There is 5 Blades Large Industrial Ceiling Fan offered by us that provides a high volume of air at a very low speed. Therefore, they are excellent for large areas. These fans can also help to spread the cool air of the HVAC systems. So, people can use them to assist the air conditioning system. The five blade ceiling fan is that they provide ample air circulation in the room. This enables people to move heat around the space during the winter months or on cool nights and helps keep the room cooler during the warmer months. 5 Blades Large Industrial Ceiling Fan is very effective.