Greenhouse Radiant Heater
7 September 2025
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An evaporative cooler is one of the simplest and most cost-effective cooling systems, using the method of water evaporation to cool the air. The operation of these devices is based on one of the fundamental principles of physics: “cooling through evaporation.” In this system, water is spread onto an absorbent material, such as aspen pads or cellulose pads, and then air passes through the material. As a result, the water evaporates and absorbs heat from the air, a process that cools and humidifies it.
With the advancement of technology, a newer generation of materials like evaporative cooler cellulose pads has replaced traditional aspen pads. These pads are used in various evaporative coolers and home coolers, such as the cellulose pad for the Cooler 7000 and other capacities. These pads have numerous advantages over the old aspen pads.
The difference between aspen pads and cellulose pads Aspen Pads Aspen pads are made from natural fibers or lightweight synthetic materials (such as wood shavings) and are common in traditional coolers. These materials have the ability to absorb water due to their porous structure, but they also have drawbacks compared to the evaporative cooler cellulose pad in a cellulose evaporative cooler:
Cellulose pads are considered a better replacement for aspen pads in evaporative coolers. These pads are made from a regular and dense structure composed of cellulose sheets. Their key features are:
One of the most important reasons for replacing aspen pads with cellulose pads is the improvement in cooling quality and the reduction in maintenance costs. Unlike aspen pads, the cellulose pad has a higher resistance to sedimentation and significantly reduces the need for frequent replacement or cleaning. Additionally, the uniform water coverage on these pads allows for cooler air with better humidity to enter the environment. Also, this evaporative cooler cellulose pad is a suitable option for hot and dry regions, as it has an optimal ability to lower the temperature and combat heat.
Overall, it must be said that evaporative coolers are one of the most widely used cooling systems in hot and dry regions. With the emergence of various types of cellulose pads, the efficiency of these coolers has increased dramatically. Compared to traditional aspen pads, these pads are more efficient, more hygienic, and have a longer lifespan. Choosing a cellulose pad instead of an aspen pad can not only improve the quality of cooling but also reduce long-term maintenance costs and water consumption.
Read more ← Low-Consumption Evaporative Cooler
In recent years, a new technology has been used in evaporative coolers that has significantly upgraded their performance and efficiency. This technology, designed based on the use of evaporative cooler cellulose pads instead of traditional aspen pads, has become one of the most important advancements in evaporative cooling systems due to its improved cooling capability and increased durability.
The evaporative cooler cellulose pad is a cooling material made from kraft paper. Due to its specialized design, it is considered a suitable replacement for traditional aspen pads. These pads are composed of thin but dense cellulose layers. They can absorb a greater volume of water and distribute it uniformly across the pad’s surface. This uniformity in water absorption and distribution allows the evaporation process to occur more effectively when hot, dry air passes over the cellulose pad, resulting in cooler and more humid air.
The cellulose pad is typically produced in square or rectangular shapes and is installed vertically in evaporative coolers. The design of these pads is such that in addition to increasing air cooling, they also optimize the cooler’s water consumption.
The cellulose pad has unique features that distinguish it from conventional aspen pads. These advantages are:
Increased cooling efficiency
Due to the regular and dense structure of the evaporative cooler cellulose pad, the process of water evaporation and heat absorption is carried out in a uniform and effective manner. This feature leads to a more effective reduction of air temperature compared to conventional aspen pads.
More water absorption
The cellulose pad creates more cooling due to its high capacity for holding water. Unlike the aspen pad, in which water is distributed unevenly, these pads hold water uniformly and prevent the pad’s surface from drying out quickly.
More durability and a longer lifespan
The cellulose pad has a higher resistance to damage, wear, and the formation of mineral deposits. This makes the need for replacing these pads much less frequent than for aspen pads, which consequently reduces maintenance costs significantly.
Better Hygiene
Traditional aspen pads, due to their irregular structure, are a suitable environment for the growth of bacteria, fungi, and the creation of unpleasant odors. In contrast, the uniform and antibacterial structure of the evaporative cooler cellulose pad minimizes these problems and helps create a healthier and cleaner airflow.
Water Consumption Optimization
These pads reduce water consumption and increase cooler efficiency due to their ability to absorb and retain high levels of moisture. This feature of the evaporative cooler cellulose pad is especially important in regions with water scarcity issues.
Technological advancements in the manufacturing of cellulose pads have made these products an ideal option for modern evaporative coolers. The engineered design of these pads leads to reduced airflow friction and less noise compared to old aspen pads. Furthermore, the evaporative cooler cellulose pad can more effectively cool the environment by maintaining high levels of cooling efficiency, reliably lowering the air temperature, and increasing relative humidity.
Another advantage of this technology is its better compatibility with hot and dry climatic conditions. Since hot and dry regions typically face a lack of air humidity, using a cellulose pad can increase air humidity in addition to providing cooling.
The use of the evaporative cooler cellulose pad as a new generation in evaporative cooling systems has significantly improved cooler performance, reduced maintenance costs, and increased the device’s lifespan. With advantages such as more cooling, reduced water consumption, and better hygiene, this technology is considered an excellent replacement for traditional aspen pads.
Therefore, if you are looking for a more efficient, durable, and hygienic cooler, you will not find a better option than evaporative coolers equipped with a cellulose pad.
The evaporative cooler cellulose pad, as one of the key components in evaporative coolers, plays an important role in improving the performance of these devices. Due to their high water absorption capacity, these pads cool the air faster. While conventional aspen pads are only effective up to a temperature of 53 degrees Celsius, cellulose pads have overcome this limitation.
Reduced water consumption
The evaporative cooler cellulose pad effectively absorbs and retains water, which leads to reduced water consumption in evaporative coolers. This feature is important in two aspects: firstly, saving water resources, especially in regions facing water scarcity. Secondly, reducing the costs associated with water supply and use.
Increased Efficiency
Due to their high water absorption capability, cellulose pads cool the air faster. This makes evaporative coolers with cellulose pads more efficient and improves their air cooling ability, which is very important in hot seasons and regions with high temperature and humidity.
Reduced Repair and Maintenance Costs
The use of the evaporative cooler cellulose pad typically reduces repair and maintenance costs because these pads have a longer useful life and require less frequent replacement. This can reduce the costs associated with replacing the pads and, consequently, the overall cost of the coolers.
Higher Thickness and Air Filtration
Due to its greater thickness and more integrated structure, the cellulose pad filters dust particles well and prevents pollutants from entering the environment. In evaporative coolers with simple aspen pads, due to the low thickness and open space between the pads, environmental pollutants easily enter the environment. This problem is felt more in large cities like Tehran and Alborz, which face air pollution. The evaporative cooler cellulose pad can play an important role in reducing pollutants entering the environment. It can also prevent respiratory diseases caused by air pollution.
Better Cooling Quality and Increased Evaporative Cooler Efficiency
Given the mentioned features and advantages, the use of cellulose pads in evaporative coolers has received significant attention due to reduced water consumption, improved cooling quality, increased performance and outgoing air quality, as well as reduced repair and maintenance costs.
Conclusion on the Advantages
The cellulose pad, by offering multiple advantages, including reduced water consumption, increased efficiency, and improved air quality, has become an ideal option for evaporative coolers. These pads not only help improve the performance of coolers but also, by reducing maintenance costs and increasing the device’s lifespan, are considered an economical and efficient choice for consumers.
Depending on the demand and type of application and use in the industry and in various coolers, cellulose pads are produced in different sizes and dimensions:
All the mentioned sizes are available on this page from Dadman Tahvieh’s products. You can choose your desired size and order your evaporative cooler cellulose pad individually or as a three-piece pack.
As a replacement for traditional aspen pads, the use of cellulose pads in evaporative coolers has become common in recent years. These pads come with specific advantages and disadvantages, which we will examine in detail below.
High water absorption capacity
Due to their fibrous structure, cellulose pads have a very high water absorption capacity. Depending on the type and quality of the pad, this capacity can be up to 50 liters of water per pad. High water absorption leads to more effective air cooling, and as a result, the cooler reaches the desired temperature with less water consumption.
Higher Efficiency and Lower Water Consumption
The retention of moisture in the structure of the evaporative cooler cellulose pad increases cooling efficiency. In other words, by absorbing and retaining water better, the cellulose pad, compared to aspen pads, provides more moisture for evaporation and cooling. This leads to a significant reduction in the evaporative cooler’s water consumption.
Longer Lifespan
One of the most important advantages of the cellulose pad is its longer lifespan compared to aspen pads. Given their more durable material and more integrated structure, cellulose pads, with proper maintenance, can be used for years. Based on this, they reduce the costs of cooler replacement and maintenance. Of course, the lifespan of the pads depends on various factors such as the quality of the pad itself, the type of water used, and the maintenance method.
Air Filtration
The dense structure of cellulose pads prevents the entry of dust and airborne pollutants into the cooler. This feature is especially important in urban areas with air pollution and helps improve the quality of the air exiting the cooler.
Dimensional Stability
Due to its solid and integrated structure, the evaporative cooler cellulose pad does not lose height or its dimensions from water absorption and long-term use. This helps maintain the cooler’s efficiency over time.
Easy Installation and Maintenance
Cellulose pads are easy to install and replace. This is a significant advantage compared to aspen pads, which require more precision and time for placement.
Uniform Water Distribution
The capillary action of the evaporative cooler cellulose pad causes water to be distributed uniformly over its entire surface. This property prevents water from accumulating in different spots. This leads to an increase in the cooler’s cooling efficiency.
Higher Price
The price of a cellulose pad is significantly higher than traditional aspen pads. However, the longer lifespan and reduced maintenance costs in the long run fully compensate for this price difference.
Initial Unpleasant Odor
In some cases, an unpleasant odor may be felt during the first days of using cellulose pads. However, this problem is usually completely resolved easily by thoroughly washing the evaporative cooler cellulose pad and draining the cooler’s water. It is recommended to drain and refill the cooler’s water several times at the start of use to resolve this issue and to prevent it from occurring in the first place.
Considering its advantages and disadvantages, the evaporative cooler cellulose pad can be a suitable replacement for traditional aspen pads in evaporative coolers, especially in regions facing water scarcity or air pollution. However, before making a choice, various factors, including price, cooler type, and environmental conditions, must be taken into account.
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