Intake Air; Changing From Side Intake Air To Bottom Intake Air - Heat & Glo Foundation Series Installation And Operating Manual

J. INTAKE AIR
This fireplace has the options of air intake connections on the side or the bottom of the fireplace. This fireplace is approved
for use with 10 inch rigid metal pipe or UL approved 10 inch Class 0 or Class 1 flex for intake air. Use Table 8J.1 for venting
requirements if using UL approved 10 inch flex for intake air.
Vent runs utilizing 10 inch rigid metal pipe may be 110 feet with 11 elbows. We recommend insulating the intake air duct or
using UL approved Class 1 insulated flex in hot, humid or cold climates.
The intake pipe must maintain 1.5X the square inches of the flue pipe in free area. Intake screen/vent must be sized ap-
propriately. Failure to do so will result in higher operating temperatures.
The fireplace may also take room air for combustion. Intake screen/vent must be sized appropriately. You must plan for
the replacement air that is consumed from the room by the fireplace. Do not draw intake air from a crawl space or an attic
(ventilated or not ventilated).
WARNING! Risk of Fire! DO NOT draw intake air from an attic or crawl space. Appliance could overheat.
Use Table 8J.2 for reference on CFM replacement air if drawing intake air from inside the house and open air requirements
for intake screen/vent or consult Hearth & Home Technologies for more information.
Table 8J.1
UL Approved 10 Inch Class 1 or Class 0 Flex Intake Air Venting Requirements
FDN-4-ST
Length
FDN-5-ST
of
FDN-6-ST
Run
FDN-7-ST
K. CHANGING FROM SIDE INTAKE AIR TO BOTTOM INTAKE AIR
Step 1: Remove 4 screws that hold collar plate in place.
Refer to Figure 8K.1.
Figure 8K.1
Step 3: Turn plate so collar is facing down, slide plate into slots on each side.
Refer to Figure 8K.3A and Figure 8K.3B.
Figure 8K.3A
28
Heat & Glo • FDN-4-ST, FDN-5-ST, FDN-6-ST, FDN-7-ST Installation Manual • 16400-9801 Rev. H • 11/19
Number of offsets
0-3 4 5 6
100 ft 90 ft 80 ft 70 ft
45 ft 35 ft 25 ft 15 ft
70 ft 60 ft 50 ft 40 ft
32 ft 20 ft 15 ft 10 ft
REMOVE 4
SCREWS
Figure 8K.3B
Table 8J.2
Fireplace
Size
FDN-4-ST
7 8
FDN-5-ST
60 ft 50 ft
FDN-6-ST
5 ft N/A
FDN-7-ST
30 ft 20 ft
N/A N/A
Step 2: Slide collar plate off fireplace.
Refer to Figure 8K.2.
Figure 8K.2
Required
CFM Requirement
480 CFM 75 Sq. Inches
640 CFM 75 Sq. Inches
800 CFM 75 Sq. Inches
960 CFM 75 Sq. Inches
Step 4: Re-attach the plate with four screws.
Refer to Figure 8K.4.
Figure 8K.4
Open Air
INSTALL 4
SCREWS