it's been awhile since I've been in this group.
curious, is there a generic operating cost calculator - heat pump versus
fossil fuel - that allows you to adjust you HP cut-off setting based on
current fuel prices (electric compared against gas/oil/propane)
I found this, but it's an Excel file and formulated against a particular
brand of equipment; also the efficiencies are a bit low to todays'
maybe I'll just have to tweak it and rerite it for WWW access with mySQL
database for table storage, but I'm really too busy (maybe too lazy) to
attempt it now - many customers of heat pump with gas furnace installations
are requesting this "tool" especially those purchasing Carrier's Infinity
you got something like this available? (cross-platform / cross-browser)
Might want to become a member and check http://www.serviceroundtable.com/
They have all kinds of stuff in their archives.