![background image](http://html.mh-extra.com/html/carrier/58mcb/58mcb_nstallation-start-up-and-operating-instructions_2562800022.webp)
-- 22 --
PLENUM
OPENING
C
A
B
D
FLOOR
OPENING
A96283
Fig. 21 -- Floor and Plenum Opening Dimensions
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
A96285
Fig. 22 -- Furnace, Plenum, and Subbase
Installed on a Combustible Floor
FACTORY SUPPLIED
CASED COIL OR COIL BOX
FURNACE
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
A07586
Fig. 23 -- Furnace, Plenum, and Coil Assembly or Coil Box Installed on a Combustible Floor
58MCB