AR-EH04U, Wireless Controller

Wireless controller that supports Wind-Free™ functions.  Compatible with NASA and non-NASA systems.   AR-EH04U Provides a lower heating set temperature range compared to AR-EH03U (for supported indoor unit models).  For heating set temperatures below 61°F (16°C) the indoor unit firmware must support this function. Refer to technical bulletin “TB2020-0001 DVM S Extended Heating Set Temperature Range”.