If you have a shopping complex or office then you can insulate it with commercial insulation blower equipment for sale. When you use a cool insulation machine during summer months then you can make the walls proof from entrance of hot air. If you want to insulate closed walls then you can use devices that work on the technology of blowing insulation method. Such machines blow and forces insulation materials into the walls. Today you can make use of many insulation materials like fiber glass and cellulose.