@John-T Justis - that makes perfect sense! Thank you - just wish I could have found it on the Kasa site. Thanks again. One KH100 kit and one KH100 TRV are now on my Christmas list!

Can someone explain to me why the KE100 TRVs need the KH100 hub? All my other Kasa plugs and bulbs just work directly through WiFi, so why can't the TRVs? I think the hub has a limited range which is...