Lifebreath CONTROLAIR 15 200MAX - Manual (Page 20)

20
SUPPLY AIR DUCTING
In homes without a forced air furnace, fresh air should be
supplied to all bedrooms and living areas, excluding
bathrooms, kitchen and utility areas. It should be supplied
from high wall or ceiling locations. Grilles that diffuse the air
comfortably such as the Techgrille™ are recommended.
If the floor is the only option available, then special care
should be taken in locating grilles. Areas such as under
baseboard heaters will help to temper the air. Also optional
inline duct heaters are available for mounting in the supply
duct work to add heat if required.
In homes with a forced air furnace, you may want to connect
the HRV/ERV to the furnace ductwork (see information below).
Direct Connection to Furnace Ductwork
Should you wish to hard duct the supply air directly into the
cold air return of the furnace, remember to check the air
flow balance of the HRV/ERV with the furnace fan both
"ON" and "OFF" to determine that it does not imbalance the
unit more than 10%. Also, it is advisable to include a short
length of fabric flex duct or other non-metallic connector in
this hard ducted line in order to keep the HRV/ERV
separately grounded (electrically) from the furnace. This will
avoid a possible shock hazard to service people if a short to
ground develops in one of the devices.
Indirect Connection to Ductwork
If permitted by local codes, an indirect connection may be
made between the HRV/ERV supply duct and the furnace
return plenum. The fresh air from the unit may be directed
at a grille installed in the cold air return duct of the furnace.
The fresh air supply outlet from the unit should be no closer
than 4 inches (100 mm) and no more than 12 inches (300
mm) from the grille.
Stale Air Exhaust System
The stale air exhaust system is used to draw air from the
points in the house where the worst air quality problems
occur. It is recommended that return air ducts are installed
in the bathroom, kitchen, and laundry room. Additional
return air ducts from strategic locations (i.e. greenhouse,
atrium, swimming pool, sauna, etc.) may be installed. Also,
the furnace return duct may be used to exhaust from. In this
method, the exhaust air is not ducted back to the HRV/ERV
with "dedicated lines" from bathrooms, kitchens, etc.
Instead, the exhaust air is drawn out of the cold air return of
the forced air furnace. This method has become popular
and provides good ventilation when installed in accordance
with the instructions.
The furnace blower must be running
when the unit is operating for this system to
be effective.
Dampers and Grilles
The use of balancing dampers and/or adjustable grilles to
balance the flow rates into various rooms is recommended.
We suggest TECHGRILLE™ air diffusers.
• The TECHGRILLE™ is available in 4", 5", 6" and 8" (100,
125, 150 and 200 mm) sizes.
• The TECHGRILLE™ is a round, fully adjustable grille,
which provides superior, quiet air distribution.
We recommend the use of high mounted wall returns with
grilles. The exhaust air duct from the kitchen should never be
connected to a range hood. Instead, the exhaust grille
should be mounted high on the wall at least 4 feet (1.2 m)
horizontally away from the stove. A "flip-up", 6" X 10" (150 X
250 mm) rectangular kitchen grille with removable grease
filter is available (Part No. 10-002).
Dampers should be located just prior to the HRV/ERV to
balance the stale air exhausted out of the house with a fresh
air supply entering the house.
AIR FLOW
SUPPLY
AIR FLOW
EXHAUST
Techgrille Air Diffusers
Kitchen Grille
Removable
filter