In 60 minutes, know exactly what your people are breathing
Measure What You Can't See
Your workplace looks clean. The air tells a different story: fine particles, rising CO₂ and chemical vapours that your people breathe all day without knowing. Invisible does not mean harmless.
For S$88, our 60-minute IAQ Health Check measures it on site using the uHoo Aura, a RESET Air Accredited Grade B monitor and SGBC-certified Green Building Product, and explains what the numbers mean before we leave. Trusted by preschools, clinics and offices across Singapore.
1-Hour On-Site Assessment
Real-time readings of CO₂, PM₂.₅, TVOCs, temperature and humidity, etc
On-site interpretation and actionable guidance
60-minute on-site assessment by a Green Mark Associate
Live readings across 13 core parameters, plus 7 risk indices
Findings explained on site, in plain English
As Featured In
Jay Choy interviewed on Exploring the Science of Clean Air
What Is Indoor Air Quality (IAQ) Testing?
Indoor Air Quality (IAQ) testing measures the health and comfort of the air you breathe indoors.
It helps identify invisible pollutants such as fine particles, volatile organic compounds (VOCs), and carbon dioxide levels that can affect productivity, concentration, and wellbeing.
At FJ SafeSpace, every assessment follows our SAFE-AIR Protocol™: Survey, Analyse, Fix, Evaluate, a structured process designed to identify air risks, correct them, and verify results.
Our assessments use the uHoo Aura, a Singapore Green Building Product (SGBP) certified under the SGBC scheme and RESET Air Accredited Grade B monitor.
The uHoo Aura reads 13 core indoor environmental parameters, including CO₂, particulate matter, TVOCs, formaldehyde, carbon monoxide, temperature and relative humidity, plus two more from the add-on module fitted to our unit. It converts those readings into 7 plain-English risk indices.
Every indicator we measure
| We measure | What it tells you |
|---|---|
| Carbon dioxide (CO₂) | The clearest sign of weak ventilation. High CO₂ means drowsy, foggy rooms. |
| PM2.5 | Fine particles that reach deep into the lungs. |
| PM10 | Coarser dust from haze, traffic and renovation. |
| PM4 | Mid-sized indoor dust. |
| PM1 | Ultrafine particles from cooking and combustion. |
| TVOCs | Vapours from paint, glue, cleaning products and new furniture. |
| Formaldehyde | A common irritant from plywood, laminates and furnishings. |
| Carbon monoxide | Colourless, odourless, dangerous even in small amounts. |
| Temperature | Thermal comfort you can feel, measured precisely. |
| Humidity | Too high breeds mould. Too low dries out eyes and throats. |
| Air pressure | Helps us read how air moves through your space. |
| Light | Poor light strains eyes and dulls alertness. |
| Noise | Sustained noise wears people down across a working day. |
| Ammonia (NH₃)add-on | A sharp irritant from cleaning agents, waste areas and some industrial processes. |
| Ozone (O₃)add-on | Irritates the airways. Can come from printers, copiers and some air devices. |
Ammonia and ozone come from an optional sensor module fitted to our unit. Light and noise are indoor environmental quality measures rather than air quality measures.
Risk scores you can act on
The uHoo Aura does not only measure. It turns those readings into plain-English scores, so instead of interpreting raw numbers you can see at a glance whether your space needs attention.
RESET Air Index
A single percentage score combining PM2.5, CO₂ and TVOC, calculated using the published RESET Air Index method. Unlike an AQI, which reflects only the worst pollutant, it reflects all three together.
Mould Index
Assesses the conditions that allow mould to grow, so you can act before it takes hold.
Virus Index
Indicates how current air conditions affect the survival and spread of airborne viruses.
Influenza Index
Flags when temperature, humidity and ventilation may support flu transmission.
Norovirus Index
Assesses conditions linked to norovirus persistence. Useful in elder care and healthcare settings.
Pollen Index
Estimates how indoor conditions influence pollen persistence and allergy risk.
Vape Index
Indicates when air conditions are consistent with vaping activity. Useful for schools and offices.
How to read your RESET Air Index
The index runs from 0 to 100%, where 100% is best. RESET publishes these recommended bands.
| Band | Score | Meaning |
|---|---|---|
| Green | 90% and above | Best performing |
| Yellow | 80 to 89% | Acceptable |
| Orange | 65 to 79% | Needs attention |
| Red | 50 to 64% | Poor |
| Purple | 49% and below | Worst performing |
Source: RESET Standard, RESET Air Index.
Why Conduct an IAQ Test for Your Business?
Protect Health: Detect pollutants and allergens early.
Enhance Productivity: Better air means better focus.
The evidence on CO₂ is strong. In a controlled study of office workers published in Environmental Health Perspectives, cognitive function scores were 15% lower at around 945 ppm of CO₂, and 50% lower at around 1,400 ppm, compared with around 550 ppm. A closed meeting room with several people in it reaches 1,400 ppm without difficulty.
Source: Allen et al., Environmental Health Perspectives, 2016. doi.org/10.1289/ehp.1510037
Benchmark Your Air: Understand your readings against recognised indoor air quality guidelines.
Reduce Costs: Optimise ventilation and HVAC efficiency.
Strengthen Reputation: Visible commitment to healthy spaces.
Why Choose FJ SafeSpace?
The instrument we use
The uHoo Aura is a RESET Air Accredited Grade B monitor and a Singapore Green Building Product certified under the SGBC scheme. It is the same class of instrument used for green building work, not a consumer gadget, and it is read on site by a Green Mark Associate certified by the Singapore Green Building Council.
If the findings call for action
Where readings show a genuine problem, we can discuss what comes next: longer monitoring, ventilation improvements, or air and surface disinfection powered by Photoplasma™ technology. We measure first, then fix.
Proven track record
Since February 2023 we have completed more than 300 indoor air quality assessments across Singapore, in preschools, clinics, offices, F&B outlets and industrial facilities.
Our founder Jay Choy is a Green Mark Associate certified by the Singapore Green Building Council, and holds an Executive Certificate in Corporate and Environmental Sustainability from NTU.
In Exploring the Science of Clean Air on CNA938, Jay spoke with presenter Melanie Oliveiro about indoor air quality in Singapore.
Our uHoo sensors are trusted by:
How We Assess Your Indoor Air Quality
Every indoor air quality (IAQ) assessment by FJ SafeSpace follows our SAFE-AIR Protocol™:
Survey, Analyse, Fix, Evaluate.
A structured 60-minute process that measures your indoor air quality, explains what the readings mean, and identifies whether anything needs closer investigation. Used across preschools, clinics, offices and industrial facilities in Singapore.
Your S$88 IAQ Health Check covers the first two stages, Survey and Analyse. Fix and Evaluate follow only if the findings call for them, and are quoted separately. Measure before you fix. Evaluate after you fix.
Step 1. Book Your IAQ Assessment
Choose a date and time that suits your operations. Book online, or reach us by WhatsApp or email. Your 60-minute indoor air quality assessment covers one selected area.
Step 2. Survey Your Space
On arrival we walk the area with you and note what shapes your air: occupancy levels, ventilation, air-conditioning and possible pollutant sources such as printers, cleaning products or new furnishings.
Step 3. Monitor for 60 Minutes
We place the uHoo Aura™, a RESET Air accredited monitor, at a representative location. It captures indoor air quality data continuously, including CO₂, particulate matter, TVOCs, formaldehyde, temperature and relative humidity.
Step 4. Analyse the Findings
We examine your readings, the patterns across the hour, and any unusual conditions, referencing recognised indoor air quality guidelines where applicable.
Step 5. Explain What We Found
Before we leave, we talk you through the important observations in plain English: what your readings mean for the people using the space, and whether anything warrants a closer look.
Choose Your Package
MOST BOOKED
S$88: IAQ Health Check
A 60-minute on-site indoor air quality assessment of one selected area, with your readings explained on site in plain English.
S$220: IAQ Health Check + Detailed Report
The same 60-minute assessment, plus a written report documenting and benchmarking your readings against recognised indoor air quality guidelines, with tailored observations and recommendations. Delivered within 2 to 3 working days.
Need something more extensive?
Some spaces call for longer monitoring or coverage across multiple areas. We scope the work to your requirement and quote accordingly. Tell us about your space
If the findings call for action
Where readings show a genuine problem, we can discuss what comes next: longer monitoring, ventilation improvements, or air and surface disinfection powered by Photoplasma™ technology. We measure first, then fix.
Your IAQ Health Check is a screening assessment, not an SS 554 compliance audit or laboratory test.
Common questions
Indoor air quality testing in Singapore, answered.
How much does an indoor air quality test cost in Singapore?
An FJ SafeSpace IAQ Health Check is S$88 for a 60-minute on-site assessment of one selected area. A version including a written report is S$220. Longer monitoring or multiple areas is quoted per job.
How long does an IAQ assessment take?
60 minutes on site for the standard assessment, covering one selected area. We measure the space as it normally operates, because occupancy, ventilation and activity are exactly what shape the readings. An empty room tells you very little about the air your people actually breathe.
What does the assessment measure?
13 core parameters including carbon dioxide, PM1, PM2.5, PM4, PM10, TVOCs, formaldehyde, carbon monoxide, temperature, humidity, air pressure, light and noise, plus ammonia and ozone from an add-on module fitted to our unit. These are converted into 7 risk indices, including the RESET Air Index.
Is this an SS 554 compliance audit?
No. The IAQ Health Check is a screening assessment, not an SS 554 compliance audit or a laboratory test. SS 554 and frameworks such as Green Mark, WELL and RESET have their own sampling, equipment, placement and duration requirements. We benchmark your readings against recognised guidelines so you understand them in context, and we will tell you if what you actually need is a formal audit.
Do I get a written report?
With the S$220 package, yes, delivered within 2 to 3 working days. The S$88 assessment includes a full on-site explanation of your readings but no written document.
What happens if you find a problem?
We tell you what we found and what it means. Any remediation, whether longer monitoring, ventilation changes or air and surface disinfection, is discussed and quoted separately. We measure before we fix, so you are never paying for a solution before anyone has established there is a problem.
Who is the IAQ Health Check for?
Preschools, clinics, offices, F&B outlets and industrial facilities across Singapore. It suits anyone responsible for a space where people spend hours at a time, particularly after a renovation, a move, or a run of complaints about stuffiness, odours or headaches.
Our credentials
Featured on CNA938 Exploring Science. Clients include Mapletree Investments, Meinhardt Singapore and Evonik (SEA).
Client Testimonials
See What Our Satisfied Clients Have to Say
What the written report looks like
The S$220 package includes a documented report, delivered within 2 to 3 working days. It sets out every reading taken, how each one compares with recognised IAQ guidelines, what the patterns point to, and what we would do about anything that needs attention. Client reports are confidential, so we share an anonymised sample on request.
- Every parameter measured, with the readings in full
- How each reading compares with recognised IAQ guidelines
- Your seven risk indices, including the RESET Air Index
- What the patterns suggest about ventilation and sources
- Anything unusual, flagged and explained in plain English
- What we would do next, and whether anything is needed at all
Take the First Step Toward Healthier Air
The IAQ Health Check by FJ SafeSpace helps you create cleaner, more comfortable spaces for people to breathe, work and thrive.
Using SGBC SGBP and RESET Air certified technology, we turn invisible risks into visible improvements.
Every Breath You Take, We’ve Got You Covered.
Every Breath You Take, We've Got You Covered.
At FJ SafeSpace, we measure indoor environmental quality, explain what the readings mean, and fix what needs fixing. Our SAFE-AIR Protocol™ runs Survey, Analyse, Fix, Evaluate on every job. Measure before you fix. Evaluate after you fix. We use the uHoo Aura, a RESET Air Accredited Grade B monitor and Singapore Green Building Product certified sensor, measuring 15 parameters plus seven computed risk indices, alongside patented Photoplasma™ air and surface disinfection by Biozone Scientific.
More than 300 assessments completed across Singapore since 2023.
Get Your Clean Air Today
+65 9738 0302
hello@fjsafespace.com
6 Aljunied Ave 3 #03-05
Guthrie Engineering Building
Singapore 389932
FJ SafeSpace 2026