A:Answer Hi, Gerry.
Thank you for your question.
We recommend using the factory default setting “4”, however, please adjust the temperature based on your needs and environmental factors.
Hope this helps.
Should you have any additional questions feel free to contact us at 888 203 1389. Our Customer Care Team is available Monday through Friday from 8am-8pm EST and Saturday from 9am-6pm EST.
Regards-Derrick