1 Breakages are less as the boards are much tougher and have fibers reinforcing in them. 2  they damage less easy from general wear and tear in everyday use in a home or office. 3  It offers slightly better acoustics than standard board.  It is a superior product in case of fire.
It is normal for the solenoid to make noise, it clicks when the valve is turned on or off. It also is normal for a very soft buzzing sound to be heard when the valve is activated, but you should not be able to hear it unless you put your ear near it. If you can easily hear it buzzing, that is not normal.
i pulled over fearing that i a valve train issue. i noticed that the noise didn't increase when the rpm was increased, so i popped the hood and noticed that the Purge Control Solenoid valve (next to brake booster) was clicking extremely loud. i touched the solenoid and i could feel the pulses from the solenoid.