These houses were built for someone who is just starting to raise Orchard Mason Bees. Built with a release chamber built-in and were designed to hold about 30 bees and about 45 nesting chambers. They are built out of a hardwood Birch Laminate and should last for many years if protected from the rain.
I thoroughly enjoyed your informative YouTube videos.
Your New Bee House Design on YouTube should be watched for those looking for the perfect bee house. I got two of those and was impressed with how easy they are to use and care for.
I put them on top of a PVC pipe and they worked like a charm.