On Thu, 24 Jan 2013 17:32:54 -0600, "ps56k"
wrote:

What with all the various eco topics concerning when and how to run your
heating/cooling,
I have yet to see a home electronic thermostat with the added feature of -
- an elapsed run timer -

My relatively plain jane, 5 yr old Hunter does that. I thank I paid
$50 for it- it has a couple programmable features and flashes me when
the elapsed time reaches a preset. [I use 75 hours] Then I know it
is time to change the air filter.


ie - how long has the system run since timer reset ?

This would be great to see if setting the temp higher in summer,
or a little lower in winter actually changes anything
while being able to record the amount of time the furnace or A/C runs...

I take it on faith that it saves a little. The math involved in
figuring all the heating/cooling degree days, traffic in and out,
relative humidity, wind direction, etc would make my head explode.

If the heater/cooler runs less it will save money.

Jim