Air washers are versatile appliances that can be used to cool or heat a variety of spaces. They are effective at removing dust, pollen, and other pollutants. We offer a consultation service to help you choose and buy the air washer for your needs in bulk.
What is an Air Washer? An air washer is a device that sprays water vapors in the air to freshen up, humidify, and sometimes cool the air. Air washers can be used as an independent device or as part of another air conditioning unit.
There are two main types of air washers, apartment and industrial, which are offered in horizontal, vertical, front spray, and face-up models, equipped with or without a heating coil. They can be used in most cities of Iran and the Middle East that have dry weather in summer (relative air humidity is less than 40% to 45%).
Air washers can be used in apartments, offices, and especially industrial environments and factories in cities of Tehran, Isfahan, Semnan, Shahrood, Shiraz, Mashhad, Kermanshah, Sanandaj, Hamedan, Arak, Tabriz, Karaj, Qazvin, Sulaymaniyah, Erbil, Mosul, Kirkuk, Aleppo, Ankara, Mazar-e-Sharif, Kabul, etc. to provide cool air in summers.
They can also be used as a heat generator by installing a suitable hot water coil to use the pleasant heat in the cold seasons of the year.
Air washers can be divided into three different types in terms of power and efficiency, type of use, and installation location:
In general, air washers are divided into three classes, which are as follows:
There are two types of air washers based on their usage: industrial and domestic:
Industrial air washers are very similar to domestic or home air washers in terms of their structure and operation, and by spending the least cost and electrical energy, they clean the air from pollution and dust with proper filtration and transfer pleasant and clean air to the units.
In industrial, commercial, and office environments, due to the wider space or high ceilings, a larger volume of the returned air from the building enters the air washer again and mixes with the fresh incoming air.
Therefore, in such cases, industrial air washers with larger dimensions and power are used. Some industrial air washer applications are in industrial sheds, greenhouses, exhibitions, warehouses, universities, department stores, sports halls, etc.
The mechanism and operation of home air washer devices are similar to industrial models, and the only difference is in their dimensions. Home air washers are smaller than industrial models, called apartment or home air washers. These devices are produced in horizontal, vertical, and front-blowing models.
All household air washers can be installed in different places such as balconies or terraces, roofs, and patios in residential buildings and connected to each unit through ducting due to their small space occupation.
It should be noted that home air washers provide the possibility of independent air conditioning of each unit, and by connecting it to the engine room hot water coil or wall package, in addition to the cooling function, it can be used for heating in the cold months of the year.
Of course, air washers need to implement the internal air return channel and use the return air from the indoor environment to provide warm air in the cold months of the year (unlike their summer performance, which must be with 100% fresh air).
Because otherwise, their hot water coil should be calculated and implemented many times stronger so that it can fully warm and direct one hundred percent of the cold air in the environment in the winter season.
In terms of application, there are three main types of air washers:
As its name suggests, the standing air washer is installed in a standing position. This device can be installed in most places, but usually, it is placed on the roof or inside the balcony of the building, and cool air in summer and warm air in winter (with return air duct from inside) is transferred to the units through ducting. They do. Standing air washers are offered in face-up or overhead models with or without heating coils.
Ceiling or under-ceiling air washers are usually installed in the balcony ceiling or inside the false ceiling of the building, and like other types of air washers, they require air ducting to direct and transfer fresh and clean air to the units of all types of residential, office buildings, etc.
The rooftop air washer is a type of standing air washer installed vertically on the roof, and its function is the same as other air washers, using ducting of outgoing air in summer and return and outgoing air in winter.
In cases where it is impossible to access hot water to provide heating by air washers, Econopack air washers can be used. Econopack Air washer is a device that performs like a hot air furnace to provide heating.
In this way, a gas or diesel burner is installed in the device, the resulting flame heats the furnace, and finally, the exhaust air is heated by passing through the combustion chamber of the air washer. There is no need for a spa engine room to heat the spa coil and the exhaust air. It is not an air washer.
An air washer or air cooler can provide cool, fresh air in the summer season, and if a heating coil is placed in the airflow path and the air return channel is implemented from the inside, it will be possible to provide warm air in the winter season as well.
On the other hand, due to the presence of an air filter in the airflow path of the air washer, a large part of the dust, pollution, and allergenic substances in the air are removed and absorbed by the filter.
Therefore, the cool or warm air blown by the air washer is clean and pure. Also, since the water inside the air washer is heated to a great extent and turns into steam, this steam is combined with cool or warm air inside the machine and its relative humidity increases. For this reason, the air washer is a suitable option only for use in areas with dry and semi-arid climates.
In the following, the cooling and heating operation of the air washer is described:
In the summer season, the hot air from the outside environment is sucked into the device by the air washer fan, and by passing through the air filter installed in the device, the filter absorbs a significant part of the dust in the air. Next, this volume of air enters the main chamber of the air washer for cooling.
Reducing the air temperature in the main chamber of the air washer is done by spraying water powder by nozzles or sprinklers and by evaporative cooling. At this stage, in addition to reducing the air temperature, the remaining dust particles and other pollutants in the air are removed from the air by coming in contact with the water powder particles sprayed from the nozzles, and finally, cool and clean air comes out from the air washer.
In winter, air washers provide warm air in the building by passing the return channel air from inside (along with a percentage of fresh outside air) over the hot water coil built into the device (which is heated by the central engine room boiler or heating package).
In this way, the air inside the air washer device is blown on the surface of the coil containing hot water, and its temperature increases. Meanwhile, the temperature of the hot water in the coil is reduced, and it is returned to the heating package or the hot water boiler of the engine room through the return pipe. Then this hot air enters the ducting by the fan and is blown to the units from there. This cycle, or cycle, flows continuously inside the air washer.
Note that the heating function of the air washer can be implemented in two ways: combined and fully fresh. The full-carpet mode means that all the air required by the device is supplied from the fresh air of the outside environment, But in the combined mode, part of the air required by the device is supplied from the air inside the unit (through the air return channel) and the rest from the outside air.
Some of the purchase orders for air washers are apartment air washers with a capacity of up to 7,000 CFM (equivalent to 11,900 M3/hr) and for use in other cases mentioned above, air washers in classes 4, 6, and 8 with capacities of 7,000 to 100,000 CFM ( (equivalent to 170,000 M3/hr) is welcomed by experts and engineers of projects in the above climatic conditions.
Since the cooling function of air washers is based on the evaporation process of water (like water coolers) and only by supplying 100% fresh air from the outside environment, therefore, air washers should not be expected to produce dry cooling like condensation or absorption cooling systems or split ducts and splits.
Recently, some air washer manufacturers, to reduce the temperature of the water and consequently reduce the temperature of the cold air coming out of the air washer, based on the customer's order, calculated and installed an additional compression refrigeration system in order to reduce the temperature of the spray water entering the main chamber of the air washer, which with this method practically they create a combination of condensation and evaporative cooling system, and as a result, while improving the cooling of the air washer, the amount of moisture added to the air coming out of the device is also reduced.
Air washers are placed independently or in interaction with the rest of the building's air conditioning system and include:
Air washers may have countless benefits and advantages compared to other ACs, but most of them are those we have listed here:
There are, of course, many factors to consider when choosing an air washer; some are personal preferences, and some other technical requirements. But the following are the most important factors you do not want to miss:
Note: Refer to the explanations of the air ducts and vents in the air conditioning equipment section of the DamaTajhiz website.
Just like everything else, air washers come with a few disadvantages. Some of them are as follows:
Here are the four most important technical terms we think you should know about:
Dehumidification in the air washers is possible when the temperature of the sprayed water is lower than that of the incoming humid air. The colder the sprayed water is, the more dehumidifying is done, and the cooler and fresher the air becomes.
Corrosion control is crucial in any metal system that works with water. Carbon dioxide, sulfur dioxide, and other corrosive gases can cause serious problems when dissolved in water. All of these materials form a mild and dilute acid that easily attacks unprotected surfaces and causes corrosion, and one of its characteristics is a pressure drop in the nozzle.
To correct this situation, they create an anti-corrosion coating on the metal surface, which, in this case, increases the pH of the water to about 9. This pH neutralizes surface acids and delays the growth of bacteria in the air washer system.
The oils present in the air vapor are created from the operation of machinery at high speeds. Oil particles cause a malfunction in the system, and oil separators can solve this problem. These materials take the oil from the mud and dirt of the water, bring it to the water's surface, and take it out of the system with an overflow. If oil remains in the system, the system reaches a point where it is forced to shut down.
The air washer gives air to the area that people breathe, so the air must be clean and free of odor and pollution. Air washers quickly become slimy and smelly. To solve this problem, they use low-smelling oxidizers such as hydrogen peroxide and bromine, which are injected into the air washer system twice weekly.
Extra: Evaporation systems such as Air washers and Zent units are great for hot and dry areas. These systems are more affordable than compression refrigeration systems (ductless or ducted ACs and chillers), especially for large buildings with high ceilings, such as halls, mosques, sheds, loft houses, etc. The cost of electricity consumed by these devices is less than a quarter of ducted/ductless split air conditioners and chillers.
The first step to buying an air washer should be to pay attention to the cooling capacity and the dimensions of the installation location.
Because air washers are produced and supplied in different types with different cooling and ventilation capacities, therefore, you should mind the size and use of your desired environment before buying an air washer to make the right choice in the aeration capacity, model, and price of the air washer you need.
After that, things like energy consumption, features, brand, and benefits of the relevant air washer should be examined.
On the DamaTajhiz HVAC website, technical information of dozens of models of air washers from different reliable brands with original warranties has been presented for you to enjoy the good feeling of optimal and smart shopping for wholesale purchase.
The price of air washers can vary greatly based on the type of capacity and brand. All the air washers presented on DamaTajhiz HVAC Group's website have product IDs, reasonable prices, and discounts, which are already included.
Also note that in the specialized HVAC group of Damatajhiz, all the DamaTajhiz air washers are only sold in bulk. Therefore, if you want to wholesale any of these products, contact us.
Q: How many degrees can the air washer reduce the air temperature?
A: Usually, if the capacity of the air washer is chosen correctly and there is no problem in terms of dimensions (according to Dactilator), the implementation of ducting, compliance with the radius of the inner arc of the channel, or the standards of changing the direction in the channels, it can reduce the indoor air temperature to several around 26 degrees Celsius.
Q: Is the air washer the same as the water cooler?
A: No, but the type of cool air supply is similar to the water cooler, using the evaporative cooling method, with the difference that the air washer has a more effective and stronger performance than the water cooler.
Q: How much electricity does the air washer machine consume?
A: The electricity consumption of air washers is generally about 1/5 (one-fifth) of the electricity consumption of condensation refrigeration systems in the desired environment.
Q: Is it possible to adjust the humidity in the air washer system to the desired level?
A: Yes, you can adjust the humidity level of the device as desired by choosing the class of the air washer (class 4, 6, or 8) and then installing the humidistat and steering the device's water pump.
Q: In what places is the air washer suitable for use?
A: Airwasher is suitable for use in apartments, residential, offices, healthcare, schools, halls with high ceilings, workshops, exhibitions, etc., whose relative humidity is less than 40% in summer.
Q: Does the air washer need a chiller?
A: No. If you use an air washer, you have chosen the type of evaporative cooling, and you no longer have to deal with the chiller's compression cooling system.
Q: What type of weather is not suitable for using an air washer?
A: As mentioned earlier, using air washers is not suitable for cooling environments where the air has a relative humidity of more than 45% in summer (such as coastal cities).
Q: Can an air washer be used instead of an air conditioner?
A: If you don't have a compression chiller, you won't need an air conditioner Because the air conditioner works completely like an air washer in terms of heating function (using a hot water coil in the air passage of the device). But the air washer cools the summer air with humidification without needing a chiller, while the air conditioner supplies the summer air by passing through the cold water coil of the chiller (cooling coil).
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