Most of them. Just raise the temp 2 degrees, and it will report a different temp then it was reading before you changed it.
Originally Posted by jeff520
A couple minutes later, they will revert back.
Originally Posted by jeff520
I'm glad to have validation that I'm not the only one to have noticed
Now the question for the pros here is there a brand/ type of digital
programmable stat that doesn't lie?
I'm stopping myself from building my own.
I have seen claims of how a great new "Energy Star" stat can save money,
and wonder why. The only way I could see before that it could was if it
had a greater hysteris / allowed more variation. But now I see by directly
lying it can gain even greater efficiency!
I guess it should not be a surprise to me that again the fundamental
dishonesty of our current society rears its ugly head.
A couple of months ago I went bezerk when a facilities guy told us that
we would be happier with small. lower, noisier cubicles in our new building
than we have now. Somehow there is this idea that if you sugar coat
something enough it will sound good, even if it is bad for you.
A digital stat, will always have interference from its own heat generating circuits.
A remote sensor won't.
My older (6 years) Chronotherm IV does not have an installer adjustment
Originally Posted by a0128958
for aggressiveness. You're saying any new Honeywell would? I don't
know if its against forum rules, but could you recommend a specific
stat that is adjustable for "agressiveness". Actually ideally want to
be agressive in recovery, and even have some overshoot, but after
that I'd like to try and force the cycles to be longer.
Honeywell TH5000, 6000, 8000 series, and IAQ stat all have it.
Let me make sure I understand
Aggressiveness is a separate adjustment that will
allow me to speed up the recovery even if it overshoots
a bit? Increasing aggressiveness will not cause short
cycling when "at crusing altitude"?
Aggressive won't make it recover quicker.
It will just over heat, or cool depending which one you set to more aggressive.
It gives it a slightly wider spread between on and off temp.
Originally Posted by bobRitchie
Your gas gauge and speedometer are lying to you, too.
I have three home digital thermometers, two with outside remotes. I can put them all together, including remotes, and guess what? No two of the five readouts have the same temperature.
A man with one clock knows what time it is. A man with two is unsure.
So it basically adds some hysterisis.
Which is a good thing to try and get longer
But what's got me mad with my current thermostat
is that its trying to sneak up on the final temperature
in recovery, so much that it takes hours to really
get there. And its saying its there when its still
a couple degrees away.
I do think a multiple sensor in different room approach
might help. But I'd have to cut a bunch of holes in
Why, are both your basement, and attic finnished.
Disable Adaptive recovery, if its enabled.
No neither are.
But I assume the sensors should be 4-5 feet from the floor. I
don't think the ceiling would be a good place for the sensors?
Or would it? If the ceilings a good place for sensors it would
be very easy.
So I need to cut holes to get the wires up from the crawlspace
into the wall cavity. Or down from the attic.
The ceiling is a terrible place for a sensor for temp control.
Any good contractor can get wires to the bedrooms.
What bothers me is not that instruments give different
readings, and need calculation, but the modern stats
have been programmed to lie. They "know" what the
temperature, but report something different.
That's what caused HAL to go crazy and murder the
astronauts in 2001. ( Being programmed to lie. )
I made a lot of trouble at IBM years ago trying to correlate
3 different groups measurements of transistor parameters.
The three different methods gave significantly different
results on the same transistor. All three were happy until
I suggested we compare ... But that wasn't a case of
delibrately lies, just a difficult to do high frequency measurements.
Actually my gas gauge lies like mad. I cruise for 100 miles on full,
but when it hits 1/4 you'd better find a gas station fast.