1938 LaSalle Production - GM Heritage Center

Bulletin No. 36A.
October 1. 1938
VENTILATING HEATER-DEFROSTER FOR 1939
YEAR after year Cadillac Heaters have been
outstanding in capacity and value but the
new 1939 Ventilating Heater-Defroster
without question is the most advanced development
in motor car heaters ever offered the
motoring public.
Air Inle.l
1939 Switch
1939 Ventilating Heater-Defroster
The heating capacity has been greatly increased,
maximum defrosting has been almost doubled
and increased fan size has reduced motor speed
for quieter operation. A redesigned heater core
incorporating an automatic upper tank air vent
and improved insulation reduces water circulating
sounds and a new door design insures permanent
rattleproof rigidity besides improving air flow
control. Yet all of these major improvements are
in addition to the two new and revolutionary
engineering advancements which makes the new
Cadillac Ventilating Heater-Defroster for 1939
Cadillacs and LaSalles the finest motor car healer
ever placed on the market.
Direct and indirect heating—one of the two
revolutionary engineering advancements of the
new Cadillac Ventilating Heater-Defroster—is
accomplished by utilizing a reversible motor. To
provide direct heat, hot air is blown out of the
face of the heater in the conventional manner,
and normal defrosting is obtained. Air is drawn
in through the face of the heater and blown out
the sides top and bottom to obtain indirect heat.
In this position the heat is diffused throughout
the car body without any strong, concentrated
blasts, providing healthful home-like heating. In
addition, in the indirect position maximum defrosting
is obtained, almost doubling the effectiveness
of previous defrosters. Maximum heat output
of the new Ventilating Heater-Defroster is
(over)
1939 Ventilating Heater Installation