I have a Harman Accentra Insert with OAK installed. Should I feel a draft from below the stove? I started to notice more noise (air movement) when the combustion blower turned on. As I investigated, I felt a draft pulling air in from under the stove. The more it ran, the more I noticed. Should there be any significant air movement being pulled in from the front of the stove with an OAK? Thanks.