Comparing Toyo Vented Heaters

Most Alaskans do not have a furnace in the basement or a wall furnace.  We have vented indoor furnaces which are used to heat our houses.  They are vented outside and have connections to outdoor fuel tank.  The last exercise I designed for my students to work on compares three models of Toys vented furnaces.  I'd hoped to include another brand but they went out of business a few years ago and left only one.  

Today, we are looking at three different Toyo stoves.  You are looking to replace your current stove with a new one.  The information is given below. 

You will need to do the following calculations.

1. Find the volume using length x width x height.  Remember 1/2 - .5, 3/4 = .75 and 3/8 = 3.75.

2. Calculate the number of days  250 gallons of heating fuel will last for each stove for high, medium, and low. Do the calculations this way.

      a.  Divide 250 by gallons used per hour = number of hours.

      b.  Divide the number of hours from part a  by 24 to give you the number of days.  Round down.

3. If heating fuel costs $5.25 per gallon, how much do you spend every hour the stove runs on high, medium, and low.  

      a. Multiply the number of gallons per hour times $5.25 to find the answer for high medium and low.

Fill out the following table:

Stove	L-750	L-60	L-560
Volume in^3
Number of days of fuel High
Number of days of fuel Medium
Number of days of fuel  Low
Cost per hour high
Cost per hour medium
Cost per hour low
Weight

Please answer these questions using complete sentences.

1. If the area of your house is 1600 square feet, which stove would you you buy and explain why.  

2.  Your grandmother needs a new stove for her house.  Her house has an area of 1200 square feet.  Which one would you suggest she buy and justify your answer.