Really some out standing information here. Don ----- Original Message ----- From: chiliblindman To: [email protected] Sent: Friday, April 27, 2007 9:44 AM Subject: [BlindHandyMan] One or two stage units
Furnaces come in two stage and two speed heat ratings. Boilers call it hi and low fire usually. It can be automatic change over by a thermostat in the water jacket that reads the hot water temp, an outdoor therm that switches as the temps outside get colder. In the case of electric, a sensor in the duct detects the heated air temp of a warm air system and fires up more electric heat if the temp drops below a set point. In the case of two stage, additional gas, electric, whatever is added to the operation. In the case of two speed, the unit stops and re-starts as the fan continues to run the entire time. In the case of a two speed or two stage variable speed, the unit will transition from one speed and volume to the other and back. Multiple speed units always start in low output and will return to low output again before turning off normally. The idea behind two speed and two stage units is extremely even temps are maintained for comfortability and max savings on operating costs. Turning the thermostat off will defeat any purpose in having even heat or cool since the wall temp it is mounted to needs to be even also for proper operation. These new thermostats are accurate to less than one half degree, where as the older styles of thermostats are only designed for a min of a 3 degree swing. .....................bob [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] To listen to the show archives go to link http://acbradio.org/handyman.html or ftp://ftp.acbradio.org/acbradio-archives/handyman/ The Pod Cast address for the Blind Handy Man Show is. http://www.acbradio.org/news/xml/podcast.php?pgm=saturday The Pod Cast address for the Cooking In The Dark Show is. http://www.gcast.com/u/cookingindark/main.xml Visit The Blind Handy Man Files Page To Review Contributions From Various List Members At The Following address: http://www.jaws-users.com/handyman/ Visit the new archives page at the following address http://www.mail-archive.com/[email protected]/ For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/blindhandyman/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/blindhandyman/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
