®Every breath
that stands up to testing
Cal Inc. specialises in indoor air treatment. Through a closed loop of testing, treatment and re-testing, we deliver verifiable, traceable clean air to homes, commercial spaces and vehicle cabins.
Give a space
the scent of memory
Scent design and diffusion systems for commercial spaces — from blending the accord to placing the units and managing intensity, a scent programme tailored to each setting.
Good air
without opening a window
Eight categories of fresh air equipment, with main units and ductwork designed around your layout and airflow needs, delivered as one package with installation and ongoing maintenance.
HVAC engineering
we deliver projects, not products
From heating and cooling load calculations to standardised installation, commissioning and acceptance — a complete HVAC service tied to no particular brand.
Every glass of water
back to its original purity
Ten-stage fine filtration and reverse osmosis for direct drinking, installed in one visit from the kitchen tap to the whole-house water circuit.
13 years of on-site formaldehyde treatment
Cal Inc. starts from air testing data, combining scenario-based treatment plans with standardised site procedures to match each type of space with the right path — turning air quality from "feels better" into "meets the data".
- Treatment plans built on on-site test data — no package work without evidence
- Standardised procedures and controlled agent dosage, with every step traceable
- A re-test report on completion; the job counts as delivered only when the data passes
- Integrated capability across homes, offices, schools, healthcare, research, commercial spaces, vehicles and other special indoor environments
Inside our project sites
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Campus fresh air01
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Offices & commercial02
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Homes & villas03
Solutions
A full chain of services covering air treatment, fresh air, scenting, purification and water — delivered end to end from survey and design to installation and maintenance.
HVAC Engineering
Survey, design, equipment selection, installation and commissioning, matched to each space's load and use.
Fresh Air Systems
Survey, design, equipment, installation, commissioning, testing and maintenance — a continuous supply of clean fresh air.
Air Scenting
Survey, design, diffuser selection, installation, fragrance matching, maintenance and handover.
Air Purification
Purification work, plus purifiers, ionisers, humidifiers, dehumidifiers and disinfection units.
Water Purification
Central softeners, ultrafiltration units and household RO systems for every water need.
Health Library
Common questions, the standards behind them, and everyday precautions for indoor air and water.
Formaldehyde and TVOC: how long should you ventilate after renovation?
The release period depends on boards, adhesives, temperature and humidity — "three months of airing" alone is not reliable.
Read more →How to read the limits on an air quality test report
Different standards assume different scenarios and sampling conditions — knowing the limit tells you whether the data actually passes.
Read more →Windows, fresh air systems or purifiers: which one do you need?
The three approaches solve different problems — using the wrong one wastes money and results.
Read more →