Does this work with the ACiQ ACIQ-60-HPD / ACIQ-48-ACL-B to easily set up the backup propane heat? On the last installation we used the Honeywell T6 and it took a bit to get the settings adjusted correctly. In Connecticut we had to show that the back up propane was locked out to 20 degrees F.

Yes, the ACiQ TL04-1 Smart Thermostat is compatible with the ACiQ-60-HPD / ACIQ-48-ACL-B system and should allow you to set a backup heat lockout temperature like your required 20 degrees F for propane (auxiliary) heat.

If you have any further questions, please call us and we will be happy to assist you.