Why Hotels Are Replacing Their Entire Chemical Cabinet With One Safe, Sustainable Cleaner – Tersano SAO

Learn why and how Tersano Stabilized Aqueous Ozone (SAO) is transforming hotel and resort housekeeping across Singapore and Southeast Asia — and why your chemical program may already be obsolete.

The average hotel housekeeping storeroom contains 15 to 30 different chemical cleaning products. Each one needs its own training protocol, storage requirements, hazard label, and disposal procedure. What if you could replace most of them with a single solution rated completely safe — MSDS 0-0-0-0 — made entirely from tap water?

That is not a hypothetical. It is what Tersano Stabilized Aqueous Ozone (SAO) does, every day, in over 8,000 organisations worldwide — from five-star hotels and international airport terminals to hospitals, commercial buildings, and resort properties across Southeast Asia.

ProMedUSA has been Singapore’s authorized Tersano dealer for eight years. In that time, we have helped hotels, resorts, hospitals and facilities management companies across Singapore and the region dismantle chemical cleaning programmes that no longer needed to exist.

​This post explains exactly how — and why general managers, executive housekeepers, and facilities managers are making the switch and not looking back.

The Problem Nobody Talks About: What Is Actually In That Storeroom

Walk into any hotel housekeeping storeroom and you will find something that looks like the photograph above — a wall of dispensing cartridges, rows of multi-litre chemical drums in every colour, laminated warning charts, and stacks of spray bottles filled with a different chemical for every surface. Behind that visual complexity sits a chain of real operational costs that most general managers have simply accepted as unavoidable.

• Staff safety exposure. Housekeepers handle chemical disinfectants, bathroom cleaners, glass cleaners, carpet deodorizers and degreaser products daily. Over years, that exposure accumulates. Respiratory sensitisation, skin irritation, and chemical-related health claims are more common in hospitality than most operators acknowledge.
• Chemical residue and re-soiling. Most detergents leave a surfactant film on hard and soft surfaces. On carpets, that film acts as a particle trap — attracting dirt and causing high-traffic lanes to look dingy within days of cleaning.
• Indoor air quality. VOCs from spray cleaners, bathroom sanitizers and carpet products get trapped in fibres and fabrics, contributing to poor guest IAQ — the very thing hotels spend on HVAC purification to solve.
• Procurement and compliance overhead. Managing 15 to 30 chemical SKUs means ongoing procurement cycles, dilution ratio training, storage compliance, spill containment, disposal protocols, and MSDS documentation for every product in use.
• Sustainability reporting. With ESG now a board-level priority across the hospitality sector, chemical cleaning programmes are increasingly hard to defend in sustainability disclosures. Guests notice. So do auditors.

What Is Tersano SAO — and How Does It Work?

Tersano SAO — Stabilized Aqueous Ozone — is created by infusing ordinary cold tap water with ozone using a proprietary, patented electrolytic process. The Lotus Pro V9 is wall-mounted in your housekeeping area and plumbed to a cold water line. Staff fill their spray bottles directly from it.

No mixing. No measuring. No PPE. No hazard labels. No chemical drums to store or dispose of. The result is a powerful, broad-spectrum cleaning and sanitizing solution that is:

• More effective than bleach on most pathogens
• Completely free of added chemistry
• Safe enough to splash on your face
• MSDS rated 0-0-0-0 — the safest possible classification (same as tap water)
• Self-neutralising — reverts to plain water after use
• Active as a disinfectant for up to 24 hours and as a cleaner for up to 6 days after dispensing

So Safe, You Can Wash Your Face With It

We do not ask our clients to take our word for the safety of Tersano SAO. We demonstrate it. The photograph above was taken during a client site visit — I filled a bottle directly from the Lotus Pro unit and washed my face with it to show the housekeeping team exactly what MSDS 0-0-0-0 means in practice.

“If I would not put it on my own face, I would not ask your team to spray it around guests, staff, or food preparation areas. With Tersano SAO, I can — and do — demonstrate that every time.”

— James Lim, ProMedUSA Pte Ltd

Compare that to the warning labels, glove requirements, and ventilation instructions on virtually every conventional cleaning product in your current storeroom. The contrast is stark — and telling.

Proven Results: The Numbers Do Not Lie

The before-and-after ATP test shown above was conducted using a Kikkoman Lumitester Smart bioluminescence meter — the industry standard for surface hygiene measurement. The result: a reduction from 3,394 RLU to 158 RLU — more than 95% — with a single wipe using a cloth dampened with Tersano SAO. No chemical disinfectant. No rinsing. No residue left behind.

The Chemical-Free Carpet Revolution

Soft surfaces are where traditional chemical programmes fail most visibly — and where Tersano SAO delivers some of its most dramatic results.

One Product Replaces Most of What Is In Your Storeroom

Certified by the World’s Most Trusted Bodies

Tersano SAO is one of the most independently certified cleaning systems in the world. If your hotel operates under LEED, BOMA BEST, Green Seal, or any ESG sustainability reporting standard, Tersano SAO actively supports and evidences your certification claims:

• Green Seal Certified  |  LEED (USGBC) Eligible  |  NSF Certified  |  TUV SUD Certified
• HACCP International Certified  |  BOMA BEST Compatible  |  EcoVadis Silver 2023
• US EPA Recognised  |  USDA Approved  |  FDA Recognised  |  Kosher Certified
• Etimad Halal Certified  |  GECA Certified (Australia)  |  Green Clean Institute Certified

The Real Cost of Doing Nothing

Every 1 litre jug, every 5-litre drum of bathroom disinfectant, every dilution cartridge, every spray bottle of glass cleaner — all of it ends up in the waste stream. With growing regulatory pressure on chemical waste disposal and single-use plastic packaging across Southeast Asia, this is an exposure that forward-thinking hotels are already working to reduce.

Tersano SAO generates zero chemical waste and zero packaging waste. The only consumable is the SAO cartridge. When SAO has done its job, it simply returns to being water. Nothing enters the drain that was not already there.

75% of travellers globally now say they prefer to stay at eco-friendly, sustainable hotels. Your housekeeping chemistry programme is either supporting or undermining that preference — every single day.

Simple Enough for Any Housekeeping Team to Use Immediately

Switching cleaning systems sounds like re-training an entire team, updating SOPs, and managing a complex transition. In practice, Tersano SAO dramatically reduces training complexity:

• No dilution ratios to memorise. Staff fill their bottle from the Lotus Pro and use it. Nothing to mix.
• No colour-coded chemical systems. One solution works across all surfaces. One bottle on the cart.
• No PPE protocols. No gloves to remember, no ventilation requirements, no do-not-mix warnings.
• No storage compliance complexity. A wall-mounted unit and a tap is all the storage SAO requires.
• No chemical mixing accident risk. The single most serious housekeeping safety incident category is eliminated entirely.

Your housekeeping team will be confident and competent with Tersano SAO within a single training session. We handle that session as part of every installation — and we are available for ongoing support because we have been doing this for eight years.

Singapore’s Most Experienced Authorized Tersano Dealer — 8 Years of Experience

ProMedUSA Pte Ltd has been the most experienced authorized Tersano dealer in Singapore since 2018.

We have supplied and commissioned Tersano SAO systems in hotels, hospitals, commercial buildings, schools, food and beverage operations, and facilities management companies across Singapore and Southeast Asia.

We do not just sell the unit. We conduct demonstrations, manage installation, train your team, and provide ongoing support for the life of the system.

​When you work with us, you work with people who know Tersano SAO thoroughly — because we have been living with it, and showing it to clients, for nearly a decade.

Frequently Asked Questions

Q. What is Tersano SAO and how does it work?

Tersano SAO (Stabilized Aqueous Ozone) is produced by the Lotus Pro V9, which passes cold tap water through a patented electrolytic cell, infusing it with ozone. The resulting solution is a powerful cleaner, sanitizer, deodorizer and VOC eliminator with no added chemistry. After use, it simply reverts to plain water.

Q. Is Tersano SAO safe for hotel staff and guests?

Yes — completely. Tersano SAO carries an MSDS rating of 0-0-0-0, the safest possible classification. No PPE, gloves, eye protection, ventilation requirements, or hazard signage needed. Safe around guests, safe around food contact surfaces, and safe on skin.

Q. What cleaning chemicals can Tersano SAO replace?

Tersano SAO replaces most daily-use hotel cleaning products including glass cleaners, surface sanitizers, bathroom disinfectants, carpet cleaners and deodorizers, stainless steel cleaners, food contact surface sanitizers, fabric refreshers, and general-purpose multi-surface cleaners.

Q. Does SAO work on carpets and soft furnishings?

YES! And, very effectively. Because SAO contains no surfactants, it leaves no sticky residue in carpet fibres — the primary cause of rapid re-soiling with conventional carpet shampoos. Carpets dry faster, resist re-soiling, and retain their appearance longer.

Q. What certifications does Tersano hold?

Green Seal, LEED (USGBC), NSF, TUV SUD, HACCP International, BOMA BEST, EcoVadis Silver 2023, US EPA, USDA, FDA, Kosher, Etimad Halal, and GECA Australia. One of the most comprehensively certified cleaning systems available anywhere in the world.

Q. Where can I get Tersano SAO in Singapore?

ProMedUSA Pte Ltd is Singapore’s most experienced authorized Tersano dealer with eight years of experience. We supply, install and support Tersano SAO systems across Singapore and Southeast Asia.

Q. How and Where to use Tersano?

Ready to See What SAO Can Do for Your Property?

We offer on-site demonstrations at your property. Bring us your most challenging surface, your dirtiest carpet, your most odour-affected room. We will show you exactly what Tersano SAO does and let the results speak for themselves.

Eight years. Thousands of litres of SAO deployed across Singapore and Southeast Asia.

​Zero regrets from any client who made the switch.

ProMedUSA Pte Ltd / 111 North Bridge Road, #08-27 Peninsula Plaza, Singapore 179098  |  Tel: (65) 6836-9665  |  WhatsApp: +65 9456 8313  |  sales@promedusa.us