A thermostat is a device that cools the house during hot
periods of the day and warms the house during cold periods,
by activating a heating and cooling system, so that the
temperature of the house remains at a desired setting. You
don't have to feel too hot or too cold. But it is up to you
to decide the degree of hotness or coldness that you are
· Development of the Thermostat.
The first invention used a bimetallic strip; two pieces of
metal riveted together. The bimetallic strip acted as a
connector in an electrical circuit. When the room heated up,
the strip would expand to break the circuit and return to
complete the circuit when the room cooled. However metal
takes a long time to heat and so manufacturers started using
gas as a connector or bridge. When the room hits up the gas
expands and breaks the circuit, as the room cools, the gas
contracts and the metal conductors are pressed back together
to complete the connection again. Human beings are always in
pursuit of the better, the more comfortable and the greener;
one that conserves energy. Thus the programmable thermostat
· Programmable Thermostats are automatic.
A programmable thermostat is one that set to adjust up and
down the temperature of the house automatically, according
to the environments temperature without you getting up to
set it manually every time that surrounding temperature
changes. They are also called automatic thermostats, they
can adjust and readjust the temperature by themselves
according to the way you set them, whether you are present
in the house or not.
· They cut on energy consumption.
They have been designed particularly to help you save
energy. For instance, during cold days of January that you
are away at work the house doesn't need to be warmed. It
doesn't need to cool either during those hot days of May
that you are not at home. You only need to set in advance,
in the morning how you want the temperature to be throughout
the day. This way power that is spent in heating or warming
up an unoccupied house will be saved, thus keeping down your
· They demand less attention.
They are preferred in public and/or commercial buildings
that are only occupied during the day. Besides, in places
like this no one will notice to set or adjust temperature
levels due to human forgetfulness. The programmable
thermostat will remember the instructions given to it,
sometimes for several days. You set the time of day that
periods of "hot" or "cold" starts and what temperature you
would like during that time, the thermostat will carry the
instructions and adjust the temperature of the room
automatically. This can come in handy at night, before you
sleep you set the present times comfortable temperature, and
morning's temperature. This way you will not wake up to a
chilly morning, and also you will save cooling power. It's
been proved that the power it takes to cool the house is
more than what it takes to warm up the house.
Common types of programmable thermostats include:
· The electromechanical Programmable thermostats.
Programming or setting programmable thermostats is easy, it
is done by sliding two levers on a temperature scale and
then readjusting the clocks' movable tabs. The time sets is
only "evening" or "morning". They store the setting for the
given day and will work automatically according to your
temperature and time selection. Such are the common types
and they are called electromechanical because of how you
adjust and readjust clock and temperature.
· Digital programmable thermostats.
However there are other types that remember instructions for
several days. They are called Digital Programmable
Thermostats and are conspicuous by a small LED read out
screens and buttons for entering data as in the way a small
calculator looks. They are set by typing in the temperature
levels you want at what time of the day. Unlike the
electromechanical, they provide four time presets instead of
two. Digital programmable thermostats have been known to
provide accurate temperature adjustments. They retain your
instructions for several days and if the weather patterns
remain the same you dont have to go through the trouble
of re-programming them every day.
· The Hybrid Programmable thermostats.
The Hybrid Programmable thermostats combine the usability of
the digital programmable and the electromechanical. They are
easier to handle as they address the concern raised by some
people; as the Digital Programmable are difficult to
programme and so the Hybrids were introduced. They can be
preset manually like in the electromechanical by adjusting
clock levers and temperature knobs, but they retain the
precision and memory of the Digital Programmable
· Light sensing programmable thermostats.
There are thermostat types that sense the temperature of
light in the room and readjust. They are called Light
Sensing Programmable thermostats. When light temperatures of
the room start to increase they sense that the room is
occupied by persons who have switched on the lights, they
then start to cool the house if it's hot outside or warm the
room if it's cold. When lights are switched off they sense
the decreased light temperature and know that the room is
unoccupied. They cut down on the cooling or the warming. The
light sensing programmable thermostats are very effective
for offices or stores where people have to operate with
lights on. They conserve a lot of energy compared to
· WI-FI Enabled Thermostats.
Some programmable types let you set and reset your air
conditioning system over Wi-Fi. You may be away at work and
you decide to leave early for home, in such a case you just
get onto your Smartphone and connect to your air
conditioning system's Wi-Fi and make necessary adjustments.
Or if you are at the airport planning to travel for a long
time and you forgot to readjust your thermostat you can
easily do it over Wi-Fi. Thermostats are an ultimate way to
cut down on energy it requires to condition the temperature
of the house. They are ideal for Singapore as in any other
country that tries to conserve electricity. Food stores can
now not undergo losses of products spoiling because of too
high or too low temperatures, and your children left at home
won't have to persevere in adverse temperatures until you
get home to readjust your thermostat.
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