TENMARS TM-380 for HVAC and Ventilation Performance Checking Malaysia
TENMARS TM-380 for HVAC and Ventilation Performance Checking Malaysia
A comfortable indoor temperature does not always mean that a building has good indoor air quality.
In air-conditioned offices, commercial buildings, schools and other enclosed spaces, technicians may need to investigate several environmental factors at the same time.
The TENMARS TM-380 Multi IAQ Monitor measures CO₂, PM2.5, PM10, temperature and relative humidity, making it a useful portable instrument for HVAC and ventilation-related indoor air quality checks in Malaysia.
Why HVAC Troubleshooting Needs More Than Temperature
When occupants complain that a room feels uncomfortable, the first response is often to check the air-conditioning temperature.
However, the actual issue may involve:
Ventilation
High occupancy
Particulate pollution
Outdoor air infiltration
Filtration
Humidity
Uneven environmental conditions
Checking temperature alone may therefore provide only part of the picture.
A multi-parameter IAQ meter allows technicians to collect additional information before deciding what needs further investigation.
CO₂ as a Useful Ventilation Indicator
People continuously generate carbon dioxide through respiration.
In occupied indoor spaces, CO₂ levels can increase when ventilation is insufficient relative to occupancy.
The TENMARS TM-380 uses an NDIR sensor for CO₂ measurement.
This makes it useful for checking different occupied spaces such as:
Offices
Meeting rooms
Conference rooms
Training rooms
Classrooms
Retail spaces
Commercial buildings
CO₂ measurement does not diagnose every HVAC problem by itself, but it provides valuable information when investigating ventilation conditions.
Example: Meeting Room Ventilation Check
Consider an enclosed meeting room.
Before the meeting begins, the technician records the CO₂ level.
Ten people then enter the room.
Measurements are taken again after:
15 minutes
30 minutes
60 minutes
If CO₂ rises substantially while the room is occupied, the facility team has useful measurement data for further ventilation investigation.
After occupants leave or ventilation is increased, readings can be observed again.
This is more informative than simply asking whether the room feels stuffy.
Air-Conditioning and Ventilation Are Not the Same Thing
This distinction is important.
Air-conditioning can make a room cool.
But cooling does not automatically mean that enough outdoor air is being introduced into the occupied space.
A room can therefore feel comfortable while CO₂ continues to increase.
For HVAC troubleshooting, measuring temperature together with CO₂ can help technicians distinguish between thermal comfort and ventilation-related conditions.
PM2.5 Monitoring for HVAC Investigation
Ventilation introduces or exchanges air, but outdoor air can also contain particulate pollution.
This becomes particularly relevant during:
Malaysia haze periods
Nearby construction
Heavy traffic
Industrial activities
Dusty outdoor conditions
The TENMARS TM-380 measures PM2.5 using a laser particulate matter sensor.
Technicians can compare particulate readings at different points in a building to investigate how particles may be entering or moving through indoor spaces.
PM10 Measurement
The TM-380 also measures PM10.
This provides another useful particulate parameter when investigating environments affected by larger airborne particles or dust.
Potential sources include:
Construction work
Renovation
Cleaning activities
Road dust
Building entrances
Outdoor dust infiltration
Measuring both PM2.5 and PM10 gives technicians more information than using a CO₂ meter alone.
Check Before and After HVAC Adjustments
One useful application is comparing environmental measurements before and after a change is made.
For example:
Before Adjustment
Record:
CO₂
PM2.5
PM10
Temperature
Relative humidity
Make the HVAC or Ventilation Adjustment
This could involve changes to ventilation operation, filtration or other building-system settings according to the appropriate technical procedure.
After Adjustment
Take another set of measurements.
The comparison can help determine whether environmental conditions changed after the intervention.
Compare Different Zones
Indoor environmental conditions may vary significantly throughout the same building.
A technician could compare:
Outdoor Area → Building Entrance → Lobby → Open Office → Meeting Room → Return-Air Area
Portable measurements make this type of investigation easier.
Instead of relying on a single permanently installed sensor, the TM-380 can be moved to the area where troubleshooting is required.
Investigating Filtration Performance
Particulate measurements can also support basic filtration investigations.
For example, PM2.5 and PM10 readings may be compared:
Before filtration / air cleaning
and
After filtration / air cleaning
Technicians can also compare readings in different building zones.
If particulate levels remain unexpectedly high, further investigation may be required into:
Filter condition
Filter selection
Air leakage
Open doors
Outdoor air intake
Indoor particulate sources
The IAQ monitor provides measurement data; the HVAC professional then determines the appropriate technical response.
Air Purifier Performance Checking
Portable air purifiers are increasingly used in offices, schools and other indoor environments.
Instead of depending entirely on the purifier's own display, technicians can use an independent instrument to compare particulate conditions.
For example:
PM2.5 before purifier operation
versus
PM2.5 after purifier operation
Measurements can also be taken at various distances from the purifier.
This can help determine whether particulate reduction is occurring throughout the occupied area or mainly near the unit.
Temperature Measurement
Temperature remains an important HVAC parameter.
The TM-380 allows temperature to be viewed together with other IAQ measurements.
For example, a room may show:
Comfortable temperature + increasing CO₂
This suggests that cooling performance and ventilation conditions should not automatically be treated as the same issue.
Relative Humidity Measurement
Relative humidity provides another useful environmental parameter.
By measuring humidity together with temperature, CO₂ and particulate matter, technicians can collect a broader set of environmental data during an inspection.
This is especially useful when occupants report general discomfort without knowing the exact cause.
Manual and Automatic Recording
A major challenge with HVAC troubleshooting is that building conditions change throughout the day.
Occupancy may increase and decrease.
HVAC systems may operate according to schedules.
Doors may open frequently during certain periods.
Outdoor pollution may also change.
The TENMARS TM-380 supports manual and automatic recording, allowing users to observe environmental conditions over time rather than relying only on one instantaneous reading.
Example: Office IAQ Investigation
Suppose employees report that a conference room becomes uncomfortable during afternoon meetings.
A technician could monitor:
CO₂ before occupancy
CO₂ during the meeting
PM2.5 and PM10
Temperature
Relative humidity
Conditions after occupants leave
The collected measurements can then support further investigation of ventilation, filtration or HVAC operation.
Suitable HVAC Applications
The TENMARS TM-380 can be useful for:
HVAC troubleshooting
Ventilation assessment
Office IAQ inspection
Meeting room checks
Classroom ventilation checks
Commercial building maintenance
Facility management
Air purifier evaluation
Particulate monitoring
Haze-related indoor monitoring
Before-and-after environmental comparisons
Who Can Use the TENMARS TM-380?
Potential professional users include:
HVAC contractors
Facility managers
Building maintenance teams
M&E contractors
Safety personnel
Environmental consultants
IAQ service providers
Property management companies
School facility teams
Industrial maintenance departments
One Portable Meter, Multiple Measurements
Instead of carrying separate instruments for several basic IAQ parameters, technicians can measure:
CO₂ + PM2.5 + PM10 + Temperature + Relative Humidity
with the TENMARS TM-380.
This is particularly convenient for troubleshooting work where measurements need to be taken in several rooms or building zones.
TENMARS TM-380 for HVAC Professionals in Malaysia
For HVAC contractors and facility teams in Malaysia, indoor air quality investigations increasingly involve more than temperature.
Ventilation, occupancy, particulate pollution, filtration and environmental conditions can all influence what is happening inside a building.
The TENMARS TM-380 provides a practical portable measurement tool for collecting several important IAQ parameters during HVAC and ventilation investigations.
Contact MTM Precision
MTM Precision Sdn. Bhd.
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia
🌐 Website: www.mtmpre.com.my
📧 Email: mtmpre@yahoo.com
📱 WhatsApp: +6016-660 7346
Contact MTM Precision for TENMARS TM-380 Multi IAQ Monitor enquiries in Malaysia.
13 Aug 2026
