My husband and I purchased our VC Montpelier insert last year in October. At the time, I was unaware that they had extended the tax credit for efficient wood burning stoves. Now that I know, I'm planning on filing an amended tax return to take advantage of the $300 credit for 2012. However, the credit clearly states that only stoves with an efficiency rating of >75% are eligible for the credit. I could not find any information on VC's website about the rating for this insert so I looked for the paperwork from when I had it installed. The energy guide tag that came with the user manual has an arrow on the "efficiency" column that spans between ~59%-65% with an asterisk next to it. Under the asterisk it says "NOT TESTED FOR EFFICIENCY - The value indicated is for similar non-catalytic wood heaters". I searched the forums and it seems that others have taken the tax credit for the VC Montpelier, but without a definite efficiency rating to go by, how do I prove that it's eligible in the event of an audit? Sorry if this question has been asked before. Thanks in advance for all your help!