For water-cooled chillers and cooling towers.
Non-invasive install, zero downtime.
*Results vary with actual scaling conditions.
the challenge
Centralized water-cooled chillers are often the largest energy consumer in a building. Scale forms inside the condenser tubes, piping and cooling tower infill, insulating the heat-exchange surfaces — so the chiller has to run at a higher load to hit the same set-point temperature.
SWATS applies an electro-magnetic field (EMF), tuned by pulse frequency, to the water as it flows — converting dissolved hardness minerals into a soluble form instead of hard scale, and gradually dissolving scale that has already formed.
Scale forms on tube and
infill surface
Heat transfer drops,
chillers run at higher load
Cooling towers
efficiency drops
More blowdown water to keep a lower Cycle of Concentration
the solutions
Optimizing your centralized HVAC cooling towers – chillers system with SWATS EMF, installed with no change to your existing plant.
how it works
SWATS applies an electromagnetic field — swept from 900 Hz to 21,000 Hz — on the pipe wall.
It changes how calcium carbonate behaves in the water, in three stages:
see it in action
Better heat exchange helps your cooling system reach its set-point temperature with less work.
What it delivers
Chiller energy
electricity savings from the chiller operation
Water conservation
reduction in cooling tower blowdown water volume
Assets Protection
Doubling
Up
of cooling tower infill lifespan
Assets Protection
Significant
reduction of the
bio-corrosion risk
*Results vary according to existing water quality, system age and operating conditions. Figures based on field deployment data and manufacturer specifications.
Case Studies & implementation
Under Non-Disclosure Agreement (NDA)
The Problem
Continuous, high thermal loads make any loss of chiller efficiency costly — both in operating expense and in sustainability performance. The plant’s net-zero and Singapore MEES compliance targets left no room for the efficiency decay that comes from untreated scale building up in the condenser loop.
9.5%
Chillers Efficiency improvement in 6 months
ROI <2 Years
Investment: Returns
× 2 times
Doubled-up the cooling tower infills usage lifespan
Verified against client BMS data over a nine-month monitoring period
Supports the plant’s net-zero and Singapore MEES compliance targets
Under Non-Disclosure Agreement (NDA)
The Problem
Twenty years of operation had left this chiller system losing efficiency to scale build-up in the condenser loop — the kind of gradual decay that’s easy to overlook until it shows up on the electricity bill. With net-zero and Singapore MEES compliance targets in place, the plant needed proof that scale-driven losses on legacy infrastructure could be reversed, not just slowed.
10.2%
Chillers Efficiency improvement in 8 months
ROI <2 Years
Investment: Returns
× 2 times
Doubled-up the cooling tower infills usage lifespan
Verified against client BMS data over a nine-month monitoring period
Supports the plant’s net-zero and Singapore MEES compliance targets
WHY CHOOSE SWATS
Electromagnetic water conditioning technology developed in the USA.
Compatible with existing cooling towers and chillers — no system replacement required.
Up to 12% chiller electricity savings by removing scale from the heat-exchange surfaces.
Steel enclosure rated IP65 — protected indoors and out, for years of reliable operation.
QUESTIONS, ANSWERED
SWATS replaces only the anti-scalant program in your cooling tower – chiller condenser system. For a fully chemical-free system that also replaces biocide dosing with copper-silver ionization and adds a live water-quality dashboard, see SWATS+.
SWATS applies a tuned electromagnetic field to your condenser water, preventing new scale from forming and gradually dissolving existing scale on pipes, tubes and cooling tower infill.
Lower chiller electricity consumption, a longer cooling tower infill lifespan, less frequent tower cleaning, and reduced spend on anti-scalant chemicals — typically paying back within 2–3 years.
Lower energy use reduces your carbon footprint, less anti-scalant chemical use means less chemical discharge in blowdown water, and a longer infill lifespan means less plastic waste from tower replacements.
HVAC is typically a building’s largest energy consumer, so improving chiller efficiency contributes meaningfully to carbon-reduction and net-zero commitments, and can support compliance with Minimum Energy Efficiency Standards (MEES) where they apply.
No. SWATS is installed in-line with no change to your existing chiller or cooling tower operation, and takes over from your anti-scalant program immediately upon commissioning with zero downtime.
Scale prevention starts immediately on commissioning. Existing scale removal is gradual — our case studies show measurable energy savings within 3–6 months, depending on how much scale had already built up.
SWATS is low-maintenance by design. We support equipment functional checks on a yearly basis.
SWATS equipment comes with a 3-year warranty on parts and components.
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Hannve Technology Pte Ltd is a sustainable and advanced technology solution provider dedicated to accelerating business impact through high-quality, reliable solutions that meet our customers’ unique needs and help them achieve their ESG objectives.
© 2026 HANNVETECH
Quick Links
Hannve Technology Pte Ltd is a sustainable and advanced technology solution provider committed to accelerating business impact by providing high-quality and reliable solutions that meet the unique needs of our customers and help them achieve their business objectives in ESG.
© 2023 HANNVETECH
