1. Evaporative air coolers having large capacity and airflow;
2. Pipelines lead fresh and cool air into a workshop;
3. Diffuse shutters: Distributing fresh and cool air into a workshop;
4. Supports and machine platforms;
5. Circulative tanks;
6. Water pumps: Supplying water for  evaporative air coolers;
7. Electric box: Controlling equipments of the system;
8. Electric equipments and material.

Evaporative air coolers are installed steady arrangement on all space of a workshop ( making fresh and cool air for all space of the workshop) or only installed to concentrate on parts of the workshop where employees do their works (making fresh and cool air for parts of the workshop). As a result, this system saves investment expenses and electric consumption, but it still makes clear and cool working environment.

When the system of evaporative air coolers operate, water will evaporate into air to decrease air temperature partially, the rest of water return to continue a new circulation, simultaneously, volume of water is also supplied additionally to compensate for partial water evaporating. That is the circulation of water in this system, it helps us to save water and other expenses. Moreover, because volume of water is changed regularly, it helps the system to operate more effective and air flow blowing into the workshop to become cleaner and cooler.

The most salient feature of the system of evaporative air coolers making positive pressure:

• Low expenses of investment and operation: Its investment expenses and electric consumption is correlatively equal 30% and 10% to the system of air conditioners.
• High effect: Air through the coolers will be cleansed and made cool to become abundant oxygen. As a result, the coolers will make ideal environment to increase productivity and guarantee health for employees.

1. Exhaust Fans have large capacity and airflow;
2. Frames of evaporative cooling pads including:

• Evaporative cooling pads, called Cooling Pad;
• Water distribution pads;
• Gutters;
• Meshes protecting Cooling Pad from dust, insect  (option: yes or no)

3. PVC pipes supply water to frames of evaporative cooling pads, PVC pipes take back water from frames of evaporative cooling pads to circulative tanks, and water distribution PVC pipes;
4. Water pumps ;
5. Circulative tanks;
6. Electric box;
7. Electric equipments and material;
8. PVC sheets adjusting air flow inside a workshop to positions needing to make fresh and cool air (option: yes or no) .

The conditions of a workshop to possibly applying evaporative cooling system making negative pressure include: 

– The workshop must be tight;

– In condition the workshop is not tight, it is necessary to consolidate sites not being tight before installing the system such as:surrounding wall, ceiling, roof, heaven gate, slits, windows, doors,…

– When the system operating, the workshop must be closed tight.

The chart and principled operation of evaporative cooling system making negative pressure:Evaporative cooling system making negative pressure operates under principle to make negative pressure in a workshop by the following way: At a gable of the workshop, exhaust fan hasing large air flow is installed to exhaust  total hot and poluted air and industrial dust inside the workshop to eliminate outside.

At the opposite gable of the workshop, the system of frames of evaporative cooling pads (including evaporative cooling pads and water distribution pads with a standard size put together and surrounded by stainless steel gutters) is installed. These pads are supplied water regularly by water pump by the way watering regularly on the surface of water distribution pads then wetting all the surface of evaporative cooling pads. After flowing through evaporative cooling pads, water will falls into the gutters and through recovering PVC pipes to return the tank to join a new circulation. Because of the different pressure between inside and outside the workshop, hot and dry air will be exhausted through evaporative cooling pads exchanging temperature with water to become fresh and cool air  and suitable humidity. As a result, air temperature inside the workshop is decreased.