Mitsubishi PLA-AE24NL PUZ-AH24NL 24,000 BTU 22.6 SEER2 Ceiling Cassette Heat Pump System - R454B

The Mitsubishi PLA-AE24NL PUZ-AH24NL ceiling cassette heat pump system delivers powerful climate control with 24,000 BTU cooling and 29,000 BTU heating capacity. Engineered for efficiency with ENERGY STAR® certification and 22.6 SEER2 rating, this system reduces energy costs while maintaining comfort year-round. Advanced 3D i-see Sensor® technology intelligently detects occupancy and adjusts airflow for optimal comfort and efficiency. Low ambient heating capability extends operation down to -13°F, ensuring reliable performance even in harsh winter conditions. Ideal for commercial or residential spaces up to 1,000 sq ft, the ceiling cassette design provides discreet, space-saving installation with even air distribution. The R454B refrigerant formulation meets modern environmental standards while delivering consistent performance. Perfect for offices, retail spaces, apartments, and homes seeking quiet, efficient climate control with advanced comfort features and long-term energy savings.

Discreet Zoned Comfort for Larger Rooms and Commercial Spaces

The Mitsubishi PLA-AE24NL / PUZ-AH24NL pairs a low-profile ceiling cassette indoor unit with a single-zone outdoor heat pump condenser, delivering up to 24,500 BTU of cooling and 31,600 BTU of heating in a footprint suited to spaces up to roughly 1,000 sq ft. Running on next-generation R-454B refrigerant, this system carries a 22.6 SEER2, 13.2 EER2, and 9.8 HSPF2 rating for strong year-round efficiency.

Built-In Intelligence

The 3D i-see Sensor® scans the room to build a thermal profile based on heat signatures, size, and movement, then automatically adjusts temperature and airflow — including scaling back energy use when the space is unoccupied. Reverse-cycle defrost keeps the outdoor coil clear without sacrificing comfort during cold-weather operation.

Reliable Heating Performance in Cold Climates

This system is rated for heating operation down to -13°F, making it a viable primary heat source in colder climates, not just a shoulder-season supplement. At 47°F, rated heating capacity reaches 29,000 BTU (max 31,600 BTU), while cooling at 95°F delivers a rated 24,000 BTU (max 24,500 BTU) with a 0.82 sensible heat factor and up to 4 pints/hour of moisture removal.

Installation-Friendly Design

The PLA-AE indoor cassette includes a built-in condensate lift mechanism capable of raising drainage up to 33-15/32", simplifying installs where gravity drainage isn't practical. The outdoor condenser ships with anti-corrosion coating on the heat exchanger (Bluefin/Sea Coast rated) for durability in coastal or high-exposure installs. Line set size is 3/8" x 5/8".

Smart Control Ready

WiFi control is available through the Mitsubishi Comfort App (requires a separately sold adapter — WiFi is not built in), giving contractors and end users remote scheduling and monitoring options without a hardwired thermostat.

Specifications Table

FAQs

Is this system suitable for cold climates?
Yes. It's rated for heating operation down to -13°F, making it viable as a primary heat source in colder regions, not just supplemental heating.

What refrigerant does this system use?
R-454B, Mitsubishi's next-generation low-GWP refrigerant used across current P-Series systems.

Does this system include WiFi control?
WiFi is available but not built in — it requires a separately sold Mitsubishi Comfort App adapter for remote scheduling and monitoring.

How does the condensate drainage work on the ceiling cassette?
The PLA-AE24NL has a built-in condensate lift mechanism capable of raising drainage up to 33-15/32", which simplifies installation in spaces without gravity drain access.

What size space does this system cover?
It's rated for spaces up to approximately 1,000 sq ft, depending on room layout, insulation, and climate conditions.

What line set size does installation require?
3/8" x 5/8" line set.

Is this a single-zone or multi-zone system?
This is a single-zone system, pairing one PUZ-AH24NL outdoor condenser with one PLA-AE24NL indoor cassette.