Lifebreath 200STD User Manual

B
DUCTING from
the WEATHERHOODS
Six inch (15cm) diameter insulated ductwithan
integral single piece vapour barrier should be used.
Duct must meet ULC Class 1 fire rating.
A minimum RSI value of insulation should be
equal to 0.75 (R4), or that of the local building codes.
The inner and outer liners of the flexible insu¬
lated duct must be clamped to the sleeve of the
weatherhood (as close to the outside as possible) and
the appropriate port on the HRV. To keep the insulation
and outer liner in place, a clamp and duct tape must be
used. It is very important thatthe fresh air intake line be
given special attention to make sure it is well sealed. A
good bead of high quality caulking (preferably acousti¬
cal sealant) will seal the inner flexible duetto both the
HRV port and the weatherhood prior to clamping.
To minimize airflow restriction, the flexible insu¬
lated duct that connects the two outside weatherhoods
to the HRV should be stretched tightly and be as short
as possible.
See Figure #2 forthe recommended connection
of flexible insulated ducts to both the outside
weatherhoods and the HRV.
Ducting from the HRVto the different areas in the
dwelling is recommended to be galvanized metal when¬
ever possible, though flexible duct can be used in
moderation if so desired.
WARMSIDE DUCTING - General
WEATHERHOOD INSTALLATION
Figure 2
Weatherhood Installation
To avoid possible noise transfer through the
ductwork system, a short length approximately 12 in.
(30 cm) of non-metallic (i.e. NUFLEX f lexible insulated)
duct may be connected between the HRV and the
supply/exhaust ductwork system.
The use of TECHGRILLES ™ (from NUTECH)
as supply air diffusers and air exhaust covers are
recommended. They are efficient, sound absorbing
devices specifically designed for this installation.
If a "regular style" steel grille is used, the pre¬
ferred wall grille size is 5 X12 in. (13 X 30 cm) and floor
grille size is 4 X 10 in. (10.2 X 25 cm). Smaller grille
sizes may restrict air flow.
Main supply and return lines to/from Heat Re¬
covery Ventilator must be 6 in. (15 cm) minimum.
Branch lines to the individual rooms may be as small as
4 in. (10.2 cm), but 5 in. (13 cm) lines are preferred
whenever possible.
To minimize airflow losses in the ductwork sys¬
tem, all ducts should be as short as possible and with
as few bends or elbows as possible. 45° elbows are
preferred to 90° elbows, whenever possible. Use Y
tees instead of 90° tees whenever possible.
All duct joints must be fastened with screws,
rivets or duct sealant and wrapped with a quality duct
tape to prevent leakage. We recommend aluminum
foil tape.
FRESH AIR SUPPLY SYSTEM
The fresh air from the HRV 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 in. (10.2 cm) and nofurtherthan 12 in. (30
cm) from the grille.
NOTE: The grille in the cold air return duct must be
at least 6 1/2 ft. (2 m) from the furnace, if
fossil fueled, or as specified by
local regulatory codes.
The use of balancing dampers and/or adjustable
grilles to balance the flow rates into various rooms is
recommended. The TECHGRILLE ™ , available in 4",
5", 6" (100,125 and 150 mm) is highly recommended.
5

Lifebreath 200STD Specifications

General

Brand	Lifebreath
Model	200STD
Category	Fan
Language	English