This usually happens about 2 years after her breasts start to develop. The menstrual (say: MEN-strul) period, or monthly cycle, is when blood is released through the vagina. That may sound alarming, but it's normal and it signals that a girl is growing up and her body is preparing so that she can have a baby someday.
1 Vent-free gas fireplace (no chimney required) with installation: The standard cost for a vent-free, or ventless, gas fireplace is approximately $800-$2,000 installed. 2  This does not include the cost of any gas-line work needed.3  Installation costs for a top-vented gas fireplace: Approximately $300 to $1,200. This does not include the cost of any gas-line work needed. 2  Installation costs for a top-vented gas fireplace: Approximately $300 to $1,200. 3  Direct vent gas fireplace installations: These are more expensive and can cost up to $5,000.
Most of the heat that is produced will go up the chimney in this case. For the equivalent in a gas insert or gas fireplace, a large could use about 40,000 BTU/hour and in this case would cost about $0.40/hour to operate for natural gas and about $1.31/hour for propane.