2
TFP Directly Connected to
Forced Air Heating System
1. Install 6” oval port collar (provided) on top and
bottom of TFP (Fig. 1). Use (4) 8/32” X 3/8”
screws (provided).
2.
Remove protective backing from pieces of
foam and stick them to the 4 corners of the TFP
on the side being mounted against the plenum.
3.
Remove the 4 mounting bolts from the back of the
TFP cabinet. (Fig. 1)
4.
Attach top and bottom mounting brackets
(provided) vertical to the TFP cabinet and
reinstall mounting bolts.
5.
Lift the TFP into position. Edge of TFP must be
positioned on plenum to allow clearance
needed for latches.
6.
Install the (4) 8/32” X 3/4” mounting screws
(provided) through the brackets and into position.
Tighten and secure.
7.
TFP should now sit securely against the plenum
with the foam in between.
8.
Cut 2 - 6” holes in the plenum. Install ducting to
join TFP to the return air plenum (Fig. 2).
NOTE: Do not support the weight of the TFP on
the duct. Duct must be open and not pinched.
NOTE: Due to possible noise transfer through
the duct system, it may be preferable in some
situations to hang the TFP a short distance from
the plenum, and connect by running flexible
ducting between them. Four nylon hanging straps
are provided for this option.
Type 1 Installation
* Direct connect to furnace/air handler return, or hang
separately and connect to plenum with flexible ducting.
TYPE 1 INSTALLATION
TFP
TFP air cleaner
TFP
TFP
Figure 1
T
F
P
Cold Air Return
Air flow direction
6" port collars
Access door
Power supply
Mounting bracket
Ducting (not included)
Clean (filtered) air port
Mounting bracket
Foam gaskets
FURNACE
Air Flow
Supply Plenum
Install plate here
1" Height
Figure 2
Round port bent to oval
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.
