Industrial Chillers: Overrated or Essential for Production?

A chiller can be a smart choice for one building and an unnecessary expense for another. I have seen many buyers focus on cooling capacity alone, then face high energy bills, complex maintenance, or equipment that runs far below its useful load.

The better question is not, “Are chillers worth it?”

The better question is, “Does my building need a central water-based cooling system?”

A chiller removes heat from water or another fluid. Pumps move the cooled fluid through air-handling units, fan coil units, or process equipment. The system then sends warm fluid back to the chiller for another cooling cycle.

This setup can support large buildings and industrial processes, though it may not suit every site.

When a chiller is a practical choice

I usually see a strong case for chillers in buildings with steady cooling demand, large floor areas, or strict temperature control needs.

Common applications include:

• Hotels with many guest rooms
• Hospitals and medical facilities
• Shopping centers
• Office towers
• Universities and large schools
• Manufacturing plants
• Food and beverage processing areas
• Data rooms and other spaces with continuous heat loads

A chiller can serve many zones from one central system. This may make temperature control easier than installing a large number of separate packaged units.

Industrial users may also choose chillers because their process needs stable fluid temperature. A molding machine, laser cutter, printing line, or food production system may need cooling that remains steady during long operating periods.

In these cases, the chiller is not just an air-conditioning product. It becomes part of the production system.

When a chiller may be more than you need

A chiller may not fit a small office, retail store, workshop, or low-occupancy building.

If the cooling load is modest and changes often, several split systems or packaged rooftop units may offer a simpler setup. These systems can work well when each room needs separate control and the building does not need central water circulation.

A chiller can create extra work through:

• Water pumps
• Cooling towers or dry coolers
• Water treatment
• Pipe insulation
• Control systems
• Regular cleaning
• Professional service requirements

The equipment also needs space. Air-cooled models need enough airflow around the condenser. Water-cooled models need a cooling tower, condenser water pumps, and suitable plant-room planning.

A low-load building may pay for capacity that it rarely uses. This can lead to poor operating efficiency and longer payback.

The size of the building is not the only factor

Many buyers use floor area as the main guide. I do not recommend relying on floor area alone.

Two buildings with the same size can have very different cooling needs. A glass office with strong afternoon sun may require more cooling than a shaded warehouse. A crowded restaurant may produce more internal heat than a quiet office of the same size.

I review these factors before comparing equipment:

1. Building location and outdoor design temperature
2. Window area and solar exposure
3. Occupancy levels
4. Lighting and equipment heat
5. Operating hours
6. Fresh-air requirements
7. Process cooling needs
8. Future expansion plans
9. Available electrical capacity
10. Local service support

A proper load calculation gives a more useful answer than a simple rule based on square meters.

Air-cooled or water-cooled?

Air-cooled chillers reject heat directly into outdoor air. They usually need less supporting equipment and are easier to install in many small and medium projects.

Their design may suit sites where water use is restricted or where a cooling tower cannot be installed. The trade-off can include higher noise, larger outdoor units, and reduced performance during very hot weather.

Water-cooled chillers reject heat through a cooling tower. They often suit large facilities with long operating hours and a stable cooling load. Their plant room can be more compact, and their operating performance may be attractive for larger projects.

The system also brings more maintenance tasks. The tower needs cleaning, water treatment, inspection, and careful control of water quality. Poor maintenance can affect heat transfer and shorten equipment life.

I would not select one type from a product brochure alone. The local climate, water supply, maintenance skills, and energy profile all matter.

Efficiency depends on operation, not only the label

A high-efficiency chiller can still perform poorly when the system is badly designed.

Oversizing is a common issue. A chiller selected for a rare peak load may spend most of its time at a low load. Some modern units can reduce output through variable-speed compressors, though the system still needs a suitable control plan.

Part-load performance deserves close attention. Ask suppliers for data at several load points, not only at full load. A building may operate at 30%, 50%, or 70% load for much of the year.

The chilled-water temperature also affects performance. Lower supply temperatures may support certain processes, though they can raise energy use. A higher chilled-water temperature may reduce compressor work when the building design allows it.

Pumps and fans matter as well. A chiller plant can lose efficiency when pumps run at full speed even during periods of low demand. Variable-speed drives and pressure controls may help reduce this waste.

Maintenance affects the value of the system

I treat maintenance as part of the purchase decision, not as a later concern.

A typical maintenance plan may include:

• Checking refrigerant and oil conditions
• Cleaning air-cooled condenser coils
• Inspecting pumps and valves
• Testing sensors and control points
• Checking water quality
• Cleaning strainers
• Reviewing vibration and noise
• Inspecting insulation
• Recording supply and return temperatures
• Comparing actual energy use with expected performance

Water-cooled systems need closer attention to the condenser-water loop. Scale, dirt, and biological growth can reduce heat transfer. A neglected cooling tower may also create health and compliance concerns, depending on local requirements.

The equipment brand matters less when the local service team cannot provide parts, testing, and technical support. I prefer a system with clear service access and available replacement components over a model that looks attractive but has limited support in the area.

A simple way to decide

I use this process when helping a buyer compare a chiller with other cooling options.

Step 1: Define the cooling purpose

Is the system for comfort cooling, process cooling, or both?

Comfort cooling may allow wider temperature changes. A manufacturing process may need tighter control and continuous operation.

Step 2: Map the load throughout the day

Record when the building needs cooling and how much demand changes between morning, afternoon, night, weekdays, and weekends.

A load profile can reveal whether the site needs one large chiller, several smaller units, or a different cooling system.

Step 3: Compare full project cost

Look beyond the equipment price. Include:

• Design and installation
• Electrical upgrades
• Pumps and piping
• Cooling tower or dry cooler
• Controls
• Water treatment
• Service contracts
• Replacement parts
• Energy use
• Planned equipment life

A lower purchase price may not lead to a lower ownership cost.

Step 4: Review future plans

A building that will expand may benefit from a modular system. A fixed system may suit a stable facility with no major changes planned.

I avoid selecting capacity for an uncertain future without a clear expansion plan. Extra capacity has a cost today, while future demand may never arrive.

Step 5: Ask for operating data

Request performance information at different outdoor temperatures and load levels. Ask how the system responds when one zone has low demand.

Good data makes supplier comparisons more useful than broad claims about savings.

A practical example

Imagine a hotel with several hundred rooms, a commercial kitchen, meeting spaces, and a long cooling season. Demand changes throughout the day, but the property still needs cooling across many zones.

A central chiller system may make sense because it can serve multiple areas through one plant. The design team could use several smaller chillers instead of one large unit, allowing the system to match changing demand more closely.

Now consider a small workshop with two offices and one production room. If the cooling demand is limited and the production equipment does not need chilled water, separate air-conditioning units may be easier to install and maintain.

Both businesses need cooling. Their system needs are different.

My view

Chillers are not automatically essential, and they are not automatically overhyped. Their value depends on cooling load, operating hours, control needs, site conditions, and maintenance capacity.

I would consider a chiller when the facility has a large or steady load, several cooling zones, or a process that needs stable chilled water. I would look at simpler systems when the building is small, demand is low, or room-by-room control matters more than central operation.

A sound decision starts with measured demand and a full ownership cost. The equipment should match the building, not the other way around.

Many factories ask whether they really need an industrial chiller. The answer depends on the heat load, required temperature, operating hours, process material, and local climate.

I would not select a chiller just because a nearby factory uses one. A chiller makes sense when uncontrolled heat affects product quality, machine performance, production speed, or worker comfort. If a simple heat exchanger, cooling tower, or air-cooled system can handle the load, a large chiller may create extra purchase and maintenance costs.

A useful starting point is to ask four questions:

• What process needs cooling?
• What temperature must the process maintain?
• How much heat enters the system?
• Will the equipment operate for a few hours or most of the day?

These answers help me decide whether an industrial chiller is suitable.

An industrial chiller removes heat from water, glycol, oil, or another process fluid. The cooled fluid then moves through equipment such as injection molding machines, laser cutters, compressors, reactors, food-processing lines, or testing systems.

A stable fluid temperature can help reduce product variation. It can also support more consistent machine operation when the process produces heat continuously.

I often see a need for a chiller in these situations:

Your process creates heat continuously

Injection molding is a common example. The mold and hydraulic system can become hot during long production runs. When the cooling water temperature rises, cycle time may increase and the finished parts may change in size or surface quality.

A chiller can supply water at a controlled temperature and remove heat from the process loop. The correct unit still depends on mold temperature, flow rate, material, machine size, and production schedule.

Your equipment needs a stable temperature

Laser equipment, laboratory systems, welding machines, and high-speed spindles may lose accuracy when internal temperatures move outside the recommended range.

In this case, cooling is not only about removing heat. It is also about reducing temperature changes. A process that needs 20°C water may not perform well with water that moves between 18°C and 28°C during the day.

Your plant has limited cooling water

Some factories use city water for once-through cooling. This may seem simple, but it can create high water use and unstable temperatures. Local water conditions can also affect pipes and heat exchangers.

A closed-loop chiller can circulate the same cooling fluid through the process. The system still needs regular checks, cleaning, and fluid management, but it may reduce water consumption compared with a once-through setup.

The surrounding air is too warm

A cooling tower may work well when the outdoor air is suitable. Its performance changes when the wet-bulb temperature rises. In a hot or humid area, the leaving water temperature may not be low enough for some processes.

An industrial chiller can provide lower and more controlled temperatures. Air-cooled and water-cooled models have different installation needs, so the choice should match the plant site.

Your process material is sensitive to heat

Food, beverages, chemicals, plastics, and pharmaceutical materials can respond to temperature changes. A small rise may affect viscosity, setting time, product shape, or storage quality.

I would review the process data before selecting equipment. Cooling capacity alone does not show whether the unit will suit the application. The fluid type, allowable temperature range, sanitary requirements, and heat exchanger material also matter.

You may not need an industrial chiller when the heat load is low, the process runs for a short period, or the equipment already has an effective cooling system. A fan, radiator, cooling tower, plate heat exchanger, or packaged air-conditioning system may be enough for certain applications.

A chiller can also be a poor fit when the process temperature is close to the local ambient temperature. The unit may run with limited benefit while still using electricity and requiring maintenance.

I use a simple review process before recommending a model.

Measure the actual heat load

The basic cooling load can be estimated with:

Cooling capacity = fluid flow × specific heat × temperature difference

The result must be converted into the unit used by the supplier, such as kW, tons of refrigeration, or BTU/h.

The calculation should include heat from motors, pumps, hydraulic systems, product materials, sunlight, nearby equipment, and the building environment. Guessing from machine horsepower alone can lead to an undersized or oversized system.

Check the required temperature

Write down the fluid inlet temperature, outlet temperature, target temperature, and acceptable fluctuation.

For example, a process may need 18°C water with a tolerance of ±1°C. Another process may accept 25°C water with a wider range. These two applications need different control approaches, even when their heat loads are similar.

Review the fluid and flow rate

Water is common, but some systems use a water-glycol mixture, thermal oil, or a special process fluid. Each fluid transfers heat differently.

The pump must provide enough flow and pressure for the full circuit. Pipes, filters, valves, heat exchangers, and elevation changes can all affect the required pump size.

Match the chiller type to the site

An air-cooled chiller usually needs less site water and can be easier to install. It needs enough space for airflow and may add heat to the surrounding area.

A water-cooled chiller may suit a plant with an existing cooling tower and water treatment system. It can require more supporting equipment, such as pumps, condenser water piping, and regular water quality checks.

A portable chiller may fit a small machine or a temporary process. A central system may be more suitable when several machines share the same cooling loop.

Consider the operating pattern

A unit that runs eight hours each day has a different energy profile from one that operates around the clock.

I would check load variation as well. If the process load changes often, variable-speed compressors or staged capacity may help the unit follow demand. The control system should not be selected only from the maximum load if the equipment will spend most of its time at a much lower load.

Plan for maintenance

Every chiller needs access for cleaning, inspection, filter replacement, refrigerant checks where applicable, and pump service.

A dirty condenser can reduce heat rejection. Blocked filters can reduce flow. Poor water quality can damage heat transfer surfaces. A maintenance plan should be part of the purchase discussion, not an afterthought.

I once reviewed a cooling problem on a plastic processing line where the operator believed the chiller was too small. The actual issue was restricted water flow caused by a blocked filter and partially closed valve. Replacing the chiller would not have solved the problem. Cleaning the circuit, checking the pump, and confirming the temperature readings restored the expected flow.

This type of problem is common enough to check basic conditions before changing equipment:

• Is the pump working correctly?
• Are all valves open?
• Is the filter clean?
• Is the heat exchanger blocked?
• Are the temperature sensors accurate?
• Is the condenser free from dirt?
• Does the refrigerant system show a fault?
• Has the process load increased since installation?

A good industrial chiller should fit the process, not just the catalog specification. I would compare the required cooling capacity, leaving-fluid temperature, flow rate, ambient conditions, power supply, footprint, noise level, and service access before making a decision.

The best choice may be a chiller, but it may also be a different cooling method. When the process load is measured correctly and the operating conditions are understood, the decision becomes clearer. You can avoid paying for capacity you do not use while reducing the risk of unstable temperatures and unexpected production interruptions.

When a cooling system produces uneven results, the problem often starts long before installation. A small change in tube spacing, airflow, insulation, or testing can affect the working temperature, energy use, and service life of the whole unit.

I have seen buyers focus on the nameplate capacity and overlook the production process behind it. That can lead to a cooler that looks suitable on paper but performs poorly in a busy plant, cold room, food facility, or commercial building.

Better cooling starts with controlled production.

The process begins with the working conditions

I begin by looking at how the cooler will be used.

A unit for a food storage room may face frequent door opening, moisture, and strict temperature control. A system for a production line may run for long hours under a steady load. These applications need different airflow, heat exchange, control settings, and service plans.

The main points include:

• Target temperature
• Room or process load
• Ambient temperature
• Available installation space
• Operating hours
• Power supply
• Cleaning requirements
• Local service conditions

A cooler should match the actual site, not just a general product list.

Material choice affects daily performance

The heat exchanger is one of the key parts of a cooling system. Tube material, fin design, coating, and spacing all influence heat transfer and cleaning work.

For areas with high humidity, corrosion resistance needs close attention. For food-related spaces, the surface should support regular cleaning. A design that traps dust or water may require more maintenance and may lose cooling capacity over time.

I prefer to connect material choice with the customer’s working environment. A lower purchase price may not reduce total cost if the unit needs frequent cleaning, repair, or early replacement.

Stable production needs process checks

A reliable cooler is not made through one final inspection alone. Each stage needs a clear check.

The production flow may include:

1. Confirming the design and operating data
2. Checking incoming materials
3. Forming and assembling the coil
4. Installing fins, fans, casing, and controls
5. Checking connections and insulation
6. Testing pressure and leakage
7. Running performance checks
8. Recording test results before shipment

These checks help reduce problems that may appear after installation. Pressure testing can help find leakage. Electrical testing can help identify wiring faults. Airflow checks can show whether the fan and coil work together as expected.

I also believe that production records should be easy to read. When a customer asks about a batch, the factory should be able to trace the main materials, test data, and inspection results without delay.

Small design choices can change the result

Airflow is a common example.

If air passes through the coil too quickly, heat exchange may not work as expected. If airflow is too low, the system may not reach the required load. Fan selection, fin spacing, coil depth, and installation clearance need to work as one design.

Drainage also deserves attention. In a humid room, water can collect quickly. A suitable drain pan, correct slope, and proper insulation help lower the risk of water leakage and frost-related issues.

A factory that checks these details during production gives installers a clearer path during commissioning.

A practical example

A small cold-storage operator may install a cooler with enough stated capacity but place it too close to a wall. The restricted airflow can reduce performance. Dust on the coil can create another problem. If the unit was not selected for the room’s door-opening pattern, the cooling load may be higher than expected.

The solution is not always a larger machine. The operator may need better installation clearance, a cleaning schedule, a suitable control setting, or a cooler designed for the actual room conditions.

This is why I ask for site information before suggesting a product. A clear answer at the start can prevent extra work later.

Better results come from a complete view

Good cooler production combines suitable materials, controlled assembly, clear testing, and practical support. Product performance depends on the factory process, the installation site, and the way the unit is maintained.

When I assess a cooling product, I look beyond appearance and rated capacity. I check how it is made, how it is tested, how it fits the working environment, and how easily the customer can maintain it.

That approach helps turn a cooling unit from a basic purchase into equipment that supports steady daily operation.

A chiller may sit in a plant room, on a roof, or beside a production line. Most people notice it only when cooling stops. Then product quality, indoor comfort, machine performance, and daily output can all be affected.

I see chillers as support equipment that helps a business control temperature with steady results. They remove heat from water or another fluid, then send the cooled fluid to equipment, air-handling units, process lines, or storage areas. The cooling method looks simple, but the right system can affect operating cost, maintenance work, and production stability.

A chiller matters because temperature control matters.

A food-processing plant may need chilled water for mixing, storage, packaging, or product cooling. If the water temperature changes too much, the process may become harder to control. A factory that uses CNC machines, lasers, or molding equipment may also need cooling to protect machine parts and keep operating conditions stable.

A commercial building has a different need. The chiller supplies cooled water to air-handling units throughout the building. These units help control indoor temperature and humidity in offices, hotels, hospitals, shopping centers, and public facilities.

The equipment is not chosen by capacity alone. I would look at the full cooling task before selecting a model.

The main points include:

• Heat load from machines, lighting, people, and outdoor weather
• Required water temperature
• Flow rate and pressure
• Daily operating hours
• Indoor or outdoor installation
• Available space
• Local water quality
• Power supply
• Service access
• Noise limits
• Seasonal temperature changes

A chiller that is too small may struggle during high-load periods. A system that is much larger than the actual need may cycle too often and use more power than expected. The load should be measured as carefully as possible instead of relying only on a rough estimate.

Energy use is another reason chillers deserve attention. A chiller can run for many hours each day, so small operating differences may affect the monthly power bill. The result depends on the compressor, condenser type, water temperature, ambient conditions, control method, and maintenance state.

Air-cooled chillers reject heat through fans and air coils. They may suit sites with limited water supply or a simpler installation plan. Water-cooled chillers use cooling towers or another water circuit to reject heat. They may work well in larger facilities, though they need water treatment, cleaning, and more equipment around the cooling loop.

Neither option fits every project. I would compare installation conditions, water availability, service resources, and expected load before making a choice.

Controls also affect day-to-day performance. A basic system may run at one fixed speed, while a system with variable-speed control can adjust compressor or pump operation as the load changes. When a building or process needs less cooling, the system may reduce output instead of running at full capacity.

Sensors need attention as well. A faulty temperature sensor can make the chiller run longer than needed or stop before the process reaches the required condition. Clear alarms help operators respond to high temperature, low flow, high pressure, and other operating issues.

Maintenance protects the cooling process. I would include these checks in a service plan:

• Clean air coils or condenser surfaces
• Check chilled-water flow
• Inspect filters and strainers
• Test pumps and valves
• Review refrigerant pressure
• Check electrical connections
• Inspect insulation
• Test temperature and pressure sensors
• Clean cooling towers when used
• Record operating data

A maintenance record gives the service team useful information. If leaving-water temperature starts to rise over several weeks, the change may point to fouled coils, low flow, sensor trouble, or a developing compressor issue. Early review can make the repair easier to plan.

Water quality deserves special attention in systems that use cooling towers or open water circuits. Scale can reduce heat transfer. Corrosion can damage components. Biological growth can affect the water loop and create health concerns when the system is not managed properly. A suitable water treatment plan should match the equipment and local conditions.

One practical example is a packaging plant that runs several production lines during the day. The plant may have a chiller that supplies water to machine jackets and air-handling units. When filters become blocked and condenser surfaces collect dust, the system may need more time to reach the target temperature. Operators may respond by lowering the set point, but that does not fix the cause. Checking airflow, water flow, and heat-transfer surfaces gives the maintenance team a better path.

The same idea applies to office buildings. If some rooms are cold while others remain warm, the chiller may not be the only cause. Airflow balance, valve settings, pump operation, insulation, and control sensors can all affect comfort. Replacing the chiller without checking the wider system may not solve the problem.

I also pay attention to refrigerant selection and service records. Refrigerant rules vary by location, and system work should be handled by trained technicians who understand the equipment and local requirements. A service team should keep clear records of refrigerant handling, repairs, pressure checks, and component replacement.

The useful question is not simply, “How powerful is this chiller?” A better question is, “Can this system provide the required cooling under the conditions of this site, with a service plan the team can manage?”

A good chiller plan connects equipment selection, load calculation, installation, controls, water management, and maintenance. When these parts support each other, the cooling system is easier to monitor and the business can reduce avoidable operating problems.

Chillers matter because many processes depend on stable temperature. The best result does not come from choosing the largest unit or the most complex control panel. It comes from matching the system to the actual load, checking performance through useful data, and keeping maintenance work consistent.

Hot weather can push cooling costs up quickly. I often see households lower the thermostat, run the air conditioner for long hours, and still feel uneven temperatures from room to room. The result is a higher bill without much extra comfort.

A smart cooling plan starts with small checks, clear settings, and equipment that matches the home.

Start with the thermostat

A programmable or smart thermostat can adjust the indoor temperature when people are sleeping, working, or away. I prefer settings that change gradually rather than large temperature swings.

A practical schedule may look like this:

• A slightly higher setting when the home is empty
• A comfortable setting during occupied hours
• A moderate setting at night
• Manual changes only when the schedule no longer fits the day

A thermostat should be installed away from direct sunlight, cooking heat, supply vents, and drafty doors. Its reading affects the whole cooling cycle, so location matters.

I also avoid setting the temperature far below the target. A very low setting does not cool the room instantly. It can make the system run for a longer period while using more electricity.

Check the air filter

A dirty filter restricts airflow. The system may need to work harder, while some rooms receive less cool air.

I check the filter every month during heavy cooling use. Homes with pets, renovation dust, or frequent occupancy may need more frequent checks. The replacement schedule depends on the filter type and the equipment maker’s instructions.

The new filter should fit properly. A loose or overly dense filter can create its own airflow problem.

Keep sunlight outside

Windows can add a large amount of heat during the afternoon. Curtains, blinds, exterior shades, and solar screens can help reduce that load.

I focus on windows that receive direct sun for several hours. Closing coverings before the room heats up works better than waiting until the glass and furniture are already warm.

Sealing gaps around doors and windows can also help. Weatherstripping and caulk are simple items, yet they can reduce the amount of conditioned air that escapes.

Use fans with a clear purpose

Ceiling fans do not lower the room temperature. They help people feel cooler by moving air across the skin.

I switch fans off when a room is empty. This avoids using electricity without adding comfort. A fan can let some households choose a slightly higher thermostat setting while maintaining a similar comfort level, though personal preference and humidity still matter.

Give the outdoor unit room

Leaves, grass, and stored items can block airflow around an outdoor condenser. I keep the area clear and remove light debris carefully.

The unit should not be covered during normal warm-weather operation. A blocked condenser may lose efficiency and place extra strain on the system.

Electrical parts and refrigerant work require a qualified technician. I do not recommend opening the equipment or attempting repairs without the right training.

Cool the occupied rooms

Many homes do not need every room cooled in the same way. Closing doors to unused spaces may help in some layouts, yet fully closing too many vents can affect system pressure.

A zoning system may offer more control for homes with separate floors, large additions, or rooms that are rarely used. The right setup depends on duct design, insulation, equipment size, and local climate.

A two-story home may feel warmer upstairs because heat rises and the upper floor receives more sun. A technician can check airflow, duct leakage, insulation, and thermostat placement before recommending new equipment.

Review the system before replacing it

A higher bill does not always mean the air conditioner needs to be replaced. The cause may be a clogged filter, leaking duct, poor insulation, incorrect refrigerant charge, or a thermostat problem.

When I compare repair and replacement options, I look at:

• The system’s age and service history
• Monthly energy use
• Room comfort and airflow
• Repair frequency
• Available efficiency ratings
• Installation quality and total cost

A new unit should be sized for the home, not selected only by capacity. An oversized system may cycle on and off too often, which can affect comfort and humidity control.

For example, a family may notice that the living room stays cool while the upstairs bedroom remains warm. Replacing the entire system may not solve the issue if the real cause is a blocked return grille or an uninsulated attic. A basic inspection can point to a smaller fix.

Smart cooling is less about one device and more about how the home, equipment, and daily habits work together. A thermostat schedule, clean filter, shaded windows, clear outdoor unit, and professional system check can create a more balanced approach to comfort and energy use.

Want to learn more? Feel free to contact Wang Jianliang: 411868414@qq.com/WhatsApp +8613819409755.

1. ASHRAE 2022 HVAC Systems and Equipment Handbook: Chilled-Water Systems

2. Trane Technologies 2021 Chiller Plant Design and Optimization Guide

3. Carrier 2020 Commercial HVAC Equipment and Energy Efficiency Handbook

4. U.S. Department of Energy 2023 Best Practices for Commercial Cooling Systems

5. McQuay 2021 Industrial Chiller Application and Maintenance Manual

6. International Energy Agency 2022 Energy Efficiency in Cooling Systems