Why did Aspen C3 lose EPA certification?

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mycelianhollow

New Member
Dec 28, 2024
12
Northern Maryland
Hi all,

In doing my taxes this year, I was unpleasantly surprised to find that the Aspen C3 I installed last year (2025) doesn't qualify for the tax credit. Aspen C3s apparently previously were 75% HHV (here's the 2019 EPA test report saying that), but somewhere along the way dropped to 71% HHV, which does not qualify for the tax incentive. I then found certifications (1, 2) from Vermont Castings' parent company that appear to indicate that the Aspen C3 is no longer a "qualified energy property" for that tax incentive as of June 2024. The second linked certificate in particular shows the new date that the tax credit ends (2025, instead of 2032) and the Aspen C3 is no longer listed.

Does anyone know what happened to the Aspen C3? I know there was an issue with them needing to get re-tested and they were unavailable for a while (learned that from other threads on this forum), but I thought that was resolved and their certification was re-confirmed?

Thanks in advance~