The IsoDoor and IsoDoor HD can be used in any situation. However, these doors do have different advantages that make them more suitable for specific projects.
Most often used in commercial or basic residential applications because of the 1-3/4″ thick slab (similar depth to most doors so standard handles will fit) and lighter weight supported with three heavy duty hinges. The performance of the IsoDoor is consistent in all frequencies. The IsoDoor will provide great performance in any wall assembly with an STC rating of 55 or lower.
Most often used in home theaters, recording studios, and other areas to maintain high STC ratings. The door slab is 2-1/2″ thick and is supported with a continuous piano style hinge that runs the full height of the door. Despite the massive 340 pounds, the smooth operating hinge requires only 1/2 LB of operating force to open and close the door. The IsoDoor HD will provide great performance in any wall assembly with an STC rating of 62 or lower.
Another version of the IsoDoor HD is the IsoDoor HD LF. The specs on the HD LF are very similar to the HD, but the change in core design brings a considerable increase in low frequency isolation.
We strongly recommend alternating the type of door when setting up communicating assemblies. Combining the IsoDoor with the IsoDoor HD or combining the IsoDoor HD with the IsoDoor HD LF will help avoid common resonance issues that occur when two similar materials are installed in the same assembly. Two IsoDoors can be used in the same communicating assembly with a slight change in core design to avoid these resonance issues.