Balanced flue gas fires vent directly through an external wall by means of a horizontal co-axial pipe (one pipe within another). Air is drawn in through the outer pipe, and combustion gases are expelled through the inner pipe. Balanced flue fires do not require an electricity supply.alanced flue gas fires vent directly through an external wall by means of a horizontal co-axial pipe (one pipe within another). Air is drawn in through the outer pipe, and combustion gases are expelled through the inner pipe. Balanced flue fires do not require an electricity supply.
A keyboard which is connected to the computer by use of a USB cable. A keyboard which is connected to the computer by use of a USB cable.
The USB port is a long, flat rectangle with a tab the plug fits into. A USB plug will only fit into a USB port one way, and it will easily slide in. If the mouse doesn't work with either of the USB ports on the keyboard, try each port on the computer. If you have another mouse, plug it in. If that mouse works and your old one doesn't, your old mouse needed to be replaced.