Lifebreath 200STD User Manual

NOTE: Do not use any louvered hoods with
installation of LIFEBREATH ™ HRV,
as this will restrict the required air flow.
The TECHGRILLE ™ is a round, fully adjust¬
able grille, which provides superior, quiet air distribu¬
tion. See Fig. 3.
The fresh air supply from the HRV to the house
can follow several installation strategies. See Figures
#4 and #5 for two installation schematics. The installa¬
tion schematic shown in Figure #4 has proven to be an
excellent method for both retrofit and new home situa¬
tions where a forced air furnace is available. The
installation schematic shown in Figure #5 is often
installed in new or exisiting homes that do not have a
forced air ducting system to distribute the fresh air
throughout the house. For Figure #5, fresh air should
be supplied to all rooms, but it is not required in those
with exhaust points in them.
Supply airgrilles may be floor or highwallmounted,
but should not be located in areas where the fresh air will
cause an uncomfortable draft on the occupants.
to avoid drafts . Avoid installing supply air grilles in
bathrooms, or any other small room (with significant air
quality problems) if it has an exhaust duct.
INSTALLATION FIGURE #6
In this method, the supply air is ducted directly
into the cold air return of the central forced air furnace.
NOTE: The installation schematics show
a balancing damper on the supply
duct leaving the unit. This is installed
to balance the supply of air from the unit.
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 with the
furnace fan both "ON" and "OFF” to determine that it
does not imbalance the HRV 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 separately grounded (electri¬
cally) from the furnace. This will avoid a possible shock
hazard to Service People if a short to ground develops
in one of the devices.
STALE AIR RETURN SYSTEM
The stale air return 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 brought backfrom the bathroom, kitchen, and
laundry room. Additional return air ducts from strategic
locations (i.e. greenhouse, atrium, swimming pool,
sauna, etc.) may be installed. Notethatthe installation
schematics show balancing dampers and/or adjust¬
able grilles on all return air lines coming back to the unit.
These are installed to help balance the "draw" from the
different areas of the house.
The damper located just priorto the Heat Recov¬
ery Ventilator is provided to balance the stale air
exhausted out of the house with fresh air supply enter¬
ing the house.
We recommend the use of high duct mounted
wall returns with grilles. The exhaust air line from the
kitchen should never be connected to a range hood.
Instead, an exhaust air grille should be mounted high
on the wall at least 4 ft. (1.2 m) horizontally away from
the stove. A flip up 8" x 10" rectangular kitchen grille
with removable grease filter is available from NUTECH
if desired.
The gyproc and studs of the wall can be used as
a "duct" for high wall returns. When using wall cavities
this way, they should be lined with either galvanized
sheet metal or polyethylene (check Local Codes). The
wall plate and the floor ply must be cut out to accept
either ducting or the proper sized sheet metal boot.
INSTALLATION FIGURE #7
In this method, the exhaust air is not ducted back
to the HRV with "dedicated lines": from bathrooms,
kitchens, etc. Instead, the exhaust air is drawn out of
the cold air return of the central forced airfurnace. This
method has become popular and provides good venti¬
lation when installed in accordance with the noted
instructions.
AIR FLOW
SUPPLY
Fig.3
TECHGRILLE
Schematic
AIR FLOW
EXHAUST

Lifebreath 200STD Specifications

General

Brand	Lifebreath
Model	200STD
Category	Fan
Language	English