Energy Saving Installation
You can take some simple steps to ensure minimal heat loss during the drying process, which will pay nice dividends by reducing energy costs. See Modern vs Old Dryers
Manufacturers do not always follow the same rules. It is up to you to ensure that the hoppers you buy have at least 2" thick insulation sandwiched between the walls of:
It is not necessary to have insulation above the normal material level in the hopper because that is where cooler material enters the hopper and air is returning to the dryer.
Proper application of insulation to the following dryer components can also reduce heat loss.
Do not insulate the hose returning air from the top of the hopper to the dryer.
Placement of Process Heater
Tighten Hose Connections