Cooling Tower Water Treatment for WELL & LEED Buildings

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Cooling Tower Water Treatment for WELL & LEED Certified Buildings

Pursuing WELL or LEED certification? Your cooling tower is one of the systems assessors look at closely. It is a major water user and a known breeding ground for Legionella.

Elgressy EST (Electrolysis Scale Treatment) controls scale, corrosion and biofouling without chemical dosing, helping your building meet the health targets of WELL and the water-saving targets of LEED.

Supports WELL W03Supports LEED water creditsNon-chemicalRetrofit-ready
Request a free water analysis Call +66 64 284 6598

Why cooling towers matter for certified buildings

Health risk

Warm, recirculating water and aerosol drift make cooling towers a common source of Legionella.

Water use

Evaporation and blowdown make the cooling tower one of the largest water consumers in a commercial building.

Chemical load

Conventional treatment adds biocides, scale and corrosion inhibitors to the water and to the discharge.

Efficiency loss

Scale insulates condenser tubes and raises chiller energy use.

WELL Building Standard

EST supports your WELL Legionella management plan (W03)

Under WELL v2, Legionella control is a precondition: no building is certified without it. Feature W03, Basic Water Management, requires a Legionella management plan that covers cooling towers, hot water systems and any other place where water is recirculated and turned into aerosol. Where the building operates its own cooling towers, the plan must also include a Legionella sampling schedule.

WELL does not prescribe a specific treatment method. It asks you to show results. That is where EST fits.

  • Continuous control, 24/7: EST treats the water all the time, with no dosing gaps or empty chemical drums.
  • Clean surfaces: By controlling scale and biofilm, EST removes the deposits where Legionella shelters and multiplies.
  • Fewer chemicals in the building: Less handling and storage of hazardous biocides by your maintenance team.
  • Documentation ready: ALA provides a commissioning handover report and operator training, giving your WELL plan clear records of how the cooling tower is treated and maintained.

EST forms the treatment backbone of your plan. Routine monitoring and Legionella sampling, as required by WELL, remain part of good practice.

LEED

EST helps you earn LEED cooling tower water points

LEED rewards buildings that run their cooling towers at higher cycles of concentration. Cycles measure how many times water is reused before it is bled off. More cycles means less blowdown, less make-up water and a lower water bill.

In LEED v5, the Enhanced Water Efficiency credit includes options to limit and optimize cooling tower water use, worth up to 2 points for new construction and up to 3 points for core and shell. Earlier versions (LEED v4 / v4.1) award points under the Cooling Tower Water Use credit.

The limit on cycles is usually scale: minerals such as calcium and silica build up as water evaporates. EST controls scale continuously, so the tower can safely run at higher cycles without chemical overdosing.

What LEED looks forHow EST helps
Higher cycles of concentrationContinuous scale control allows higher cycles safely
Lower make-up water and blowdownLess bleed-off means less fresh water bought
Equipment that can operate at the chosen cyclesEST protects against corrosion (guaranteed max. 2 mpy)
Efficient cooling plantClean condenser tubes keep chiller energy use low

Exact points depend on your make-up water analysis and LEED version. ALA can supply the water analysis and cycles calculation for your LEED consultant.

Why ALA and Elgressy

Proven technology

Elgressy, founded in 1987, has thousands of EST systems installed worldwide.

Independently reviewed

The Elgressy EST-N systems were examined and approved by the IFC (International Finance Corporation).

Local partner

ALA has been the exclusive Elgressy distributor in Southeast Asia since 2010.

Full handover

Every project includes a commissioning handover report plus theoretical and practical operator training.

How we work with your certification team

  1. Site survey & water analysis

    We test your make-up and circulating water.

  2. Proposal & cycles calculation

    We size the EST system and estimate water, chemical and energy savings.

  3. Installation & commissioning

    Delivered with a full handover report.

  4. Training & support

    Your operators and your WELL/LEED consultant receive the documentation they need.

Frequently asked questions

Is EST “WELL certified” or “LEED certified”?

No product can be. WELL and LEED certify buildings, not equipment. EST supports the cooling tower parts of both standards.

Does EST replace Legionella testing?

No. WELL requires a management plan and, for cooling towers, a sampling schedule. EST keeps the system clean so test results stay in control.

Can EST be retrofitted to an existing building?

Yes. EST installs on existing cooling towers, and WELL v2 is open to existing buildings as well as new ones.

How many cycles can my tower reach with EST?

It depends on your water quality. We calculate it from your water analysis.

Planning a WELL or LEED project? Talk to us before your design is fixed.

Request a free water analysis and cycles calculation.

Contact ALA

English: 064 284 6598  |  ภาษาไทย: 063 957 8383  |  Email: mk.ala@hotmail.com

Please contact us right away for a free demonstration

+66639578383
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