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This monitor allows you to track the cost of heating your home, and allows you to compare your home's heating efficiency to similar homes in your area. Is your home's efficiency similar to a Hummer SUV, or more like a fuel-sipping Prius? With this monitor you can now find out, and make better decisions on improving your home and optimizing the way you heat your house. Consider the HeetMeter like the MPG rating on your car, a good way to track efficiency and cost over time.

For example: if you consistently use more fuel than the average home in your area (the gray bars), then you will benefit from simple home improvements like adding insulation to the attic, or upgrading your furnace.

You can track:

A) Behavioral changes, such as changing the temperature on your thermostat, and the impact it has on your heating cost.
B) Home improvement changes, such as adding insulation, before and after they were made, and the impact this has on your heating cost.
C) The fuel level in your tank (for oil heating only)

Using the sliders on the "choose interval" scale, you can zoom in on your time period of interest. For example: if you recently went on vacation and set all of your home's thermostats to 55 degrees, you will see on the graph that you used significantly less fuel compared to the average home during the days you were gone.

Similarly, if you recently did weatherization work on your house (insulation, new furnace, sealing cracks, etc...), you will see the impact of those changes before and after the work was completed.

Please use the update button to introduce the local fuel price and (for oil and propane systems) the fuel amount in the tank. For precise daily usage, you can move the mouse over the graph.

For payback calculations on home improvement work:

1. Take the difference in average HHI from the 7 days before the work was done, vs. the average HHI from the 7 days after the work was done
2. Multiply the number from step 1 with the square footage of the home
3. Multiply the number from step 2 with the local heating degree days per year (available at http://www.degreedays.net/). This tells you how many BTU you will save per year, as a result of your home improvement efforts.
4. Multiply the number from step 3 (the BTU saved per year) by the price of the fuel per BTU.
The average cost of fuel, per BTU, is available here: www.eia.gov/neic/experts/heatcalc.xls
As of March 2014, it is: (fuel oil: $28.31 per million BTU) (propane: $29.35 per million BTU) (natural gas: $11.05 per million BTU)
5. The number in step 4 is the average dollar-amount savings per year as a result of the home improvement work.

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