ERV Wall Timer Control for Ultimate Air ER80M

A homeowner posted a question on a building science forum asking about a wall timer control for an Ultimate Air ER80M, a type of energy recovery ventilator (ERV). An ERV brings fresh air into a house while recovering heat or coolness from the air being exhausted, and a wall timer lets you turn the unit on or off, or run it for a set period. Ultimate Air, the company that made this ERV, is no longer in business, which means the original replacement parts and controls are hard to find.

The poster specifically wanted to know where to find a new timer that uses the same CAT5-style plug the original used, or whether a compatible wall switch could be installed in its place if a direct replacement isn't available. At the time of posting, no answers had been given yet.

If you have an older ERV or similar ventilation system from a manufacturer that has since closed, this is a reminder that control parts can become hard to source over time. It may be worth checking whether your system's manufacturer is still active and whether replacement controls or compatible third-party parts exist, especially if you're relying on a wall timer to manage when the unit runs. For now, this particular question remains open, with no confirmed solution yet posted for finding or retrofitting a timer for this model.