CBHvac wrote:
"Steve Stone" wrote in message
...
Don't most stats have a plus or minus 3 degrees or so in latitude in when
they turn off or on ?
They do.
There is a reason for this, and a good Honeywell mercury switch stat, can be
better than a Chronotherm model when it comes to comfort.
Its called a dead band, and since MOST people can not actually feel the 3F
difference in temps, you never know.
Personally, the 1F deadband on the digitals is a misleading thing. Some have
been suckered into the hype, that its better, but depending on the system,
it can actually be more than that. You figure in the built in time delay on
some, (up to 5 min) and then, if its a heat pump for example, the 5 min
delay on the defrost board for start, and some homes can drop a couple more
degrees on a harsh day in that time..so....its cycled and thrown the
adaptive recovery into a tizzy.
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"barry martin" wrote in message
news:1609755909.6110.77.2326292.1433022511.RIMEGat ...
J J:
JJ we have a honeywell programmable thermostat for a water-based
heating
JJ system.
snip
JJ what on earth could possibly make this thermostat turn the heating
on
when
JJ it's set at 71 and the temp reads 73?
It's going to become pretty obvious I don't know a thing about water-
based heating systems but I'll say it anyway. Any possibility it's
the wrong type of thermostat or it's set to 'cool' instead of 'heat'?
-
¯ barry.martinþATþthesafebbs.zeppole.com ®
* All must be held accountable, but don't quote me on that.
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I bought our digital to control an electric furnace and it
has now controlled our gas furnace for the past 2 years. It
facinated me, so I've watched it closely and often hung both
regular and other digital thermometer right next to it to
check temperatures. As I said in an earlier post, it
doesn't vary more than a degree and the difference in
comfort, both for heat and cooling is amazing. May be one
of a kind , but that's my experience.