Price DF1L-HC displacement diffusers
are intended for mounting in a suspended
ceiling installation for applications requiring
both cooling and heating. The diffuser is
designed to produce a vertical low velocity
displacement air pattern when supplying
cool air or a horizontal high velocity pattern
when supplying heated air. The diffuser
switches from cooling to heating mode
or vice versa with an electric or thermal
actuator. When the DF1L-HC is in cooling
mode it discharges air evenly across the
perforated face with minimal turbulence
or induction of room air. The cool air falls
slowly to the floor and gradually fills the
space. When the DF1L-HC is in heating
mode, it discharges air parallel to the face
towards the perimeter with a high velocity
jet. The superior air quality and low noise
levels make the DF1L-HC suitable for offices,
classrooms or any application where air
quality demands are high, but there is
minimal floor space and a requirement for
both cooling and overhead heating.
- Suspended ceiling installation.
- Dual plenum facilitates heat-cool changeover.
- Heating provided by standard 1" (25 mm) custom flow (AS) slot diffuser with adjustable pattern controls.
- Ships with protective film on face and inlet.
For optional and special finishes see color matrix.
- Equalization Baffle – Aluminum
- Perforated Front Panel and Diffuser Frame – Coated Steel
- Plenum – Coated Steel
- Pattern Controllers – Steel
- Finish – B12 White (Standard)
- Aluminum foil insulation (1/2", 25mm thick).
- Air flow sensing damper (AFSD).
- Actuator options available:
- Electric actuator (EA), 24V floating
point. The electric actuator switches
the diffuser from cooling to heating
mode or vice versa when it is activated
by a duct temperature sensor or signal
from the HVAC system.
- Thermal actuator (TA). For full cooling
mode, the thermal actuator requires
a cooling supply temperature less
than 70°F (21°C). For full heating mode,
the thermal actuator requires a
heating supply temperature greater
than 80°F (27°C). Changeover time
between full cooling and heating
modes is approximately 10 minutes.
The DF1L-HC diffuser is designed to provide
a horizontal pattern during cooling and a
vertical pattern during heating. A 24VAC
actuator is provided the on the DF1L-HC,
which operates a damper in the neck of the
diffuser. In cooling mode this dual-position
damper will open a cooling inlet and direct
cool air through the larger perforated face;
in heating mode it will direct air through
the heating inlet to the slot diffuser.
Discharging warm air through the slot
diffuser will increase velocity and increase
the effectiveness of the warm air in the
room. The actuator must be provided 24V
from the building controls on the clockwise
or counterclockwise terminal when the
changeover is desired. This can be triggered
by a duct temperature sensor, the zone or
Thermal Actuator (TA).
The DF1L-HC diffuser is designed to
automatically provide a low velocity
displacement pattern during cooling and
a high velocity discharge during heating.
An internal thermal actuator mechanism
senses supply air temperature and adjusts
the air pattern to suit heating or cooling
applications. Supply air temperatures of
less than 69°F (21°C) will result in the air
being directed through the larger perforated
face, while supply air temperatures greater
than 81°F (27°C) will result in a high velocity
discharge through the slot diffuser suitable
for heating applications. Changeover time
between full cooling and heating modes is
approximately 10 minutes.