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HRV 850DFD/850DDD
HEAT RECOVERY VENTILATOR
PRODUCT
SPECIFICATIONS
AND ENGINEERING
INFORMATION
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SUBMITTAL DATA
378-850-4-03
ALDES HRV 850DFD and
850DDD
Heat Recovery Ventilator
ALDES Model HRV 850DFD,
850DDD is a compact heat recov-
ery ventilator designed to exhaust
stale indoor air and supply fresh air
from outdoors. It is intended for
small commercial and institutional
applications, such as office build-
ings, classrooms, dormitories, res-
taurants, health clubs, etc.
It is a technically advanced con-
trolled mechanical ventilation sys-
tem designed to meet the require-
ments of modern, tightly built and
highly insulated buildings. It pro-
vides a consistent supply of fresh
air while lowering heating costs
during the winter by transferring
heat from the exhaust air to the
fresh air stream. During the sum-
mer it also reduces the load on the
air conditioner by lowering the tem-
perature of the fresh outdoor air.
(For southern climates, where air
conditioning costs are the major
concern, it can be provided with an
enthalpy core, on special order, to
reduce the humidity of the fresh air
as well as lower the temperature.)
The system provides an economi-
cal solution for excessive indoor
humidity, odors, stuffiness, and
other indoor air pollutants.
As the two air streams pass through
the HRV, they are separated by thin
plates of aluminum in the core. The
air streams do not mix, so there is
no recontamination of the fresh air
by stale air. Heat passes through
the thermally conductive aluminum
from the warmer air stream to the
colder air stream, recovering most
of the energy otherwise lost to the
outdoors.
Equally important to providing air
change from outdoors to indoors is
a means of distributing the fresh air
to all parts of the building, through a
ducting system. Often, the ducting
of a central forced air system can
be used.
GENERAL FEATURES
Thermally conductive aluminum heat exchange core, cross-flow design,
easily removed for cleaning or service.
Two efficient three speed PSC motors drive dual centrifugal blowers. 120
V. 3.95 Amps each (7.9 Amps total on high speed), 1/4 HP, 1625 RPM, 848
Watts (total) on high speed
Washable filters on each air stream protect the core. Easy to access and
clean.
Defrost: Model 850DFD Interrupts supply air while exhaust air defrosts
core.
Model 850DDD Recirculating defrost. Internal damper closes
fresh air intake and draws indoor air through heat exchange
cores.
Both models: Defrost light indicates when defrost cycle operates
(at temperatures below 27 °F (-3 °C).
Installation accessories and controls make installation simple.
PART NO: 850 DFD / 28 107
850 DDD / 28 108