Evening star., 1937-11-27
NEW THERM0STAT
SOLVES PROBLEM
A Stabilized Temperature
From Burner Now Is
Possible.
BY ELIZABETH GORDON.

BY ELIZABETH GORDON.
Time was when a thermostat was
merely thermostat. mysterious
contrivance adorning the dining room
wall which started the burner when
room temperature fell and stopped
it when room temperature rose.
But like the forerunners OF our
modern motor cars, when an auto
mobile was an automobile if it ran
with motor, the thermostat has
progressed beyond such simple anal
ysis. Like the modern automobile,
which We moderns classify according
to the number of their cylinders, free
wheeling and the like, the thermoStat
has passed out of its infancy. 1t, too,
has many varieties comparing in func-
ton and price to model rs and Is
cylinder special body jobs. etc Many
out-of-date thermostats are limping
along their dutiful way because home
owners do not know about the superior
new models which have been brought
out" during the passing of the years.
The newest model thermostat is
one which uncannily takes stock of
such variables in your comfort as the
changes in outside weather conditions,
the way the wind is sucking the heat
out Of your house and the general
structural tightness of your house.
Distributes Heat.
Like old-model thermostats, it
makes certain that enough heat is
built up by the heating plant to warm
the room in which the thermostat is
level But it does more than that
much more. 1t stays on long enough
for that heat to be distributed all
over the house More than that, it
shuts the burner off soon enough to
prevent overheating. Most mysterious
of all. it does all this in relation to
the outside weather changes, varying
the length of the burner period to
match the heat losses which outside
conditions steal from your house.
With this new-style thermostat the
burner will operate longer and be off
for shorter periods of time during
severe weather, and as the weather
moderates the burner will operate for
q shorter period of time and will
remain off longer. This change in
function is automatic and the owner
doesn't have to change the setting as
the weather changes
If all this seems mysterious and
unbelievable, we agree with you. 1t
is. It's so mysterious that the manu-
facturer's engineers shy off the tick
hsh question of explaining the why's
and wherefores to laymen The best
way to make everything clear is to
explain what old-fashioned model T"
hermostats do.
Keep Getting Colder.
When the thermostat calls for heat
your burner starts. 1t takes several
minutes of burner operation before a
heat response is noticed by either you
or the mercury in the thermostat So
you keep on getting colder, even
though the thermostat has started the
burner. But presently, as all things
come to men who wait, the heat begins
TO come up, finally satisfying the
thermostat, and the burner stops. But
Ihen the heat still keeps coming, even
though the thermostat is satisfied For
the hot water, steam or hot air, what
ever it is that transfers your heat from
IRE to radiators, doesn't cool off as
fast as your thermostat turns itself
Off So your rooms may get uncom-
fortably hot
But, you say, couldn't there be
way for thermostats to be given a
warning that the heat will overshoot
the mark, so they would stop burner
operation before "overshooting" oc-
ours? That's exactly what happened
when thermostats graduated from the
"uodel-T' class. BY devices too COM
plicated to mention here, thermostats
were enabled to shut themselves off
before the desired degree was reached.
allowing the built-up heat to coast up
to the goal line.
Again you say, What if it's a very
cold night and the heat losses from
my house are so great that the built
up heat created by the burner opera
tion isn't great enough to coast up to
the desired point on the thermometer?
Solves Knotty Problem.
That's where the new style thermo-
STAT comes in. For it has solved that
knotty little problem Of getting stabil-
lied temperature from your burner
day in and day out, at any degree you
select. and under any outside weather
conditions.
II all homes were scientifically built
and all heating plants were properly
engineered there would be no reason
for this sensitive little control. Since
they are not, you need heat control
which can meet all conditions of house
construction, as well as heating sys-
tenn design and installation, and still
control the input of heat so as to pro-
duce stabilized temperature regardless
OF the existing outside weather. Con-
sequently, the length of time that an
automatic burner must operate to
maintain stabilized temperature will
depend solely upon the type and con-
struction of the house it serves and
upon the weather changes existing at
that time.
When the heat loss from a house is
sufficient to cause the temperature to
drop about one degree your thermostat
will turn the burner on. But when
will it turn 1t off? That's the trick.
Obviously the burner has to operate
long enough to replace the heat loss.
II the house Is poorly constructed and