A real look at change in energy consumption

Dear Jeff:

I promised I would let you know how our natural gas usage improved after the sealing and insulating work you did for us in March 2010. The attached chart shows a REAL improvement (except June, and I don't know what that is!) in our usage. If you assume the 12-14 therms used is for cooking and water heating, the rest is the two house furnaces.

Needless to say, we are much warmer in the cold months are are saving significant money on our natural gas bills. Thank you for your wonderful work. We are really enjoying it.

THERMS USED: GAS

* Work Done