How many Z-Wave devices can the XL824 control?
The XL824 can build a network of up to 230 Z-Wave enabled products on one Trane Home account. Up to eight smart controls of any combination of the 1050, 850, 824, and 624 models are allowed on your Trane Home account for no additional cost, and a monthly subscription charge may apply beyond this number of devices.
From the official Trane XL824 Smart Wi-Fi Thermostat manual, page 2
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