Evening star., 1937-08-14
NEW AIR SYSTEMS
HAVE GEAR SHIFTS
Better Understanding of
Heat Mechanism of Body
Is Result of Tests.

Vital differences in the biological
requirements for cooling and for heat
ing have resulted rhis year in an
adaptation OF the gear shift" prin-
clple to cir conditioning, according to
William r. Clifford, ma nager of the
Washington branch of the American
Radiator Co.
lust AS the automobile is provided
with three forward speeds and one for
reverse, recent experience has re-
Hlteo in the installation Of equipment
this Summer with the equivalent of
varied speeds for Winter operation
tor heating and a single reverse
mechanism for cooling in year-around
equipment, Clifford said
Utilization of the principle, be e1-
planned, has resulted from a bett ter
nndersta ndlng of the heat mechan-
ism ot the body itself. and ii is varied
In accord with the needs of that
mechanism. Because the body itself
is A. generator Of heat, it is frequently
necessary to vary or decrease the heat
supply in Winter without decreasing
the air supply, while the same char
acterisncs make it necessary to carry
off additional body heat whenever an
additional air supply is required in
Summer, he continued.
New Theory Developed.
As result. ne said, there has been
developed new theory of condition
Ing based on the application Of sep
arste distribution system IN Winter
tor the heat and for the cir supply
with pipe distribution used for the
heat.
Recent rehnemenIs in The piped
svStem, he added, stimulated bv the
development of sutoms tic beat, have
made the most minute regulation of
the heating IN Winter possible, CORE
snond'ng 10 multl-eeared mechsn-
Ism for the forward operation.
One ~ the biggest problems in air
conditonlng. he said has been 70
determine lust what was needed. The
development Of equipment has been
20 rapid hal il exceaded our knowledge
NJ biological requirements and it has
reen necessary 10 find ont Just what
We wanted in the equipment available
Experience and recent research in .he
biological field have modified 10 a
great extent original toncepts.
In the commercial field, where COOL
sne is entirely pracucal from an eco
nomic point Of view, for instance, early
.vstems were frequently installed With
the same delivery system utillzei in
Summer as was used for the delivery
cf heal IN Winter.
Need for More Air
The result was that, when the
eondltloned areas became filed with
people who were generating sno CIV
ING off heat from their own bodies
IN Winter, there was a need for lass
heat, hut. especia lily if there were
smoking, there YVES A need for more
sIr 10 flush the room. and this could
not he obtained without continuing
the heat supply
In Summer the 81 me problem did
not exist, and the one mechs nism for
reverse was suficient, since the more
people there we're in The area the more
need there was TOR both air and
cooling
The ironv Of the Situatio has
reached its epitome, however, in home
installations where, except for rare
Eases, cooling is not vet commonly
considered economically pra cticsl on
mass scale. Here a good many people
who have not installed cooling in
stalled the single forward gear mech
arism for heating so that it would
later be adapted to cooling, or, in
cthere words. a single delivery system.
To correct this situation radiator
heat condiuonin2 or auxiliary con-
o,rloning provided for separate chan
nels for rhe heat and the air so that
the heat delivery could be varied while
maintaining a constant air supply