Can two Zwave and ZMatter networks co-exist?

[johnnyt]

I want to separate my workload (~1400 programs, 751 total nodes, 328 Zwave, 179 Insteon) from one eISY to two eISY's, one for lighting, one for HVAC. Lighting is mostly Insteon with some zwave, while HVAC is mostly Zwave with some Insteon. I don't have any ZMatter or Zigbee at this point but may want to add some in the future.

While I've seen Insteon and Zwave co-exist with a couple of test devices using a separate Polisy I have for testing and as a backup in case my eISY fails, I'm wondering if it will scale, particularly for Zwave and Zmatter/Zigbee when devices are spread out further away from their respective controllers, and particularly if there are only a few devices on the 2nd controller

For Insteon, I believe all devices repeat all insteon signals no matter which controller/PLM is sending/receiving, meaning both Insteon networks will help each other. (Please correct me if I'm wrong)

- Can the same be said about Zwave? As I understand it, I would end up with two separate Zwave networks that will NOT help each other.

- What about with Zigbee/ZMatter?

Also, worse than not helping each other if that's the case, could/will devices from separate networks actually interfere with each other?

Any info would be appreciated.

[lilyoyo1]

1 hour ago, johnnyt said:

I want to separate my workload (~1400 programs, 751 total nodes, 328 Zwave, 179 Insteon) from one eISY to two eISY's, one for lighting, one for HVAC. Lighting is mostly Insteon with some zwave, while HVAC is mostly Zwave with some Insteon. I don't have any ZMatter or Zigbee at this point but may want to add some in the future.

While I've seen Insteon and Zwave co-exist with a couple of test devices using a separate Polisy I have for testing and as a backup in case my eISY fails, I'm wondering if it will scale, particularly for Zwave and Zmatter/Zigbee when devices are spread out further away from their respective controllers, and particularly if there are only a few devices on the 2nd controller

For Insteon, I believe all devices repeat all insteon signals no matter which controller/PLM is sending/receiving, meaning both Insteon networks will help each other. (Please correct me if I'm wrong)

- Can the same be said about Zwave? As I understand it, I would end up with two separate Zwave networks that will NOT help each other.

- What about with Zigbee/ZMatter?

Also, worse than not helping each other if that's the case, could/will devices from separate networks actually interfere with each other?

Any info would be appreciated.

Both zwave and zigbee uses routing to reach devices within their mesh network. Splitting up devices can impact your network if things arent done properly. I doubt the 2 networks would interfere with each other since they wouldn't know anything about one another. 

[johnnyt]

Thanks for that bit of info. 

Can anyone confirm my understand that all insteon signals from both insteon networks will be repeated for all to hear?

Also, do zwave repeaters (built solely for that) repeat signals from both zwave networks or just the ones they see when initially powered on?

Finally, anyone actually have experience with this?