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Sinoair - Odor Removal Solutions

Eradicate Unpleasant Odors Discover the Power of True Odor Elimination

Plant-based, Biodegradable, Made in Germany

Meet Sinoair®️

the ultimate odor neutralizer

Welcome to Sinoair by et-projekt, where we understand that the presence of unwanted odors goes beyond a mere nuisance—it can impact well-being and in extreme cases, pose serious health risks. With over a decade of experience serving the Hong Kong Drainage Services Department, Sinoair is not just an odor removal brand; it’s a promise of purity and safety.

Unpleasant Odors Banished:

Efficiently and Effectively

Tailored solutions for complex challenges


There are countless scenarios where bad smells arise—from industrial processes to public spaces—and they’re not only disruptive but potentially hazardous. Concentrations of compounds like butyric acid or hydrogen sulfide can be dangerous, emphasizing the need for expert intervention.

While three main culprits (butyric acid, hydrogen sulfide, and ammonia) are often responsible for negative smells, addressing these issues is far from simple. It requires thorough investigation into causes, analysis of emissions, consideration of materials involved as well as spatial dynamics including air volume and flow conditions. There are no one-size-fits-all solutions; each odor challenge is unique.


A few facts about Sinoair®️

Reduction of ammonia (NH3)
Reduction of Ethylamine/Butylamine
Reduction of Diaminobutane
Reduction of Hydrogen Sulfide (H2S)
Reduction of Butyric Acid
Reduction of Formaldehyde
Reduction of Mercaptans

Use Cases

Drainage Services Department, Hong Kong

minimum 90% hydrogen sulfide removal

For over 10 years, et-projekt have been supplying Sinoair®️ SEV, designed to remove at least 90% of hydrogen sulfide (H2S) in sewage treatment plants located all over Hong Kong.

Why is removing H2S important?

  • Health & Safety: H2S is a toxic gas that can pose serious health risks to employees, including respiratory problems, eye irritation, and even death at high concentrations.
  • Productivity: Exposure to lower levels of H2S can cause headaches, fatigue, poor concentration, and other symptoms that reduce worker productivity.
  • Equipment Longevity: H2S can be corrosive to metals and other materials used in industrial equipment, potentially leading to costly repairs or replacements if not properly managed.
  • Odor Control: Aside from its toxicity, H2S has a foul odor even at low concentrations; removing it helps maintain a more pleasant work environment.

Theme Park Foam Party

sinoair®️ + ocean scent

The theme park is hosting a foam party during the summer season. The event is expected to draw a large crowd, leading to potential odor issues in the changing rooms and party area due to sweat, heat, and other organic waste.

Challenge: An odor-free environment while maintaining the thematic element. 

Solution: We deployed Sinoair®️ + subtle ocean scent with our commercial diffusion systems. This approach will not only eliminate unpleasant odors but also complement the foam party’s beach-like atmosphere. 


  • A refreshing ocean aroma enhances guests’ thematic experience while effectively managing odors.
  • Improved overall satisfaction by maintaining clean-smelling facilities despite challenging conditions.
  • Positive feedback likely increases repeat visits for similar events in the future.

Neutralization of Odor in Meat Preparation Room of a 5-Star Hotel

Sinoair + delivery system

A five-star hotel’s meat preparation room is experiencing persistent unpleasant odors that are affecting the working environment and potentially compromising the dining experience of guests.

Challenge: The head chef has expressed dissatisfaction with the smell and requires an effective solution to neutralize it without introducing any overpowering scents that could interfere with food preparation and quality.

Solution: Implementing Sinoair’s odor neutralization technology specifically designed for commercial kitchens and food preparation areas. This system will target and eliminate the organic odors commonly found in meat prep rooms without leaving any residual fragrance.


  • Creation of a more pleasant work atmosphere for chefs and kitchen staff.
  • Assurance that no disruptive smells reach guest areas, preserving high standards of dining experience.
  • Compliance with hygiene standards expected from a five-star establishment by addressing odor at its source.

Neutralization of Carpark Exhausts in a Multi-Level Indoor Carpark

sinoair®️ + delivery System

A multi-level indoor carpark is experiencing high levels of exhaust fumes, which can be harmful to health and create an unpleasant environment for users.

The challenge is to effectively neutralize the exhaust odors without disrupting carpark operations or using methods that could potentially damage vehicles or harm individuals.

Implementing a ventilation system combined with air purifying technology designed to handle high volumes of traffic and filter out vehicle emissions. This solution should also include carbon filters or similar technologies that can absorb and neutralize the pollutants commonly found in car exhaust.

  • Improved air quality within the carpark for both users’ health and comfort.
  • Compliance with environmental standards regarding indoor air pollution.
  • Enhanced reputation of facility management by prioritizing user safety and comfort.

Enhancing Customer Experience in High Traffic Restroom of a Shopping Mall with Scent Marketing


A shopping mall is looking to improve the customer experience in its high traffic restrooms by addressing odor issues without providing additional cleaning staff or materials.

The solution focuses on implementing scent marketing and odor neutralization techniques to maintain a pleasant atmosphere within the restrooms. This approach can help create an inviting environment for customers, despite not increasing cleaning frequencies or supplies.


  • Improved perception of cleanliness and hygiene due to effective odor management.
  • Enhanced overall shopping experience leading to increased customer satisfaction.
  • Positive association with the mall’s brand through a carefully crafted scent profile.

Why Choose Sinoair®️?

As experts in odor neutralization for over 20 years, Sinoair®️ has been tested by industrial users, from sewage treatment plant, livestock, biogas, landfills, high-traffic restrooms, and so much more!

no smell


Sinoair®️’s advanced technology accelerates the natural breakdown of odors, making it up to 400 times faster than the typical decomposition process in nature.

Eco Friendly

Eco Friendly

Embracing our planet’s well-being, Sinoair®️ is crafted from 100% plant-based ingredients that are as kind to the earth as they are effective against odors.



With evidence backed by scientific research and testing, you can trust in the effectiveness of Sinoair®️ to deliver on its promises of odor elimination.

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