For optimal drying, it is important that more than enough air is blown through the product. Chests with products that are less clean or have a small size will still get enough air in this way. The amount of air is more important than the temperature of the air. Especially at the start of the drying process.
With a drying product, less moisture needs to be drained. Less air is needed. It is then economically sensible to gradually blow less air;
When reducing to 80% air, the recorded power decreases to (0.8)³ = 52%. A fan engine of 2.2kW then consumes only 1.1kW. In this situation 20% less air needs to be heated, which instantly saves heat energy of 20%. The reduction in airflow can eventually go back to 50% with possible interruption using a timer.