Is there a cure for a Fogged Glass Fireplace?Author: Pacific Northwest Inspections Group, LLC Date: 31-Oct-2017. Category: Heating Cooling HVAC Add to Favorites
There is always moisture in the air. This moisture is measured as a percentage of the total amount that the air will hold at a specific temperature, which is known as relative humidity. There is more moisture in warmer air and less moisture in cooler air. When invisible water vapor completely saturates the air and the vapor starts to become dew or visible water, this is known as the dew point. When the dew point is high, the air feels damp and wet, and the relative humidity is high. When the outside air temperature drops below the dew point, rain or fog appears. When the temperature of the glass on the front of the fireplace inside the home drops below the dew point of the inside air, visible moisture forms on the glass. The combination of a cool glass surface and a high level of moisture in the air triggers the condensation process. There can be increased condensation when there is more moisture in the air and/or when the surface on the glass of the fireplace becomes colder. Once the fireplace heats up, the fog or condensation will evaporate in a short period of time.
As soon as the glass warms up, the condensate disappears… but over time, this repeated exposure to condensation can be enough to permanently etch the glass. Once this happens, the only repair is to have the glass replaced. Replacement glass panels for gas fireplaces range from $200 – $500. Contact your local Fireplace and Hearth stores for pricing based on your model.See link below for a specially formulated fireplace glass cleaner, removes white glass fogging. So before you replace your glass try a White Off cleaner.