I don't think I'd want to put it in the duct work although it would work fine. Keeping it in your house, like under your bed, will yield the same results and in about the same amount of time. You can only speed up the process just so much and IMO slow curing is the secret to good bow wood.
If you need to get one to work on you can take it down to floor tiller stage and it will dry in a month or two, depending on the wood you are using.