Mitsubishi SEZ-AD15NL & SUZ-AA15NLHZ 15,000 BTU 16.2 SEER2 Horizontal Ducted Hyper Heat System - R454B - SEZAD15NL/SUZAA15NLHZ
The SEZ‑AD15NL horizontal‑ducted indoor unit teams with the SUZ‑AA15NLHZ Hyper‑Heating (H2i) outdoor condenser to create a single‑zone 15,000 BTU system that keeps larger bedrooms, open‑plan living areas, or quiet office suites perfectly comfortable—even when outdoor temps plunge to –13 °F. Hyper‑Heating INVERTER technology maintains 100 % of rated heat at 5 °F and delivers up to 18,000 BTU of cold‑climate capacity, while R‑454B refrigerant and a Blue Fin‑coated coil boost efficiency and durability.
With a slim 7‑7/8 in. cabinet, the SEZ unit disappears in soffits or ceiling cavities, aided by a factory 21 in. lift condensate pump for flexible drainage. Indoor sound starts around 30 dB(A)—about the hush of a library—so comfort stays unobtrusive.
Covering roughly 650 sq ft, the system carries ENERGY STARcredentials and posts seasonal ratings of 16.2 SEER2 and 9.4 HSPF2. Control options include wired or wireless remotes plus full smartphone scheduling through the Comfort App.
Features
-
Hyper‑Heating INVERTER: 100 % heat at 5 °F, operates to –13 °F.
-
INVERTER‑Driven Compressor: Precise, energy‑saving modulation.
-
Ultra‑Slim 7‑7/8 " Cabinet: Fits tight joists and soffits.
-
Quiet Operation: Indoor sound as low as 30 dB(A).
-
Built‑In 21 " Drain Pump: Hassle‑free condensate removal.
-
Base‑Pan Heater & Blue Fin Coil: Cold‑climate and corrosion protection.
-
Advanced Controls: kumo cloud, wired/wireless remotes, thermostat interface.
What Our Experts Think
-
15,000 BTU horizontal-ducted Hyper-Heat system ideal for single-zone spaces up to ~600 sq ft.
-
Hyper-Heating INVERTER (H2i) technology provides 100% rated heat at 5 °F and up to 18,000 BTU in extreme cold down to –13 °F.
-
Perfect for larger bedrooms, open-plan living areas, or quiet office suites.
-
Durable design with Blue Fin-coated coil and eco-friendly R454B refrigerant.
-
Quiet, efficient operation ensures year-round comfort.
Q&A
-
Q: What size area is suitable for this system?
A: Ideal for single-zone spaces up to ~600 sq ft.
-
Q: Can it handle cold climates?
A: Yes, delivers full-rated heating down to –13 °F.
-
Q: Where can it be installed?
A: Horizontal-ducted configuration fits ceilings, attics, or closets.
-
Q: What refrigerant does it use?
A: R454B, a low-GWP, environmentally friendly refrigerant.
Maintenance Tips
-
Clean or replace filters monthly to maintain airflow and efficiency.
-
Schedule annual professional maintenance for refrigerant and system checks.
-
Keep outdoor unit free of debris for optimal performance.
-
Inspect ductwork and mounting periodically for stability.
-
Ensure condensate lines remain clear to prevent water damage.
