Indoor air quality compliance monitoring, with the evidence to show it
Indoor air quality compliance monitoring measures air in occupied spaces against the standards a building follows. Aqueduct tracks CO2, PM2.5, VOC and other contaminants by zone, overlays occupancy, measures exposure in zone-hours, recommends or makes ventilation changes where control is enabled with owner approval, and keeps the record. Your team or consultant certifies compliance.
Hold air in range through occupied hours, and keep the record to show it.
Continuous air data for every occupied space
- Core parameters
CO2, PM2.5, PM10, VOC, temperature and humidity are reported continuously for every monitored zone in the building.
- Specialized gases
CO, NO2, ozone, formaldehyde and radon where the space or the standard calls for them.
- Occupancy overlay
Readings are aligned with occupancy, so breaches in empty rooms do not drown the real ones.
Exposure measured in zone-hours, not just peaks
- Zone-hours
Time above target is tracked per zone, because sustained levels matter more than spikes.
- Standards referenced
Each finding names the threshold, the standard behind the rating and a plain explanation of why.
- Recommendation
Plain-language advice, such as raising outdoor-air supply while outdoor air is mild.
Ventilation changed where needed, and the record kept
- Control where enabled
Dampers and fans adjust where control is enabled, with owner approval, and every change is logged in command history.
- Ticket otherwise
Where control is not enabled, the recommendation routes into your CMMS as a ticket with the zone and the trace.
- Evidence on file
Every event, its duration and its resolution stay available to your team or consultant.
Indoor air quality, before and after Aqueduct
- An annual test stands in for a year of air.
- Levels are checked, duration is ignored.
- Empty-room spikes and full-room breaches look the same.
- Ventilation is maxed out everywhere to be safe.
- Evidence is a folder of one-off reports.
The Aqueduct way- Air is measured continuously in every zone.
- Exposure is tracked in zone-hours, not just peaks.
- Occupancy separates real breaches from noise.
- Ventilation rises only where and when it is needed.
- Evidence is a continuous, exportable record.
Why air quality is hard to evidence
Air changes by the minute, and most buildings measure it once a year.
Spot checks, not records
An annual test captures one moment, often when the building is quiet, not when it is full.
Level without duration
A reading above a threshold matters far more if it lasts, but few systems track how long.
Air without occupancy
A CO2 rise in an empty room is noise; the same rise in a full room is a problem.
Fixes that cost energy
Ventilation is turned up everywhere to be safe, and energy climbs with it.
How Aqueduct supports IAQ compliance
One air quality breach, from sensor to record.
Air sensors in each zone report CO2, PM2.5, PM10, VOC, temperature and humidity, with occupancy alongside.
Readings are tracked against the targets for each space type, with exposure measured in zone-hours.
CO2 stays high in an occupied meeting floor. The recommendation points to the AHU fresh-air damper, noting outdoor air is mild.
Ventilation is increased where control is enabled with owner approval, or a ticket routes to your CMMS.
CO2 returns to range, the event is recorded with its duration, and the evidence is available to your team or consultant.
What it needs on site
Existing sensors connect if they emit telemetry. New devices are installed through partners.
| Device | What it measures or does | Why it matters |
|---|---|---|
| IAQ sensors per zone | CO2, PM2.5, PM10, VOC, temperature, humidity | The measured record by space |
| Specialized gas sensors (where needed) | CO, NO2, O3, formaldehyde, radon | Covers garages, labs and specific risks |
| Occupancy sensors or schedules | Whether a zone is in use | Separates occupied breaches from empty rooms |
| Outdoor air sensor or weather data | Outdoor temperature and air quality | Shows when more fresh air is cheap or unwise |
| BMS points or field device controller (optional) | Damper and fan control | Ventilation changes where control is enabled |
Air quality is a duration problem, so measure it every hour people are inside.
Talk to our teamStandards your evidence can reference
Aqueduct supplies measured data and records. Your team or consultant assesses and certifies against the standard.
Who cares about this
The seats that ask for this first.
Where teams put it to work
Classrooms with a ventilation record
Classroom CO2 is tracked through the school day with occupancy, giving school districts a continuous record of classroom ventilation.
Learn more
Wards and theaters held to target
Wards, theaters and isolation rooms are measured against their targets, with ventilation adjusted where enabled and verified back in range.
Learn more
Healthy building commitments, measured
Office floors track CO2, particulates and VOC with occupancy, supporting the healthy building claims that tenants increasingly ask about.
Learn moreDifferent spaces, different air problems
One CO2 threshold does not fit every room. Here is what matters in the spaces where air quality is questioned most.
Meeting rooms and open floors
CO2 builds fastest in small, full meeting rooms. Open floors usually breach only at peak occupancy, often after ventilation was cut to save energy.
- CO2 against occupancy by zone
- Exposure in zone-hours
- Demand controlled ventilation where enabled
- Measured
- CO2, temperature, humidity, PIR
- Reference
- ASHRAE 62.1, WELL, RESET Air
- Aqueduct
- breaches only when people are present
Classrooms
Classrooms are dense and occupied in fixed blocks. Sustained CO2 within a lesson matters more than a short spike.
- Duration above threshold per occupied hour
- Recommendation with the standard named
- Outdoor conditions considered before adding air
- Measured
- CO2 per room
- Reference
- BB101 for schools
- Aqueduct
- per-lesson exposure record
Clinical spaces
Operating rooms and isolation rooms are held to temperature, humidity and pressure bands, not only CO2. The record has to cover every minute the room is in use.
- Temperature, RH and differential pressure
- Limits configured per room class
- aQ Assurance keeps deviations with closure
- Measured
- temperature, RH, pressure
- Reference
- ASHRAE 170, your accreditor
- Aqueduct
- continuous record per room
Warehouses and production
Particulates and combustion gases follow production and vehicle activity. A weekend measurement says little about a working shift.
- PM2.5, PM10, CO and NO2 where needed
- Readings aligned with shifts
- Vent control tied to air quality where enabled
- Measured
- particulates and gases
- Reference
- local workplace air rules
- Aqueduct
- the record during production
Halls, lounges and concourses
Crowds arrive in waves. Ventilation sized for the peak wastes energy for the rest of the day, and ventilation sized for average fails at the peak.
- CO2 per zone during events
- Comfort reported per event
- Ventilation staged ahead of arrival where enabled
- Measured
- CO2, temperature, humidity
- Reference
- the venue's comfort targets
- Aqueduct
- event-by-event evidence
Clinical air has tight bands
ASHRAE 170 design temperature range for operating rooms
Source: ASHRAE Journal: Conditioning for the environment of critical care hospital operating roomsASHRAE 170 design relative humidity range for operating rooms
Source: ASHRAE Journal: Conditioning for the environment of critical care hospital operating roomsrequired pressure of an operating room relative to adjacent spaces
Source: ASHRAE Journal: Conditioning for the environment of critical care hospital operating roomsThe difference between a reading and evidence
An assessor or auditor asks what the space did over time. These are the fields a continuous record holds.
| Field | Why it matters | Where it comes from |
|---|---|---|
| Zone and space type | Limits differ by space | Zones in aQ Core |
| Occupancy state | Breaches matter when people are present | PIR sensors or schedules |
| Duration above target | Sustained levels matter more than spikes | Zone-hours in aQ AirSafe |
| Standard referenced | Shows which threshold was applied | The finding itself |
| Outdoor conditions | Explains whether more fresh air was sensible | Outdoor sensor or weather data |
| Action taken | Ventilation change or ticket | Command history or CMMS |
| Time to resolve | Shows the response, not only the event | Event record |
Sources1 references cited on this page
sites in 21 countries run on Aqueduct.
and 9 clinics in one of India’s top hospital chains.
US airport running water intelligence on Aqueduct.
of commercial real estate under Aqueduct.
FMCG manufacturing campus.
operations run on Aqueduct.
Related
Common questions
It is continuous measurement of air in occupied spaces against the standards a building follows, such as ASHRAE 62.1 or WELL. Aqueduct measures CO2, particulates and VOC by zone, tracks exposure duration and keeps the record your team or consultant uses to assess compliance.
No. Aqueduct supplies measured evidence, recommendations and records. Compliance is assessed and certified by your team or your consultant.
Because duration matters as much as level. A brief spike is less concerning than a moderate level sustained through occupied hours, so Aqueduct tracks how long each zone stays above target.
CO2, PM2.5, PM10, VOC, temperature, humidity and pressure as standard, plus CO, NO2, O3, SO2, formaldehyde, ammonia, hydrogen sulfide, radon and vaping detection with specialized sensors.
Where control is enabled with owner approval, yes, through BMS points or a field device network controller. Otherwise a ticket with the recommendation routes into your CMMS.
It overlays air quality with occupancy and outdoor conditions, so ventilation increases only in occupied zones that need it, and the recommendation notes when outdoor air makes fresh-air supply low-cost.
One per zone that a sensor can speak for, which depends on room size and layout. Meeting rooms, classrooms and dense open areas usually need their own sensor.
Yes, with differential pressure, temperature and humidity sensors per room. Limits are configured per room class, and aQ Assurance keeps deviations and their closure for your team or accreditor.
Exposure is what matters for people. A spike in an empty room is usually noise, while the same level sustained in a full room is a real problem.
Aqueduct exports the continuous record by zone and period. Your team or consultant uses it in the assessment; Aqueduct does not certify the building.
See Aqueduct on your own facility.
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