The PLFY-Series four-way ceiling-recessed cassette provides exceptional performance and excellent air coverage. Two styles are available - the PLFY-P-NBMU and the PLFY-P-NCMU. PLFY-NBMU Features: • 33 x 33" cabinet size • Capacity range of 12,000 to 36,000 Btu/h • Sound levels as low as 27 dB(A) • Ventilation air connection • High-efficiency filter option • Branch ducting capability • Auto-fan feature to adjust fan speed based on temperature differentials between space and set point • Integrated condensate lift mechanism to provide up to 33 1/2" of lift