-neutralising ingredients to help reduce unwanted smells in the surrounding air.

When the container is opened, the block's active ingredients are gradually released through exposure to the air. These ingredients help neutralise airborne odours, providing an alternative to conventional fragrance-only air fresheners.

Unlike a liquid spray that is applied when required, the solid block format provides continuous passive dispersion while exposed to the surrounding environment.

The release rate depends on factors such as temperature, air movement and the amount of block surface exposed.

Six ONA Block Fragrances Available

The ONA Block 170g range is available in six fragrances, allowing you to choose a scent to suit your surroundings.

ONA Block Apple Crumble 170g

Apple Crumble provides a sweet, warm fragrance inspired by baked apples and dessert notes. A popular choice for domestic spaces and general room freshening.

ONA Block Fresh Linen 170g

Fresh Linen offers a clean, laundry-inspired fragrance suited to bedrooms, offices, cupboards and utility rooms.

ONA Block Fruit Fusion 170g

Fruit Fusion features a fruity fragrance profile, offering a fresh alternative to more traditional clean-smelling odour neutralisers.

ONA Block Polar Crystal 170g

Polar Crystal provides a crisp, fresh fragrance character for users who prefer a cool, clean-smelling environment.

ONA Block PRO 170g

ONA PRO offers ONA's distinctive professional fragrance profile, making it a versatile option for general-purpose odour control.

ONA Block Tropics 170g

Tropics delivers a tropical-inspired fragrance for users who prefer a warmer, more exotic scent.

Please Note: All six fragrance variants contain 170g of ONA Block. Select your preferred fragrance from the available product options.

Ideal for Small Spaces & Enclosed Areas

The ONA Block 170g is particularly useful for smaller areas where a compact, passive odour neutraliser is more convenient than a larger gel container or powered dispenser.

Its small footprint makes it easy to position on a shelf, inside a suitable cupboard or in another secure location where unwanted odours are present.

Typical Applications

• Household odour neutralisation
• Cars and vehicle interiors
• Cupboards and storage spaces
• Utility rooms and laundry areas
• Pet-related odours in suitable locations
• Garages and workshops
• Offices and workspaces
• Lockers and changing areas
• Indoor gardening and hydroponic workspaces
• General background odour control

For persistent odours, identify and address the source wherever possible. ONA Blocks are designed to support odour management rather than replace cleaning or ventilation.

Approximate Coverage for Small Rooms

The ONA Block is designed for small-space odour neutralisation. As a general guide, coverage is approximately 10–20m² under suitable conditions, although the effective area will vary according to ventilation, temperature, odour intensity and placement.

In areas with stronger odours or increased air movement, the effective coverage and lifespan may be reduced.

Up to 30 Days of Odour Control

Each ONA Block 170g can last for up to approximately 30 days, depending on the conditions in which it is used.

Warmer environments and higher airflow may cause the block to release its active ingredients more quickly, reducing its working life.

Cooler conditions and more limited exposure may slow the release rate.

Please Note: The 30-day lifespan is an approximate guide, not a guaranteed duration.

Adjustable Fragrance & Odour Neutraliser Release

One of the advantages of the ONA Block is the ability to adjust how much of the solid material is exposed to the surrounding air.

For normal use, remove the lid and allow the block to disperse its ingredients naturally.

For a more controlled release, small openings can be made in the lid, reducing the exposed surface area.

For stronger distribution, the block can be removed from its container or a small amount can be grated into a suitable dish, following the manufacturer's instructions.

Important: Increasing the exposed surface area may increase the rate at which the block is consumed.

Compatible with ONA Block Dispensers

The ONA Block 170g can also be used with the ONA Block Dispenser, a compact fan-assisted device designed to increase the distribution of the block's odour-neutralising ingredients.

Simply remove the block from its packaging, position it inside the compatible dispenser and operate the fan according to the manufacturer's instructions.

This can be particularly useful where natural air movement is limited or greater distribution is required.

Looking for a compatible dispenser? View our ONA Block Dispenser.

Compatible with ONA Air Filters

ONA Blocks can also be used with compatible ONA Air Filters, which are designed to incorporate ONA's odour-neutralising technology into suitable ventilation systems.

These accessories provide an alternative way to distribute ONA's active ingredients in applications where an appropriately configured air extraction system is available.

Browse compatible accessories: Explore our ONA Air Filters.

Please Note: The ONA Block Dispenser and ONA Air Filters are sold separately.

ONA Blocks for Grow Rooms & Indoor Gardens

ONA Blocks can be used for general odour management around indoor gardening areas, grow rooms and hydroponic workspaces.

The compact block format makes them convenient for adjoining rooms, storage spaces and other appropriate areas where unwanted smells may be present.

For larger growing environments, an appropriately sized activated carbon filter and adequate ventilation should remain the primary methods of odour management.

Important: Avoid placing fragranced odour-neutralising products directly beside sensitive flowers, harvested botanical materials or exposed produce where fragrance transfer may be undesirable.

How to Use ONA Blocks 170g

1. Select your fragrance: Choose Apple Crumble, Fresh Linen, Fruit Fusion, Polar Crystal, PRO or Tropics.
2. Choose a suitable location: Position the block on a stable surface in the area where unwanted odours are present.
3. Open the container: Remove the lid and any protective liner to expose the block to the surrounding air.
4. Adjust exposure if required: Reduce or increase the exposed surface area according to the manufacturer's directions.
5. Allow natural dispersion: The odour-neutralising ingredients will gradually release into the air.
6. Monitor performance: Check the block periodically and replace it when its effectiveness diminishes.
7. Use a compatible dispenser if required: For fan-assisted distribution, install the block in a suitable ONA Block Dispenser.
8. Store unused product correctly: Keep unopened or unused blocks sealed in a suitable cool location.

ONA Block 170g Technical Specifications

Brand	ONA
Product	ONA Block Odour Neutraliser
Product Type	Solid Odour-Neutralising Block
Net Weight	170g
Available Fragrances	Apple Crumble, Fresh Linen, Fruit Fusion, Polar Crystal, PRO, Tropics
Key Ingredients	Water, Propylene Glycol, Sodium Stearate, Essential Oils
Application	Passive Evaporation / Fan-Assisted Distribution
Approximate Working Life	Up to 30 Days, Depending on Conditions
Approximate Coverage	10–20m², Depending on Conditions
Maximum Recommended Temperature	Below 40°C
Power Required	No – Standalone Use
Compatible Accessories	ONA Block Dispenser, Compatible ONA Air Filters
Primary Function	Airborne Odour Neutralisation
Typical Applications	Homes, Vehicles, Offices, Storage Areas and Horticultural Workspaces

What's Included?

• 1 × ONA Block 170g in Your Selected Fragrance

Please Note: ONA Block Dispensers, ONA Air Filters and other accessories are not included.

Safety & Storage Information

• Use only as directed by the manufacturer.
• Keep out of reach of children.
• Avoid direct contact with eyes and unnecessary contact with skin.
• Do not ingest the block.
• Contains terpenes and terpenoids, which may cause allergic reactions in sensitive individuals.
• The block may cause eye and skin irritation.
• Keep away from temperatures exceeding 40°C, as the block may melt.
• Position securely to prevent spills or accidental contact.
• Avoid direct contact with plants, flowers, food and exposed produce.
• Store in a cool, suitable location when not in use.
• Refer to the product label and safety data sheet for complete safety instructions.

Why Choose ONA Blocks 170g?

The ONA Block 170g provides a compact, straightforward and long-lasting solution for everyday odour management.

Its solid formulation gradually releases odour-neutralising ingredients into the surrounding air, making it ideal for smaller enclosed spaces where a large gel container or powered system may not be necessary.

With six fragrance options, up to 30 days of working life and compatibility with ONA's dedicated dispensing accessories, the ONA Block is a practical choice for homes, workplaces, vehicles and indoor gardening environments.

ONA Blocks 170g – Convenient, Long-Lasting Odour Control

Keep smaller spaces fresher with ONA Blocks 170g. Available in Apple Crumble, Fresh Linen, Fruit Fusion, Polar Crystal, PRO and Tropics, these compact odour neutralisers provide convenient passive odour control without requiring electricity or batteries.

Simply open the container, position the block in a suitable location and allow ONA's specialist formula to help tackle unwanted airborne smells.