A field installable device for a conventional heating and air conditioning system is provided which operates {HEAD ~ a blower fan} in conjunction with {TAIL ~ a standard thermostat} 
A field installable device for a conventional heating and air conditioning system is provided which operates { HEAD ~ a blower fan } in conjunction with { TAIL ~ a standard thermostat }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL