Connecting the Ductwork
The installer must ensure all ductwork is sized and installed as designed to ensure the system will perform as intended.
The amount of air that the ERV unit will deliver is directly related to the total external static pressure of the system. Static pressure is
a measure of resistance imposed on the blower by the length of ductwork plus the number of fittings used in the ductwork.
A well designed and installed ducting system will allow the ERV to operate at its maximum efficiency.
All ducts should be kept as short as possible and have as few bends or elbows as possible to maximize airflow. 45
º
elbows are
preferred to 90
º
elbows. Use Y-fittings instead of T-fittings whenever possible.
All duct joints must be fastened with screws, rivets or duct sealant and wrapped with mastic or quality duct tape to prevent leakage.
Mastic is preferred but if duct tape is used it should be the aluminum foil type.
Use galvanized (rigid) ducting whenever possible although flexible duct can be used in moderation, if necessary.
A short length (approximately 12 inches [300 mm]) of non-metallic flexible duct should be connected between the ERV and the
supply/exhaust duct system to avoid possible noise transfer through the duct system.
All ducts running through attics and unheated spaces must be sealed and insulated to code.
IMPORTANT
Applications such as greenhouses, atriums, swimming pools, saunas, etc. have unique ventilation requirements which should be addressed
with an isolated ventilation system.
Overview of Installation Methods
There are three methods of installation for the ERV:
• Simplified installation - See “Installation Methods - Simplified (Return/Return)” on page 15.
• Partially dedicated installation - See “Installation Methods - Partially Dedicated” on page 16.
• Fully dedicated installation - See “Installation Methods - Fully Dedicated” on page 17.
Shaping Ducting to Fit Oval Ports
Applicable Unit: SYNC-270TCE-S1
This unit has oval supply and exhaust ports. This enables the units to be as
space efficient as possible. Circumference of the port remains the same as
round ducting. Simply bend a standard duct fitting to the correct shape and
attach to the oval port using the same method as for a round port.
Figure 11. Shaping Ducting to Fit Oval Ports
Residential Energy Recovery Ventilators
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