Humidifier - warm or cool mist ?

[doctapayne]

I have an Envirocare Hygrometer/Thermometer ($10.95 at Home Depot in the humidifer department). I did the calibration using a 12 x 12 Ziploc Freezer bag, a table spoon of salt and some water. I set it up at about 8pm last night and at 6:30am this morning it read 74%...... So if the test is accurate it reads 1% lower than what it should.

Dr. P