Designed to your load, not to a catalogue.
Four plants, 5,000 RT, engineered to the building's real consumption profile and this climate. Control logic written in-house rather than bought as a vendor package.
Delivered ×4
Energy Service Company · Kuala Lumpur
The most sustainable energy is the one your building never draws.
Every tonne of carbon a building avoids by using less energy is cheaper than every tonne it removes any other way. We find the waste under a government grant, engineer it out with no capital outlay from you, and settle the result on metered data against a baseline frozen before we started. To June 2026: 23 million kilowatt-hours and roughly 17,000 tonnes of CO2, converted at Malaysia's published grid factor.
What we do
Find it, fix it, prove it.
01 / Find it
The energy audit is funded.
The government pays for it and we apply on your behalf. Registered ESCO, Energy Auditor and Energy Manager in-house, which are the three things EECA 2024 obliges you to appoint.
02 / Fix itWe engineer the waste out.
Chiller plant redesigned to your real load, control logic written by us, heat recovered rather than thrown away. Funded by us or by an investor, never by you.
03 / Prove itThen we meter it, monthly.
Measured to IPMVP against a baseline frozen before works began, reported every month, carbon converted at the published national factor. Six years unbroken on our oldest plant.
Measured portfolio
What the work has actually changed.
A simple public view of the scale, energy savings and cooling capacity behind Susten's work. The detailed measurement basis and site records sit on the Results and Credentials pages.
45-59%
less energy per ton of cooling, on delivered retrofits
23.1mkWh
saved across four plants
17,199t
CO2 avoided across the portfolio
Metered against baselines fixed before works began, in the manner of IPMVP Option C, to 30 June 2026, including plants since divested. Carbon at the Energy Commission's published Grid Emission Factor for Peninsular Malaysia, matched to each year's savings.
Want to see the measurement basis and sustained plant results?
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Why now
Three things changed. They all point the same way.
The government pays for the audit. The law requires the work. The tariff punishes not doing it.
The audit is funded
SEDA pays for it
Susten applies on your behalf for the Energy Audit Conditional Grant, which funds the audit itself. Eligibility requires appointing an ESCO registered with the Energy Commission, which is what we are. First-come, first-served.
The work is mandatory
EECA 2024 is in force
Since January 2025, regulated buildings must appoint a Registered Energy Manager, implement an energy management system, and complete an audit through a Registered Energy Auditor. We already hold all three capabilities in-house.
The tariff bites
RP4 charges you for peak
The restructured tariff added a capacity charge billed on recorded peak demand, plus a monthly fuel adjustment that moves. Chillers usually drive your peak, so efficiency now cuts consumption, demand and volatility at once.
Want the policy, tariff and funding detail behind the timing?
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What we fix
Cooling is where the waste is. It is not where it ends.
A building wastes energy as heat: moved inefficiently, or thrown away when it was worth keeping. We own the whole stack that handles it, from the machine through the control logic to the meters that prove what changed.
Heat worth catching before it leaves.
A heat pump's efficiency is set by the lift. From the condenser water return it is about 25 K. From the chilled water return it is about 45 K. Take the heat already on its way to the cooling towers and you make hot water at high COP and lower the temperature the chillers work against. One intervention, two savings.
In tenderThousands of sensors, one platform.
Every component metered and fed to our own cloud energy management system, where equipment drifting outside normal parameters is flagged for inspection before it becomes a fault.
In service
Need the technical method, project stages or commercial models?
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Recognition
Recognised in both categories, twice.
National Energy Awards2023 · 2026
Category 2, Energy-Efficient Building (Retrofitted Building)
Special Award, Energy Performance Contracting
Recognised in both categories in both years, on two different buildings: a Kuala Lumpur office tower in 2023, and a Penang mall and office tower in 2026. The EPC category assesses the contract rather than the building: how the work was funded, guaranteed and settled.
2025Steward Leadership 25One of 25 projects across Asia-Pacific · curated by the Steward Leadership Institute, established by Temasek, with INSEAD, WTW and The Straits Times
2025MAESCO Gold x2Energy Efficiency · Innovation in Sustainability
2025SME100 AwardsFast Moving Companies, Malaysia · independently audited
ESCO · REA · REM · ISO 9001:2015 · Malaysia Digital · MyHIJAU · MAESCO · BEM · MBOT
Under EECA 2024 your audit must be performed by a Registered Energy Auditor and you must appoint a Registered Energy Manager. We hold both. Our ESCO registration is what makes your building eligible for a funded audit.
Want the recognition, registrations and evidence behind the work?
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The first step costs you nothing
Find out what your plant is actually drawing.
Audit funding
No upfront capex models
Susten can apply to SEDA on your behalf under the Energy Audit Conditional Grant. The grant is conditional on implementing qualifying efficiency measures; the full terms are explained on the eligibility page.
Would rather just ask a person? Email hello@susten.my.
You are likely eligible if
- Your building runs a chiller plant
- You use roughly 100,000 kWh or more per month
- You are a commercial or industrial building owner
- You have not yet appointed an ESCO for the audit
Grants are first-come, first-served. Not sure whether you have been notified under EECA? Ask us. The Energy Commission's list is not public.
Questions
The short version.
A few answers to help you decide whether to go deeper. The full FAQ covers technical, grant, compliance and commercial questions.
What does Susten actually do?
We audit, redesign, fund, rebuild and operate commercial chiller plants in Malaysia, then verify savings against a fixed baseline.
Do I need upfront capex?
Usually no. EPC and Cooling-as-a-Service models can be structured so the building owner does not fund the equipment upfront.
How much can cooling energy fall?
Our commissioned plants typically cut cooling energy by 40% or more, depending on baseline, load profile, operating hours and plant condition.
Need the detailed technical, grant, compliance or commercial answers?
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