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+comfort
+ expense reduction
+ permanent optimal temperature regardless of season or weather
+ preventing energy losses
+ improving the ease of HVAC system maintenance
+ faster repairs due to failure detection
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+ controller with sufficient number of I/Os
+ suitable control software
+ temperature and CO2 sensors
+ thermoelectric radiator valves
+ external relays for AC and fan switching
+ magnetic contacts on windows and doors
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+ place temperature and CO2 sensors in all rooms
+ set controller to switch heating or air conditioning according to data from sensors
+ set controller to disable heating or AC in unused rooms or rooms with open windows/doors
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