Three things to consider :
First, if the thermostat is behind the computer, then there is a good
chance the hot air from the computer fan and/or monitor are affecting
the thermostat, at least when they are on. Since the thermostat will be
warmed by this, it will seem cooler elsewhere. When the computer is
off, the thermostat will be more accurate.
Second, most, if not all, thermostats allow the temperature to
fluctuate in a range centered on the desired temperature. The reason
for this is mosly a matter of efficiency, as keeping the temperature at
a constant setting would require the heater to go on and off
frequently. This is not only inefficient, it is annoying.
Finally, the outside temperature can affected by other things. In a
still room, warm air will rise, and cold air will sink. The floor will
often be significantly cooler than a thermostat mounted fairly high on
the wall. Also, if the thermostat is mounted on a central wall, this is
frequently more insulated and stable than areas near exterior walls. A
ceiling or other fan can help balance the temperatures, but this will
also increase your energy bill.
Four things, actually. To the below, add humidity level.
We're talking about the differences between "latent" heat
and "sensible" heat.
A quick explanation found online...
Any mixture of air and water vapor contains heat. Part of
that heat is represented by the "sensible temperature" of
the air. (Sensible heat can be measured by a normal
thermometer...one with a dry sensing bulb.) The other part
of the heat in the air is its "latent" heat. Latent heat is
the energy that was used to evaporate the mass of water that
the air now contains. So if the air now contains a great
deal of water vapor, its latent heat is high. Conversely, if
the air is rather dry, its latent heat is low. The sum of
the sensible and latent heat of the air is called its
"enthalpy", sometimes called its "total heat".
In my own home, I've found that 70F at 15% humidity will
feel chilly. 70F at 55% humidity will feel warm and
comfortable. Running a humidifier during a heating season
means that one can set thermostats lower and still feel
We have been officially metric for almost 30 years now, but most
people over 30 still seem to thing in Fahrenheit. I don't
understand it because Celsius makes so much more sense. Water
freezes at 0 and boils at 100. That 0 C makes a big difference in
weather conditions. When it drops below freezing it is cold, so
having a scale that zeroes out at the freezing point makes a lot
of sense. You are quite right about being able to detect a one
degree difference in temperature. One degree C is noticeable
while one degree F is not.
And had multiple units of measurement for the same thing. Units which
are not simply related (as in length: there's feet, inches, yards,
rods, fathoms, angstroms, light years and more), so adding to the
difficulty of obtaining and using measurements.
Metric has ONE unit for each thing, and a set of related prefixes for
large or small multiples of any unit.
Right, it's a distance and it is metric. Last I knew, light traveled at
approximately 3x10^8 m/sec.
A year is roughly 31,536,000 seconds. So light travels
9,460,800,000,000,000 m/year. Simplified, 9.5x10^15
The "second" is a metric unit. The "year" is not.
You can measure the distance light travels in a year, expressed in
metric units. That doesn't make "light years" a metric unit. It is
based on the year, which is not a metric unit.
You can measure the volume (using fluid ounces) of a liter. That
doesn't make the liter non-metric.
I don't know where you are, but weather reports and temperatures
on buildings are all in Fahrenheit. Schools teach metrics as
though it was a foreign language. While whiskey, wine, and soda
are measured being soda are being sold in metric, beer and most
other necessities of life are sold in US measurements. Try to
by lumber by the meter.
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