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This heater requires a properly sized motorized air inlet shutter,
flexible duct, and exhaust fan. All items must be installed when
the heater is located within the greenhouse.
These components, along with specific instructions, are
provided in the indoor ventilation kit, part number 25995.
Air Inlet
Ideally the air inlet shutter should be located as shown in Fig.4a,
4b, and 4c. However, it may also be installed in any other
location on an end or side wall, especially if water, gas, or
electrical lines create interference. See Fig.4d for alternate
locations at end or side walls.
Regardless of air inlet location, the flexible duct (included with
the ventilation kit) must be installed. The duct must be cut to
proper length to prevent sagging and kinks from preventing
proper air flow to the heater. Separate duct installation
instructions are provided in the duct kit.
Ensure the motorized air inlet and the heater's air inlet are kept
free of any blockages.
FIG. 4a Blower Outlet View
1 1/2 FT MAX.
MOTORIZED AIR INLET
ALIGNED TO AIR INLET
IN BASE OF HEATER
FIG. 4b Underside View
DUCT WITH COLLAR
CENTERED TO AIR INLET
OF HEATER
MOTORIZED AIR INLET SHOWN
WITHOUT DUCT ATTACHED FOR CLARITY
2 FT. MIN.
OUTSIDE AIR
SOURCE
INDOOR VENTILATION REQUIREMENTS
FIG. 4c Side View
HEATER
AIR DISCHARGE
DUCT ATTACHED
TO AIR INLET OF
HEATER, AND CUT TO
PROPER LENGTH. (NO
KINKS OR SAGGING)
FIG. 4d Alternate Air Inlet Locations
END WALL
10 FT. MAXIMUM FROM AIR INLET AT HEATER TO MOTORIZED AIR
18 IN.
INLET SHUTTER, REGARDLESS OF INLET LOCATION. DUCT MUST BE
*
MIN.
INSTALLED
* THE MOTORIZED AIR INLET MUST BE INSTALLED A MINIMUM OF 18 IN. ABOVE THE
GROUND OR TO A HEIGHT NECESSARY TO PREVENT BLOCKAGE FROM OBSTRUCTIONS
(EXAMPLES: SNOW, EXTERIOR PLANT GROWTH, ETC.)
ENG/BYNAME/JIMI/HD220/HD220-5B
18 IN.
*
MIN.
CUT DUCT TO PROPER LENGTH
NO KINKS OR SAGGING
GROUND
18 IN.
*
MIN.
9
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