Lennox BAC020SNM Installation, Operating And Maintenance page 44

MULTIDIRECTIONAL HORIZONTAL ROOFCURB
BAC BAG
035
BAH BAM
1F 2F
Front supply air Front return air
1F' 2F'
(*) This roofcurb is also necessary for all cooling only or heatpump rooftop with auxiliary electric heater or hot water coil.
WARNING : ONLY ONE OF THE 4 FOLLOWINGS POSSIBILITIES :
2F - 1F / 2F - 1F'
2F' - 1F / 2F' - 1F'
BALTIC R410A-IOM-0708-E Page 43