Controlling 2 devices from climate entity

Configuration
1

Integrating my boiler system into HA. Got most everything working, i.e. boiler lockout over 60 degrees F, single device zones working properly. ESPhome based. Master bedroom has 2 zone valves that I’m trying to put onto 2 separate relays as follows:

 - platform: generic_thermostat
    name: Master bedroom
    heater: switch.relay_channel_1
    heater: switch.relay_channel_2
    target_sensor: sensor.lumi_lumi_weather_28344b04_temperature
    min_temp: 62
    max_temp: 75

Works, but only brings on switch.relay_channel_2, not both. If I remove the switch.relay_channel_2, it will bring on switch.relay_channel_1. Does generic thermostat only allow for one device to be controlled?

2

Cancel that, just read docs again. One device per instance.

3

I wonder if climate entities can be grouped?

4

Tried it. Didn’t work right for my situation.