Lennox International Inc AIR CLEANERS/ FILTERS Forced air handler/furnace system with an HRV/ERV

Healthy Climate® 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’ outlet 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 (See figure 8.) The output air from the HEPA system then needs to be installed into the main return of the air handler/furnace system.

Preparation:					Example of Return
					to Return Installation
Here are some things to consider as you					with an HRV/ERV
decide where to install the HEPA system
		/ERV			For homes with a forced
with an HRV/ERV.
					air handler/furnace sys-
Location:					tem and an HRV/ERV
					system.
•	Make sure there is room to open the
					Additional Return
	HEPA filter access panel for filter
	changes/inspections.				Air Handler/Furnace
•	Keep the HEPA system in a location				Air Handler/Furnace Filter
	where you can still access the air han-			Figure 8.	HEPA System
	dler/furnace filter.
• Keep the HEPA system away from pos-		NOTE: This filtration system is an ADDITIONAL filter, and does NOT
	sible water damage	replace the existing air handler/furnace system filter.
•	Vibration pads will reduce vibration for
			•	Each connection must be sealed with aluminum
	installations where the unit is placed on
	the floor.			tape or mastic, including all take offs.
•	Install HEPA System on floor or suspended platform.		•	Installed duct runs should be as straight as possible
	If the unit is suspended, screws must not penetrate			(if the duct runs are too long, reduced CFM may
	through the cabinet. Make sure that you have the			result).
	proper chains/straps/joists and equipment to keep		•	If duct is exposed to unconditioned air, externally
	unit secure.			insulated flex duct is highly recommended.
Inlet (Marked as ‘Air In’ on unit):			•	Externally insulated flex duct can also be used for
• Most HRV/ERV systems will not move as much air				noise reduction purposes
	as the HEPA system. For these systems, install an		•	For best indoor air quality, do not use ductboard or
	additional return from another treated air source			fiberglass inside of ducts.
	into the HEPA system.		Electricity:
•	If using an additional return duct, it should be		•	The unit must be plugged into a grounded 120V,
	installed upstream of any humidifiers. The fresh			60Hz outlet.
	air outlet of the HRV/ERV should be “Y” connected		Required Materials for Installation of Unit:
	to the additional return duct then connected to the
	inlet of the HEPA system.		For Model: HEPA-20
•	The additional return duct (if any) should be		8” diameter flex or rigid duct (as required)
	installed at least 8 ft. away from the outlet duct on		6” diameter flex or rigid duct (as required)
	the main return.		6” diameter 45 degree takeoff
•	Duct both the HRV/ERV and the additional return		Aluminum tape or mastic
	into the inlet of the HEPA system.		Misc. hanging materials - field provided
Outlet (Marked as ‘Clean Air Out’ on unit):			For Models: HEPA-40 & HEPA-60
•	Outlet duct should be installed as close to the air		10” diameter flex or rigid duct (as required)
	handler/furnace inlet as possible but not directly into		8” diameter flex or rigid duct (as required)
	the return air elbow of the main return.		10” diameter 45 degree takeoff
•	To reduce static pressure, install outlet with a 45		8” diameter 45 degree takeoff
	degree takeoff directly up-line from the return air elbow		Aluminum tape or mastic
	of air handler/furnace.		Misc. hanging materials - field provided
Ducting:			NOTE: Be sure to review ‘Rules for Safe Installation
•	If HEPA system is installed where inlet and outlet
	collars face down, metal elbows must be connected		and Operation’ on page 1 of this document before
	to both inlet and outlet collars.		start-up of this unit.

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