An HVAC surge protector is an external device installed at the disconnect box to protect the sensitive inverter boards in your system from power spikes. Modern mini-splits rely on complex electronics that can be fried by a nearby lightning strike or a utility power surge. We highly recommend adding a surge protector to every multi-zone wall mounts installation to safeguard your investment. This is especially true for our Mitsubishi and Cooper&Hunter systems, which feature high-end control modules. A small investment in a surge protector can save you thousands in repair costs down the road. You can find these protective parts in our accessories catalog.