thank you for all of the replies. I do have electric hot water and electric oven. No electric heaters. I was just shocked when PSEG told me that I used more this feb then last. I just got the insert installed this past September. It seems you all agree that the blower shouldn't make a huge difference. They did up their charges when they took over our old electric company. Thanks for the feedback!
You used more in dollars, or you used more in kWh? It is an important distinction.