most work that way...
but what could improve is variable heat source where most dryers operate on a simple on/off and that will cause some overshoot which is a waste of energy.
adding an arduino also allows for custom cycles. one of my fav's will be a cycle that targets on humidity but use lower temps, this will of course result in a longer cycle but will save on the bill. of course you have to judge time used against heat used... why i included a current sensor so that electricity used can be messured...
again its mostly stitching code together that are my biggest issue in this project.