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INSTALLATION TYPES
Example only – duct configuration may differ depending on the model.
HRV DUCTING FOR FULLY
HRV/FURNACE DUCTING FOR
DEDICATED SYSTEM
PARTIALLY DEDICATED SYSTEM
BEST
BETTER
1. Stale air is drawn from areas requiring
1. The furnace blower is set to run
local exhaust (bathroom, kitchen, laundry
continuously or interconnected with HRV
room).
for proper fresh air distribution. See
2. Fresh air is distributed to habitable rooms
furnace electrical connection on page 12.
(bedrooms, living room)
2. Stale air is drawn from areas requiring
3. The HRV's airflow must be balanced after
local exhaust (bathroom, kitchen, laundry
installation using the procedure found in
room).
the section "AIRFLOW BALANCING."
3. Fresh air is supplied to the return air
plenum of the furnace.
Suggested for:
4. Due to the difference in pressure, HRV's
• Hydronic baseboard
airflow must be balanced on site using the
• In floor heating
procedure found in the section "AIRFLOW
• Electric baseboard
BALANCING."
• Mini split heat pump
* In the case of a multi-zone system, please
contact Greentek customer service prior to
Benefits:
installing any installation type requiring the use
Provides the best fresh air distribution in
of the furnace interlock
the house; lowest operation cost since the
furnace/air handler unit is not needed.
Suggested for:
• Central furnace
• When ducting fresh air to living area is
not possible or practical
Benefits:
Conditions the fresh air prior to distributing
it throughout the house
Make sure the HRV is
capable of meeting the
required airflow rate.
HRV/FURNACE FOR
SIMPLIFIED INSTALLATION
GOOD
1. The furnace blower is set to run
continuously or interconnected with HRV
for proper fresh air distribution. See
furnace electrical connection on page 12.
2. A minimum separation of 1 m (39'') is
recommended between the two direct
connections.
3. The HRV's exhaust air connection should be
upstream of the HRV's supply air
connection to prevent exhausting any fresh
air.
4. Due to the difference in pressure, HRV's
airflow must be balanced on site using the
procedure found in the section "AIRFLOW
BALANCING."
* In the case of a multi-zone system, please
contact Greentek customer service prior to
installing any installation type requiring the use
of the furnace interlock"
Suggested for:
n bathroom and kitchen already have
• Whe
local exhaust system
• May be suita
ble for retrofitting
Benefits:
Least expensive installation type
INSTALLING THE OUTDOOR VENTS
RECOMMENDED INSTALLATION
3'
3'
(900 mm)
(900 mm)
min.
min.
36"
36"
(1 m)
(1 m)
18"
18"
(460 mm)
(460 mm)
INSTALLING THE VENTS
A well designed and installed ducting system will
• The outer liner, which acts as a vapor
allow the HRV to operate at its maximum
barrier, must be completely sealed to the
efficiency.
outer wall and the HRV using tape and/or
caulking.
• The inner liner of the flexible insulated duct
• A good bead of high quality caulking
must be secured to the sleeve of the hood
(preferably acoustical sealant) will seal the
(as close to the outside as possible) and to
inner flexible duct to both the HRV duct
the appropriate duct connection on the HRV.
connection and the hood prior to securing
• The insulation should remain full and not
them.
crushed.
1. Cut hole between wall studs
2. Insert vent
4. Seal using outdoor rated caulking
5. Attach insulated duct from inside and tape
Intake
• Should be located upstream of prevailing
winds from exhaust
• At a minimum of 900 mm (3') away from
dryer vents and furnace exhaust (medium
or high efficiency furnaces), driveways, oil
36"
36"
fill pipes, gas meters, or garbage
(1 m)
(1 m)
containers.
• Do not locate in the garage, attic, crawl
space, or underneath deck.
Locating the Exhaust Weatherhood
• Not near a gas meter, electric meter or a
walkway where fog or ice could create a
hazard
• Do not locate in a garage, workshop or
other unheated space
• To minimize airflow restriction, the flexible
insulated duct that connects the two
outside weatherhoods to the HRV should
be stretched tightly and be as short as
possible.
• Twisting or folding the duct will severely
restrict airflow.
3. Secure vent with proper screws
5
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