Single Blog

Thailand MEPS Standards What Cooling Tower Operators Need to Know

If you operate a cooling tower in Thailand, you need to understand the TISI 2134-2565 standard. This regulation, which establishes Minimum Energy Performance Standards (MEPS) for industrial air conditioners and related cooling equipment, has significant implications for cooling tower operations[reference:5]. I have been helping facilities in the Eastern Economic Corridor get ahead of these requirements, and the most common question I hear is: "What does this mean for my cooling tower fill?" The short answer is that Tower Fill upgrades are one of the most cost-effective ways to achieve compliance while reducing operating costs. Let me break down everything you need to know.

What the TISI 2134-2565 Standard Actually Requires

The standard mandates MEPS for industrial cooling equipment. For new permits, your cooling system must meet higher energy efficiency benchmarks[reference:6]. This applies to both new facilities and major retrofits. If you are applying for any new industrial permit in Thailand, your cooling towers will be scrutinized.

But here is what many plant managers do not realize: the standard is not just about the chiller or the cooling tower as a standalone unit. It considers the entire cooling system efficiency. That means if your cooling tower fill is old and fouled, causing your chiller to work harder, you might fail the MEPS test even if your chiller itself is new and efficient.

The Thailand Clean Air Act also came into effect in 2026, adding another layer of compliance[reference:7]. This act focuses on air quality and emissions, including drift from cooling towers. If your tower is producing visible mist plumes, you could face fines. This is where high-efficiency Drift Eliminator becomes not just a good idea but a regulatory requirement.

How Cooling Tower Fill Affects Your MEPS Compliance

The cooling tower fill is the heart of your tower's heat transfer capability. Old, fouled, or degraded fill reduces heat transfer efficiency, which means your chiller has to work harder to reject the same amount of heat. That increases your system's overall energy consumption, which directly impacts your MEPS score.

I recently assessed a food processing plant in Chonburi that was applying for an expansion permit. Their cooling tower fill was seven years old, and approach temperature had risen from design 3.5°C to 5.8°C. The energy consultant flagged the cooling tower as a non-compliance risk. We replaced the fill with new Film Fill Cooling Tower media and added new Water Collector sections. Approach temperature dropped to 3.2°C, and the plant passed its MEPS assessment. The fill paid for itself in energy savings within 10 months.

Regional Market Context: Southeast Asia Cooling Market Growth

The Southeast Asia cooling market is the fastest-growing of its kind in the world. Analysts project the market value will reach $25.41 billion by late 2026, driven by a CAGR of 6.9**[reference:8]. Thailand is a major part of that growth, with new industrial parks and data centers coming online across the country.

This growth means more competition for energy and water resources. The Thai government is using MEPS standards to manage that demand. Facilities that invest in efficient cooling now will have a competitive advantage over those that wait until the last minute.

Water Efficiency Is Part of the Equation Too

While MEPS focuses on energy, the Thailand Clean Air Act and local water regulations are also tightening. Water scarcity is a real issue in parts of Thailand, especially in the Eastern Economic Corridor during dry season. Cooling towers are significant water users, and regulators are paying attention.

Upgrading your Demister and drift eliminators is one of the fastest ways to reduce water consumption. I have seen facilities cut makeup water requirements by 25-35** just by replacing old eliminators with modern high-efficiency units. That is water savings that directly improve your facility's sustainability metrics.

Also, consider your Air Inlet Louvers. Proper louvers prevent debris from entering the tower, which reduces fouling and extends fill life. In Thailand's agricultural areas, rice husk and other plant debris can be a major problem. Good louvers with fine mesh screens are essential.

Case Study: Automotive Plant in Rayong

An automotive assembly plant in Rayong was facing a MEPS compliance deadline for a new production line. Their existing cooling towers had 6-year-old fill that was heavily scaled from hard water. We performed a complete fill replacement over a two-week shutdown, using high-efficiency film fill with 19mm flutes. We also installed new Air Intake Screens to prevent future debris ingress.

The results: approach temperature improved from 5.5°C to 2.8°C. The plant passed its MEPS assessment with room to spare. Annual energy savings were estimated at ฿1.2 million (about $35,000 USD), with an additional ฿400,000 in water savings from reduced drift. The total project cost was ฿1.5 million, giving a payback period of just over one year.

What You Should Do Right Now

If you are a plant manager in Thailand, here is my advice:

• Measure your current approach temperature. Compare it to your tower's design specification. If you do not have the design spec, a good rule of thumb is 3-4°C for a well-maintained tower.
• Inspect your fill. Look for scaling, warping, or biological growth. Use a borescope if you cannot see directly.
• Check your drift eliminators. If you see visible mist from the fan stack, your eliminators are not working properly.
• Review your maintenance records. When was the last time you replaced or cleaned your fill? If it has been more than four years, start planning for replacement.
• Consult with a MEPS compliance expert. The regulations are complex, and a good consultant can help you identify the most cost-effective path to compliance.

Do not wait until you are applying for a permit to discover your cooling tower is non-compliant. By then, you will be in a rush, paying premium prices for emergency work. Proactive maintenance and upgrades are always cheaper.

Long-Term Strategy for Thailand Operations

Looking ahead, I expect Thai MEPS standards to become more stringent over time. The trend globally is toward tighter energy efficiency regulations, and Thailand is following that path. My recommendation is to build a five-year cooling tower maintenance and upgrade plan that includes scheduled fill replacement every 3-4 years.

Also, consider investing in monitoring technology. IoT sensors that track approach temperature, fan power, and water flow can alert you to performance degradation before it becomes a compliance issue. Some of the facilities I work with in Thailand are now using real-time monitoring to optimize their cooling tower operation, and the results are impressive – typically 5-10** additional energy savings beyond what you get from good maintenance alone.

We have extensive experience helping Thai facilities meet MEPS requirements with cost-effective cooling tower fill upgrades. Contact us for a free compliance assessment.