How to wire a third-party controller to a Vent-axia MEV unit
Connecting a third-party controller to a Vent-axia MEV unit creates confusion over whether the 0-10v ground is safely shared with AC power and how to map existing light and fan switches. This mismatch leaves installers completely lost and unable to finish wiring their ventilation systems.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Looping the 0-10v ground with the neutral
- 2Watching instructional videos
- 3Reading previous Reddit posts
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“I'm looking at building a ventilation system, I want to use a Vent-axia MEV unit which has 0-10v input for fan speed control (3 step) and a controller from Aliexpress which has the wiring in the picture.”source ↗
“I can only assume the 10v Ground is shared with the AC? is this safe / an issue with noise?”source ↗
Where this came up
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