Thermostat Deadband Rule of Thumb?

[Jonathan]

Is there a rule of thumb in choosing thermostat's deadband range. I
am using Totaline's definition of deadband (which is the difference
between the set point and when the heating (or cooling) goes on. If
the heating mode set point is 70 and the deadband is 2, the heat will
go on at 68 and turn off at 70. If in cooling mode, the cooling would
go on at 72 and turn off at 70.

I used to have it set at 1 degree and now have it at 2 degrees as my
furnace this was cycling on and off this past cold winter in the
northeast.

My friend just had a new thermostat installed in PA and the contractor
set his deadband to 1 degree.

I'm just curious if there is a rule of thumb or some general cost
saving formula based on the deadband.

Jonathan

[CBHVAC]

"Jonathan" <arc...@bbsti.com> wrote in message
news:c81021ad.04062...@posting.google.com...

Deadband is that....deadband where the stat basically ignores what you have
it at, till its time.

Anticipation is what you need to set, and Totaline stats basically, suck ass
anyway.

[Richard J Kinch]

Jonathan writes:

> I'm just curious if there is a rule of thumb or some general cost
> saving formula based on the deadband.

It all depends on the load vs the source and the frequency you wnat cycles.
Load changes with seasons, day/night, weather, etc. That's why a better
thermostat lets you adjust the hysteresis. Your 1 or 2 degrees is typical.

[m Ransley]

Larger swings are easier on the equipment, short cycles wear out
components faster and give less efficiency as start up is not efficient
till it is warmed up- heat mode or cooled down AC mode.
It is really a matter of comfort. Some people want constant temp some
dont mind a 4 degree spread . Set it to where it swings to much then
back off trying to keep longer cycles.
Short 10 - 15 minute cycles are not the best for HVAC equipment