Noob here and attempting to learn. I would not know what an OAK looks like if it hit me over the head. About to purchase the Enviro M55 cast and now attempting to learn installation techniques. I will have a professional do the installation, but I want to learn so I know the installer is doing a good job. I will more than likely buy an OAK because of all the chatter on this site about the kit and how it effects air quality inside the home.
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![[Hearth.com] In this video, did they install an OAK? [Hearth.com] In this video, did they install an OAK?](https://www.hearth.com/talk/data/attachments/151/151980-85470b7c980406b9335269543e855203.jpg?hash=0X9vmUfycj)
![[Hearth.com] In this video, did they install an OAK? [Hearth.com] In this video, did they install an OAK?](https://www.hearth.com/talk/data/attachments/151/151981-8a19f0dd6837905d19fe9a4104751fcb.jpg?hash=ALmPup_MSN)
![[Hearth.com] In this video, did they install an OAK? [Hearth.com] In this video, did they install an OAK?](https://www.hearth.com/talk/data/attachments/151/151982-b5ae7f9fd542e9b3daa897dfa1fcebfe.jpg?hash=ECyEcnOwLt)
![[Hearth.com] In this video, did they install an OAK? [Hearth.com] In this video, did they install an OAK?](https://www.hearth.com/talk/data/attachments/151/151983-6b40844bb6385beec645292357397e53.jpg?hash=jIQxH43dPn)