Horizon Services, Inc. -- the leading plumbing, heating and air conditioning services company in Delaware (Wilmington, New Castle County, Kent County), Southeastern Pennsylvania (Chester County, Delaware County), and Maryland (cecil County) -- presents an instructional video series on how to use the Honeywell VisionPRO IAQ programmable thermostat. Part 2 of this series covers "System and Fan Settings". Horizon Services has been in business for 20 years and is ready to meet all of your HVAC repair, maintenanace, installation and replacement needs. Choose us for on-time service, up-front pricing and a job done right and clean the first time...GUARANTEED! Visit our website at www.horizonservicesinc.com.