www.lifebreath.com
11
8
T
HE
D
UCT
W
ORK
S
YSTEM
A properly designed ducting system will allow the HRV to operate at its maximum efficiency. (Air flow
will be restricted by undersized ducting, use of too many elbows, tees, bends, etc.). Always try to
keep duct runs as short and straight as possible.
All joints must be airtight, sealed and impervious to moisture. See below for exact duct sizes and
location.
To minimize pressure drop and noise, galvanized metal ducts, properly sized, are recommended.
Keep ducting as short as possible and use a minimum of elbows and tees.
Connecting sections and shorter runs may be flexible ducting one size larger than the metal
equivalent. Use flexible duct connectors at the HRV to avoid noise transmission.
All duct joints must be secured with screws, rivets or duct sealant and sealed with aluminum duct
tape to prevent leakage.
Attention
•
Fully insulated ducting with an integral vapour barrier must be used on all runs passing through
unheated areas in order to avoid condensation problems and energy losses from the air systems.
