Electrolux 350 ユーザーズマニュアル

5

Dealer Installation Instructions

Forced air handler/furnace system with an HRV/ERV:

This application provides filtration of all Outdoor Air (OA) that is brought into 
the home through the HRV/ERV, thus reducing the introduction of dust, pollen 
and mold from the outdoor air. For systems that have HRV/ERV units installed, 
we recommend ducting the ‘fresh air’ outflow from the HRV/ERV into the 
HEPA system. If the HRV/ERV CFM (cubic feet per minute) rating is lower 
than that of the HEPA system, an additional return needs to be installed into 
the HEPA system. The outflow air from the HEPA system then needs to be 
installed into the main return of the air handler/furnace system. Ensure that 
you follow the proper installation instructions as outlined in the HRV/ERV 
Installation manual(s).

Preparation:

Here are some things to consider as you decide where to install the HEPA 
system with an HRV/ERV.

Location:

• Make sure there is room to open the HEPA filter access panel for filter 

changes/inspections.

• Keep the HEPA system in a location where you can still access the air 

handler/ furnace filter.

• Keep the HEPA system away from possible water damage
• Vibration pads will reduce vibration for installations where the unit is  

placed on the floor.

• Install HEPA System on floor or suspended platform. If the unit is suspended, 

screws must not penetrate through the cabinet. Make sure that you have 
the proper chains/straps/joists and equipment to keep unit secure. 

Intake (Marked as ‘Air In’ on unit):

• Most HRV/ERV systems will not move as much air as the HEPA system. 

For these systems, install an additional return from another treated air 
source into the HEPA system.

• If using an additional return duct, it should be installed upstream of any  

humidifiers. The fresh air outflow of the HRV/ERV should be “Y” connected 
to the additional return duct then connected to the inlet of the HEPA system.

• The additional return duct (if any) should be installed at least 6 ft. away 

from the outflow duct on the main return.

• Duct both the HRV/ERV and the additional return into the intake of the 

HEPA system. 

Outflow (Marked as ‘Clean Air Out’ on unit):

• Outflow duct should be installed as close to the air handler/furnace inlet  

as possible but not directly into the return air elbow of the main return.

Ducting:

• If HEPA system is installed where inlet and outflow collars face down,  

metal elbows must be connected to both inlet and outflow collars.

• Each connection must be sealed with aluminum tape or mastic, including 

all take offs.

NOTE: This filtration system is an ADDITIONAL filter, and does NOT replace 
the existing air handler/furnace system filter.
Installed duct runs should be as straight as possible (if the duct runs are  
too long, reduced CFM may result).

• If duct is exposed to unconditioned air, externally insulated flex duct is 

highly recommended.

• Externally insulated flex duct can also be used for noise reduction purposes.
• For best indoor air quality, do not use ductboard or fiberglass inside of ducts.

Electricity:

• The unit must be plugged into a grounded 20V, 60Hz outlet.

Flex or rigid duct (length as required) 

8” round & 6” round 

Takeoffs 

One 8” & One 6” 

Flex or rigid duct (length as required) 

0” round & 8” round 

Takeoffs 

One 0” & One 8” 

Aluminum tape or mastic as required 

Misc. hanging materials - field provided 

NOTE: Be sure to review ‘Rules for Safe Installation and Operation’ on page  
of this document before start-up of this unit.

HRV/ERV

Example of Return to 
Return Installation 
with an HRV/ERV 
For homes with a forced 
air handler/furnace sys- 
tem and an HRV/ERV 
system. 

Additional Return 
Air Handler/Furnace 
Air Handler/Furnace Filter 
HEPA System