1938 LaSalle Production - GM Heritage Center

VENTILATING HEATER-DEFROSTER
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increased over 26%. The plastic switch for 1939
series has two speeds in both direct, and indirect
positions. Illumination insures foolproof operation.
The advantages of "Ventilating Heating"—the
second revolutionary engineering advancement
—are many. The most important are freshened
air, draft elimination, and tremendously improved
rear seat heating. Freshened revitalized air is
obtained by introducing fresh, clean air from the
outside directly into the sides, top and bottom of
the heater core where it is healed and evenly
mixed with the recirculated air forced through
the heater core by the fan. In addition, the
freshened air lowers the humidity within the car,
practically eliminating window fogging as well as
the dull, stuffy atmosphere usually existent when
the windows are closed. The constant introduction
of additional air creates a slight pressure
within the car body, preventing air from leaking
into the body around the doors, sills, windows,
etc.. eliminating drafts and greatly improving
heating of the rear seat area, particularly the rear
1939 Heater-Defroster for 1938 Series
floor. Engineering tests reveal an average increase
of rear floor temperatures in a standard five passenger
sedan from 15° to 60°. The unobtrusive
fresh air inlet mounts very simply on the right
side of the body. Painted to match the car it is
inconspicuous. And, inasmuch as the air inlet is
rainproof, in the summertime it can be used in
conjunction with the heater fan to circulate fresh
air during storms. Hygienic and healthful are the
least that can be said of the new Ventilating
Heating as developed by Cadillac.
For more moderate climatic sections where the
temperature rarely falls below freezing during the
winter season, the Cadillac Heater-Defroster
without ventilating heating is available for 1939
Cadillac and LaSalle cars. The assembly is complete
with defroster, installation parts and the
new 1939 model plastic switch. The new Cadillac
Ventilating Heater-Defroster is not available for
1938 and past model Cadillac and LaSalles, but
for these series the new 1939 Cadillac Healer-
Defroster is offered as preuously announced.
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