Mitsubishi SEZ-AD15NL & SUZ-AA15NLHZ 15,000 BTU 16.2 SEER2 Horizontal Ducted Hyper Heat System - R454B

Mitsubishi SEZ‑AD15NL & SUZ‑AA15NLHZ: 15,000 BTU Hyper‑Heating Ducted Concealed Heat‑Pump System

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 6 50 sq ft , the system carries ENERGY STAR® credentials 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.

General Information

• System Type: Concealed ducted indoor unit + Hyper‑Heat single‑zone heat‑pump condenser

• Models: Indoor – SEZ‑AD15NL | Outdoor – SUZ‑AA15NLHZ

• Capacities: 15,000 BTU Cooling | up to 18,000 BTU Heating (rated 15 k)

• Room Size: ~650 sq ft

• Operating Range: Cooling 14–115 °F · Heating –13–75 °F 

• ENERGY STAR®: Yes

• Refrigerant / Charge: R‑454B, ~3 lb

Key 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.

Specifications (Rated Conditions)

• Cooling Capacity: 15,000 BTU

• Heating Capacity: Rated 15,000 BTU · Max 18,000 BTU

• Electrical: 208/230 V · 1‑Ph · 60 Hz

• Indoor Sound: 30–37 dB(A) (Lo‑Hi)

• Piping: Liquid ¼ " | Gas ½ " | Max length 100 ft | Max height 50 ft 

• Outdoor Dimensions / Weight: 33‑1/16 " W × 13 " D × 34‑5/8 " H · 115 lb 

Included Components

• Indoor Unit: SEZ‑AD15NL horizontal ducted air handler

• Outdoor Unit: SUZ‑AA15NLHZ Hyper‑Heating condenser

Ideal For

Owners who need a hidden, whisper‑quiet, cold‑climate solution for single zones such as master suites, basement flats, studios, or professional offices—delivering Hyper‑Heat performance, smart app control, and Mitsubishi reliability.