Well it got a little cold yesterday so decided to have my first fire in the new NC-30. The inside is a cavern! Just had a small break in fire. Hearth is almost done! Just need to trim and put the granite mantle on the top and it'll be complete! I really like the 30, think I'll be loving it in a few weeks when we need it!The hearth is granite on concrete as this is a first floor install. All clearances have been exceeded and the back of the hearth has metal studs on concrete with a 2" air space. I will have to space the granite mantle on the top to allow airflow but it should look good.