Lennox MPA012S4S-1L Service Manual page 53

M22A Indoor Cassette Units Clearances
INSTALLATION
HANGERS
LEVELING
ADJUSTMENT
NUT (4)
CEILING
Minimum Clearance from Structural Ceiling to Drop Ceiling:
AIR
OUTLET
DIFFUSER
PANEL
36"
(914 mm)
M22A009, M22A012, M22A018 -- 10-1/4" (260 mm)
Minimum Clearance to Floor - 98-1/2" (2500 mm)
AIR
INLET
23-5/8 (600)
(Ceiling Opening)
36"
(914 mm)
36"
(914 mm)
AIR
OUTLET
36"
(914 mm)
Lennox Mini-Split Service Manual / Page 53