Return Air Grille Part No.
250 SQ. IN
MINIMUM
FREE AREA B
250 SQ. IN.
MINIMUM
50 SQ LN | FREE AREA |
_ MINIMUM FREE AREA
Furnace to Closet Door Clearance --
5 Inches or more
The closet door MUST have a minimum o1250 Square Inches of free area in the upper half of the door.
If opening for return air is located in the floor or sidewalls and
below the top of the furnace casing:
1.6 inches minimum clearance must be provided on side where return is located, and
2.6 inches minimum clearance must be maintained from the Pont of furnace.
J_ | i5_°_r | _ac/_"t Return Air Closet Door Part No. |
DOOR |
|
FIGURE 3 : Closet To Door Clearance - 6" or Greater
Furnace to Closet Door Clearance --
Greater than 1 Inch and Up to 5 Inches
250 SQ, IN |
|
MINIMUM |
|
t FREE AREA | B |
| 250 SQ. IN |
| MINIMUM |
50 SQ IN. | FREE AREA |
MINIMUM |
|
FREE AREA |
|
1.The closet door MUST have a minimum of 250 Square Inches of free area in the upper half of the door and a minimum of
50 Square Inches of free area in the lower area of the door. The lower closet door grille may be omitted if an undercut of
2.A fully Iouvered closet door MUST have a minimum of 250 Square Inches of free area in the upper half of the door.
As an option to _e lower grill, an undercut of
FIGURE 4 : Furnace To Closet Door Clearance - 1" To 6"
MINIMUM
FREE AREA
MINIMUM
_i_250SQ.. IN.
FREE AREA
Furnace to Closet Door Clearance --
Less than 1 Inch
The closet door MUST have three return air gdlles. The total free area of the two upper grilles must be minimum of 250 Square Inches. The total free area of the lower gdlle MUST be a minimum of 50 Square Inches.
The grilles MUST BE ALIGNED directly opposite the return air grille of the furnace door.
FIGURE 5 : Furnace To Closet Door Clearance - Less Than 1"
Unitary Products Group | 5 |
