Dadman Cooling Products
Household coolers come in a wide variety of models with different motor powers, ranging from 3500 to 7500. Based on their cooling system, these products can be divided into two main categories:
Nothing is more pleasant than a delightful coolness on a hot summer afternoon, and a household cooler fulfills this desire. However, you should know that evaporative coolers come in various types. The first category is the evaporative cooler, which uses an electric motor and either traditional evaporative pads or cellulose pads to cool the air inside the unit. The second category consists of gas coolers, which use a completely different cooling system.
The company Dadman Tahvieh will further introduce the features of different types of evaporative coolers, their prices, a guide for choosing the right product, and more.
A household cooler can be seen on the rooftops or terraces of many homes and apartments. Hot outdoor air is cooled as it passes through the wet pads or cellulose pads inside the unit. The cooled air is then distributed throughout the building via ducts.
An important point when choosing a cooler for your needs is the square footage of your residential unit. We will provide more details on how to correctly estimate the capacity of a household cooler for your apartment later in this article.
Before we provide the necessary information about the different types, advantages, and selection methods for household coolers, we would like to inform you that all types of Dadman Tahvieh evaporative coolers are offered with a 36-month warranty.
To choose the right evaporative pad or cellulose cooler for your needs, you should consider a few key points.
How you calculate and choose a household cooler depends on the square footage of the apartment and whether the unit is located directly under the building’s roof. Generally, units on the top floor are under direct, hot summer sunlight and need a cooler with a higher cooling capacity. In some cases, these units may even need a split AC unit as a supplementary system.
Another important point is that the airflow capacity of evaporative coolers should be chosen to match the square footage of the usable space. Additionally, the local climate conditions (in terms of temperature and humidity) play a decisive role in choosing the right household cooler.
To summarize, here are the key factors to consider:
Some users ask, “Why not just choose a cooler with the highest capacity to be on the safe side?” The answer is that selecting the highest capacity isn’t always the best choice.
Based on these points, the dimensions of the air vents from your cooler’s ducts should be chosen so that the air exits each vent at a speed of approximately 400 to 600 feet per minute.
The following table displays the suitable coverage area for a household cooler based on its cooling capacity. The table takes into account each cooler model (or capacity) for both hot/dry and cold/temperate climates.
For example, cities in Iran that can be used for reference include Tehran, Shiraz, Semnan, Isfahan, Kermanshah, Mashhad, Tabriz, Khorramabad, Shahroud, and Kermanshah. Outside of Iran, some examples are Samarkand, Dushanbe, Khujand, Erbil, Kabul, Ankara, Sulaymaniyah, Mosul, Kirkuk, Ashgabat, Aleppo, and Mazar-e-Sharif.
The first table is for evaporative pad coolers, and the second table is for cellulose coolers.
Choosing the Right Household Cooler Model (Capacity)
| Model (Capacity) Evaporative Pad Cooler | Square Footage for Top Floor | Square Footage for Middle Floors |
| 3500 | 60 sq. meters | 70 sq. meters |
| 4500 | 70 sq. meters | 80 sq. meters |
| 5500 | 100 sq. meters | 120 sq. meters |
| 7000 | 130 sq. meters | 150 sq. meters |
| Model (Capacity) Cellulose Cooler | Square Footage for Top Floor | Square Footage for Middle Floors |
| 3500 | 70 sq. meters | 80 sq. meters |
| 4500 | 80 sq. meters | 90 sq. meters |
| 5500 | 110 sq. meters | 130 sq. meters |
| 7000 | 140 sq. meters | 160 sq. meters |
There are two main types of evaporative coolers for residential use: portable evaporative coolers and stationary evaporative coolers.
Stationary evaporative coolers have two main types based on their cooling method: evaporative pad coolers and cellulose pad coolers.
Household coolers are divided into two categories based on their location and airflow method:
When maintaining a household cooler, it’s vital to be aware of the high number of electrical shock incidents that occur during service. Before any seasonal or annual service, you must either turn off the device’s main power switch or hire an experienced technician.
Based on the technical information and reasonable prices available on the specialized Dadman Tahvieh website, we hope that you, our valued customer, will carefully review the technical specifications, feel confident in our genuine warranty and fast delivery, and choose us as your destination for purchasing the products you need.
We serve a wide range of clients, from individuals making a single purchase to companies and construction projects requiring bulk orders. For this reason, you can contact our support team at any time, day or night.
Using a household evaporative cooler is generally recommended as a common and effective method for cooling, especially in hot and dry climates where the relative humidity is below 40%.
In these regions, evaporative coolers provide cool air by adding moisture to the passing air. This process prevents the air from becoming too dry, which in turn stops wooden items from cracking and static electricity from building up. It also helps to soften the air and make it more pleasant.
From a scientific standpoint, it’s better to use gas coolers and split units (air conditioners) in hot and humid regions. In contrast, it’s best to use an evaporative cooler to get cool air in dry and temperate climates.
The main advantages and reasons for using a household evaporative cooler are:
The first step in buying a cooler is to consider the dimensions of your space and the capacity of the household cooler. These coolers are produced in various types with different airflow capacities, so you should consider the dimensions and use of your space before you buy one to ensure you make the right choice.
The second step should be to check things like the energy consumption, features, brand, and advantages of the evaporative cooler. The Dadman Tahvieh website provides technical information for all types of household cooler models.
We suggest that before you finalize your purchase, you compare the final dimensions of the cooler with the dimensions of the entrance door to the rooftop or any other space where you will install it, just to make sure the cooler can be moved through the space. Although this is usually taken into account during the construction of a residential apartment.
The price of a household cooler varies depending on its capacity and brand. To make your purchase easier, you should first determine the capacity you need.
The Dadman Tahvieh website provides technical information on a variety of household cooler models. All products are offered with a genuine warranty, fast delivery, and a reasonable price. You can also find a product ID for every cooler on our website.
Safety is extremely important when operating household coolers. One of the most significant dangers faced by homeowners or technicians during the service and operation of a household cooler is the risk of electrocution. These coolers are constantly wet, which increases the risk of electric shock.
The body of a household cooler is made of metal, and its wiring can sometimes be unclear. Therefore, it is best to leave their repair and servicing to specialists and never attempt to repair or service them on your own.
If you have recently moved into a new home and need to replace the household cooler’s pads, be sure to use a voltage tester to check the cooler’s body for any electrical current before proceeding. Ideally, evaporative cooler electrical systems should have a life protection system (like an RCD – Residual Current Device) that automatically cuts off power in case of any electrical fault, preventing harm to the technician.
If you do decide to service the household cooler yourself, always ensure that the cooler is completely switched off before you begin any work. It’s also recommended to go to the rooftop with another family member or at least inform someone about your intention to service the cooler.
When starting the air cooler, you should open a kitchen window or one of the room windows just enough so that the indoor air of the apartment can exit through the cooler’s vents, and the kitchen’s air also remains slightly open. Ensure that the home air cooler’s vent is not installed inside the kitchen to prevent the cooler’s airflow from extinguishing the stove flame.
If you intend to install a home air cooler on the building’s rooftop, carefully check the required cooler dimensions and its possibility of passing through the rooftop door before purchasing. Fixed evaporative coolers must be installed on appropriately high stands, which should be purchased separately.
Paying attention to the precise leveling and horizontality of the cooler is one of the vital points in its installation. Failure to observe this can lead to uneven water distribution on the cooling pads or cellulose pads, which will reduce the cooling efficiency of the air exiting the home air cooler.
If the cooler is installed unlevel, the cooler’s centrifugal fan will gradually face imbalance and vibration, leading to noise and damage to the bearings. These vibrations will eventually transfer to the body, causing overall damage to the home air cooler.
You should replace the cooler pads every year. Have the cooler serviced by a technician, ensuring that the internal surfaces and floor of the home air cooler are also thoroughly cleaned. This is important because cooler pads are contaminated with dust, fungi, and bacteria, and these pollutants are carried into the house with the airflow.
The time for replacing cooling pads in a home air cooler is at least once a year (twice in polluted cities like Tehran). Also, the replacement time for cellulose pads in evaporative coolers is approximately once every 3 to 5 years, depending on the water’s mineral content and the air quality at the cooler’s installation location.
Using cellulose pads instead of traditional cooling pads in home air coolers offers advantages such as greater cooling efficiency and better filtration of airborne particulate matter.
However, when replacing the pads, it’s important to note that due to the use of glues and resins in the manufacturing of cellulose pads, the water passing over them should be drained several times before use to prevent their unpleasant odor from entering the indoor space.
Given the air cooling method in all models of evaporative coolers, it is important to choose an installation location that allows the home air cooler to draw in fresh air, preventing the air from becoming humid or stale inside the building.
Furthermore, considering the common use of evaporative coolers in regions with dry summer air and these devices’ high water and electricity consumption, it is essential to combine cooler performance control with the installation of a thermostat in the electrical circuit. This allows for better control over the cooler’s operation and reduces unnecessary water and electricity consumption. (Of course, the exact amount of water consumption in each type of home air cooler depends on various factors including its dimensions, capacity, airflow, air temperature, relative humidity, and operating duration).
At the end of summer, we highly recommend placing a cover over your household cooler. This simple action prevents several issues:
Proper ductwork is crucial for a household cooler. The amount of cooling and airflow directly depends on the correct duct matching. The user manual for each evaporative cooler model can also be a helpful guide.
For proper ductwork installation, you should follow engineering calculations and standards, including the duct dimensions, the volume of air passing through, and the branching.
To increase your cooler’s efficiency, it’s recommended to protect it and its duct from direct sunlight. You can do this by installing a shade over the cooler and insulating the duct. According to national building codes, if a cooler’s duct is exposed to direct sunlight for more than 2 meters, insulation is mandatory.
To ensure the correct dimensions for your household cooler’s ductwork, you must refer to engineering tables and calculations.
An evaporative cooler is made up of two main sections: mechanical and electrical.
Mechanical Section
This section includes the following components:
Electrical Section
This section includes the following components:
Water scale in air coolers can reduce the lifespan of mechanical and electronic components. Water pump failure, clogged water hoses, float malfunction, motor burnout, etc., are common problems that can occur due to neglecting the cleaning and removal of scale from household air coolers. The following methods can be used to solve these problems:
Using cellulose pads for air coolers: The best way to prevent scale formation in air coolers is to use air coolers with cellulose pads. These pads have a porous structure that allows for scale removal.
Using muriatic acid or bleaching agents: You can use muriatic acid or bleaching agents to remove scale from household air coolers, but you must be careful as these materials are acidic and dangerous.
Using a vinegar solution: Vinegars have descaling properties and can help remove scale. For this, you can use a solution of water and vinegar or pure vinegar to remove scale from the air cooler.
Regularly changing the air cooler water: By changing the air cooler water regularly and monthly, fewer deposits will accumulate.
Using scale inhibitors: Using scale inhibitors is one of the best ways to prevent the accumulation of scale in household air coolers. These scale inhibitors have special formulas that can remain in the air cooler water for a long time and prevent scale from being absorbed by the pads and the cooler body.
Dear users, if after reading the information provided above, you still have more questions about purchasing a household air cooler (pad or cellulose type) or any other type, you can use our 24-hour support. You can also visit the official Dadman Tahvieh website to purchase our other products, such as kerosene heaters.
What are the main types of household air coolers and what are their differences?
Household air coolers are divided into two main categories: evaporative coolers (water-based) and gas coolers (split units). Evaporative coolers operate on an evaporative cooling system; meaning hot air passes through wet pads (wood wool or cellulose) and is cooled. These coolers are further divided into “wood wool” and “cellulose” types. Wood wool coolers use wood wool for cooling, which may decrease in efficiency over time. In contrast, cellulose pad household coolers utilize cellulose pads which, due to their continuity and better water absorption, provide up to 15% more cooling (about 2 to 3 degrees Celsius) and also prevent airborne particles and bacteria from entering the environment.
Fixed evaporative coolers are usually installed on rooftops or terraces and require ducting, while portable coolers do not require fixed installation. Gas coolers (split units) use a different cooling system and are generally more suitable for hot and humid regions, whereas evaporative coolers are recommended for hot and dry regions.
What factors are effective in choosing the right capacity for a household air cooler?
Choosing the appropriate capacity for a household air cooler is of paramount importance to prevent both excessive cooling and insufficient cooling. Key factors in this selection include:
Useful area of the apartment/place of use: The larger the area, the higher the capacity required.
Apartment floor: Units directly under the roof (top floors) require a cooler with higher cooling capacity due to direct sunlight exposure, and may even need an auxiliary system like a split unit in some cases.
Regional climate conditions: Air temperature and relative humidity of the region play a role in determining the required capacity. Evaporative coolers perform best in hot and dry regions with relative humidity less than 40 percent.
It is important to note that choosing a household air cooler with the maximum capacity is not always the best option, as it can lead to undesirable cold, annoying noise due to excessive airflow in ducts and vents, and wasted additional costs.
Why should a household evaporative cooler be regularly serviced and maintained?
Regular servicing and maintenance of a household evaporative cooler are crucial for increasing the device’s lifespan, maintaining cooling efficiency, and ensuring safety. Some of the main reasons include:
Air health: The wood wool or cellulose pads of the cooler become contaminated with dust, mold, and bacteria over time. Failure to replace them promptly leads to the transfer of these contaminants into the home environment. It is recommended to replace wood wool at least once a year (more often in polluted cities) and cellulose pads every 3 to 5 years.
Prevention of scale: Water scale (limescale) can reduce the lifespan of mechanical and electrical components such as the water pump, clog hoses, and cause float malfunction. To prevent this problem, methods such as using cellulose pads, regularly changing the water, using a vinegar solution, or scale inhibitors can be employed.
Optimal performance: Correct leveling of the household air cooler during installation, cleaning the internal surfaces and floor of the cooler, and duct insulation (if necessary) help increase cooling efficiency and prevent damage to the fan and bearings.
Safety: Evaporative coolers pose a risk of electric shock due to the humid environment. Before any service, it is essential to ensure the device is completely off and, if possible, check the body with a phase tester. It is recommended that specialized repairs and services be carried out by experts.
Using cellulose pads instead of wood wool in household air coolers offers significant advantages that lead to improved performance and quality of cooled air:
Greater Cooling: Due to their regular, corrugated, and uniform structure and higher water absorption property, cellulose pads provide a more even distribution of water. This increases the heat exchange surface and, consequently, provides more cooling (approximately 2 to 3 degrees Celsius better than wood wool).
Better Air Filtration: The dense and continuous structure of cellulose pads can prevent airborne particles, dust, and even bacteria from entering the household air cooler ducts and the home environment, which helps improve indoor air quality.
Greater Durability: Unlike wood wool, which may lose its consistency after a while, cellulose pads have greater durability and stability and require less frequent replacement (about once every 3 to 5 years compared to wood wool, which needs annual replacement).
Reduced Scale: Cellulose pads have a networked structure that allows for the cleaning of deposits and can be effective in preventing scale accumulation in the cooler.
However, it should be noted that when replacing cellulose pads, due to the use of glue and resin in their construction, the water passing over the pads must be drained several times to eliminate the initial unpleasant odor.
Safety is extremely important when working with a household cooler, especially due to its wet, electrical nature. Here are the most vital safety tips:
Following these tips can significantly prevent accidents and the risk of electrocution.
Correct ductwork and proper insulation for your household cooler play a vital role in cooling efficiency, preventing energy waste, and maintaining the health of the appliance.
Matching Cooler Capacity
The amount of cool air a cooler provides depends directly on the dimensions and quality of its ductwork. If the ducts and air vents aren’t sized correctly for the cooler’s capacity, the cool air will flow at an improper speed—either too fast or too slow. This can lead to annoying noise or insufficient cooling.
Preventing Energy Waste
If your household cooler’s ductwork is exposed to direct sunlight, the sun’s heat will warm the air inside the duct, causing some of the coolness to be wasted. Insulating the ducts, especially if more than two meters are exposed to the sun, prevents this energy loss and increases the cooler’s efficiency. Installing a sunshade on the cooler itself also helps maintain the optimal temperature of the water and pads.
Following Engineering Standards
Ductwork should be installed based on engineering calculations and standards that consider the duct’s dimensions, air volume, and branching. Using engineering tables and ductulators is recommended to ensure the correct duct size is chosen for an efficient airflow.
Ultimately, incorrect ductwork and a lack of insulation can severely reduce your household cooler’s effectiveness, forcing it to consume more energy to reach your desired level of coolness.
The correct physical installation of an evaporative cooler, especially stationary models, is essential for optimal performance and a long lifespan.
Following these tips during installation will help your evaporative cooler perform optimally and without problems for a long time.
Using evaporative coolers, especially in hot and dry climates, has several advantages compared to air conditioners.
However, it’s worth noting that the efficiency of an evaporative cooler is highly dependent on the relative humidity of the air. In hot and humid regions, air conditioners provide better performance.
