Question 285120: Kay wants to buy a new fireplace insert that will burn gas instead of wood. She normally uses two cords of wood winter. Wood costs $250/cord.She is interested in knowing how much she will save if she burns gas in the fireplace insert.Gas costs $0.70 per therm. One therm is 100,000 BTU. The fireplace insert burns 33,000 BTU per hour. Kay figures she will burn the fireplace 5 hours per day for 120 days. How much will she save in one winter if she burns gas instead of wood?
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! 250*2 for the winter=$500 for the winter.
But what does the fireplace insert cost including purchase delivery, installation and maintenance?
You work backwards starting with what you know and working towards the amount saved.
5*120=600 hours
33,000*600=bTU's per hour=19,000,000 btu's
190*100,000
190 therms*.70 per therm
$133
500-133=367 saved
Solar energy is cheap but the initial cost is very high. Is it he same with the insert?
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