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' = standards.
ATTN: Paul you got something like this available? (cross-platform / cross-browser)
peace, G7W