Both drop in styles are installed by lowering them into your counter opening. They do not need to be glued or secured, the weight of the unit will hold it in place. Drop in styles are designed to be supported by the lips on all sides of the firebox. Drop in firebox styles have 1.5″ lips. Drop in frame styles have 2.5″ lips. The lips cover most opening imperfections for a clean look.
Drop in firebox styles generally come with approx. 14″ tall box, while drop in frame styles have 12″ channel guides below the rim. The channel guides are the tracks for the grate to travel downwards into the opening. They do not need to reach the bottom of the firebox as 12″ is generally plenty of travel below the rim.
If you still aren’t sure which style you need, contact us.