Holmes - Indoor Thermometer & Humidity Level Reader HHG-150

THE OPTIMAL COMFORT ZONE Humidity - the green section indicates the optimal comfort zone for humidity, between 40% and 50% Temperature - the white stripes in the green circle indicate the optimal temperature A relative humidity level of 45% to 50% at temperatures from 68 degreesF to 72 degreesF is considered best (when the two needles are pointing at each other), however you will need to determine the most comfortable range for your own personal needs