>Norman & Nancy Werling >... to me, changing by 1 �F in the house is very truly and most >certainly noticeable.
You could be right for that application. You may apply a different Just Noticeable Difference (JND is the scientific term) to your hot water, oven etc. >This�leads me to think that thermostats designed for Celsius >may need to be calibrated in 0.5 �C increments. I see 0.5 degree Celsius intervals in domains that also use Fahrenheit (e.g. my car). If there is no Fahrenheit version, then you often see 1 degree Celsius intervals. I am convinced that the requirement for Fahrenheit intervals defines the Celsius intervals rather than any awareness of the concept of JND. >What is done in Europe? I see room thermostats with intervals of 1 degree Celsius and others with intervals of 0.5 degree Celsius. My home thermostat is a Danfoss rotary dial with infinite settings: http://www.danfoss-randall.co.uk/site/images_library/RET_230L.jpg The defaults for Danfoss appear to be Celsius and 24 hour clock. They have Fahrenheit and 12 hour clock options. The main website is http://www.danfoss.com/ and they have a North American website at: http://www.danfoss.ca/Default.htm
