Mirror Defogger 18x25 Rect (FFM-1825)

The defogging is concentrated in the area of the heating element, but may spread out as the mirror warms up over time. There are too many variable atmospheric conditions that make it impossible to quote a fixed distance of heat spread away from the element. That is why the defogger must be placed in the area of the mirror that requires defogging.

None - it is peel and stick (comes with an adhesive backing).

It is 1.18“ (1-⅜“ or 30.1mm) square and .21“ (¼“ or 5.4mm) thick.

As long as the wood is not glued or attached with any form of mastic to the defogger, yes.

The main electrical line feeding the Mirror Defogger must incorporate a GFCI for North America.

Yes.

Nothing can be put on the back of the defogger.

Installing a mirror defogger is a simple process:

• Clean the back of the mirror thoroughly.
• Peel off the adhesive backing from the defogger pad.
• Press the pad firmly onto the center of the mirror's back.
• Have an electrician wire the lead wires into the bathroom's lighting circuit or a dedicated switch.

Mirror defoggers are extremely energy-efficient, typically using about the same amount of electricity as a standard light bulb. For example, a medium-sized defogger might consume only 25 to 50 watts. Since they are usually wired to the light switch, they only draw power while the bathroom light is on.