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2.1.3 R
ETURN
-R
ETURN
I
NSTALLATION
(C
ONNECTION TO A FORCED AIR SYSTEM
)
2. TYPICAL INSTALLATIONS
(CONT’D)
Filtered air and stale air flow through the forced air system ducts which simplifies
the installation. Filtered air is supplied to the return (plenum) of the forced air unit.
To avoid cross-contamination and achieve highest efficiencies, the forced air system
blower must always be ON (or the unit efficiency will be affected).
See figure below.
NOTE: Home with multiple forced air systems should have 1 unit on each system.
CAUTION
Do not connect the unit (HEPA 1000 or HF 1.0) on any forced air system supply
duct. Connect it only to the air return duct. Do not install duct or duct
connector directly above the forced air unit or not less than 2’ (0.61 m) of the
plenum connection to the forced air unit, as measured along the length of
the duct.
2.1 H
EPA
1000
AND
HF 1.0 U
NIT
I
NSTALLATIONS
(
CONT
’
D
)
