my NG company, Columbia Gas, now has a feature that allows you to look on line at your last 24 bills. each bill has a consumption chart on it listing the previous 12 months. So I was able to print out 3 bills and see my last 36 months of usage. I had JAn 03 usage of about 190 ccf. Jan 04 is 40 ccf and Jan 05 was about 45. I installed the stove in fall 2003. My electric for the winter of 02-03 was about $300/month. This month it was $87. so I am using between 1/4 the gass and 1/3 the electricity I did before installing a stove. Can't wait to see what it looks like once I get all the insulation done.