The only way to know relative humidity is to get a hydrometer.
I've had guns in my safe for close to 2 years and have not had a problem using nothing. This spring I bought a 18" Goldenrod heater, forgot the watts but think it is 1500. Put a hunmidity and temperature gage in there and the humidity during 90 degree temperature days was 51% and the temperature inside was 68 degrees F. The safe is in the basement, where the temperature doesn't get above 73 deg. F in summer when it is 90+ degrees outside, and below 52 deg.F when the temperature is 20 deg. outside. That is for Pennsylvania.
I stand corrected about the wattage, it is 18 watts and the temperature rating is 150 deg. F.
In wood working here, measuring moisture using my Mini Lingomat meter, the wood when stabilized in the environment it is being used at, in house, is between 6-8%.
Last edited by JDW; 10/22/10 07:16 AM.
