This is a single-zone ductless mini split system for cooling and heating one room without ductwork. It's built for homeowners installing a ceiling cassette in a drop-ceiling space — a living room, office, or open-plan area — where a wall-mounted head is not the preferred look.
The ASLEC4H4S12 is the indoor half of this pairing — a traditional 4-way ceiling cassette engineered to sit in a drop-ceiling grid and distribute air in four directions, rather than a slim one-way cassette built to squeeze between joists. It is matched to the ASLCI4H4S12 outdoor condenser under the manufacturer's AHRI-certified Sky Pro cassette lineup, rated 12,000 BTU/h at 23 SEER on a 208-230V circuit. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
System Components
- Outdoor condenser: ASLCI4H4S12 (12,000 BTU/h, 23 SEER, 208-230V)
- Indoor unit: ASLEC4H4S12 — traditional 4-way ceiling cassette, 12,000 BTU/h, 208-230V
Installation Requirements & Accessories
- Voltage: 208-230V single-phase. Not compatible with 115V-only circuits.
- Line set sold separately. Exact diameter and maximum run length are not specified in the manufacturer data provided. [NEEDS VERIFICATION]
- Professional installation required — this is not a pre-charged DIY system. No quick-connect fittings or vacuum-free charging are provided.
- Not compatible with the ASLEK4H4S12 concealed-duct indoor head — that is a different indoor unit family and is not part of this cassette listing.
- Ceiling grid/mounting frame for the 4-way cassette is not confirmed as included; verify with the order before installation. [NEEDS VERIFICATION]
Pro-Installer Tip
Flare connections on 4-way cassette line sets are a common source of slow refrigerant leaks, especially where the installer relies on hand-tight fittings instead of a proper torque spec. Under-torqued flares lose refrigerant charge gradually, which shows up months later as poor cooling performance or an "E1"-style communication/protection code as the system compensates for low charge. Use a calibrated digital torque wrench matched to the flare nut size specified in the installation manual, and cut/flare the line with an eccentric flaring tool to avoid stress cracks at the seat. Pull the system down below 500 microns with a micron gauge before charging, and hold vacuum per EPA Section 608 requirements — this is not optional on a 208-230V R410A/R32 system with a field-run line set.
Key Benefits
- Inverter-driven compressor for variable-speed comfort rather than blunt on/off cycling
- 4-way ceiling cassette distributes airflow in four directions from a single drop-ceiling location
- 23 SEER rating on the 12,000 BTU/h Sky Pro cassette pairing
- AHRI-certified outdoor/indoor match (ASLCI4H4S12 / ASLEC4H4S12)
- 208-230V circuit compatibility for standard residential/light commercial dedicated circuits
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity | 12,000 | BTU/h |
| SEER | 23 | — |
| Voltage | 208-230 | V |
| Indoor Unit Architecture | Traditional 4-Way Ceiling Cassette | — |
| Zone Count | 1 | — |
| DIY Status | No — Professional Installation Required | — |
| Outdoor Unit Model | ASLCI4H4S12 | — |
| Indoor Unit Model | ASLEC4H4S12 | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Positive fitment: ASLCI4H4S12 outdoor condenser is AHRI-certified matched to the ASLEC4H4S12 indoor 4-way ceiling cassette, both rated 12,000 BTU/h at 23 SEER, 208-230V.
- Positive fitment: Compatible with dedicated 208-230V single-phase circuits.
- Negative fitment: Not compatible with 115V-only circuits.
- Negative fitment: The ASLCI4H4S12 outdoor unit is not paired in this listing with the ASLEK4H4S12 concealed-duct indoor head — that is a separate indoor unit family sold under a different pairing.
- Negative fitment: Line set is NOT included. Ceiling grid framing/mounting hardware is not confirmed included. [NEEDS VERIFICATION]
- This 4-way cassette is not a slim one-way cassette and is not designed to fit between standard 16-inch on-center joists.
FAQ
What breaker size do I need for this system?
Breaker size is not published in the manufacturer data provided for this model. [NEEDS VERIFICATION] Confirm exact breaker/circuit sizing against the unit's nameplate or installation manual before rough-in.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY pre-charged system. It requires a licensed HVAC professional to install, evacuate, and charge the line set — installation by a licensed HVAC professional is required to maintain warranty.
Is the line set included, and if not, what size do I need to buy?
The line set is not included with this system. Exact line set diameter and maximum run length are not specified in the provided manufacturer data. [NEEDS VERIFICATION] Your installer should size the line set to the AHRI-certified pairing of ASLCI4H4S12 (outdoor) and ASLEC4H4S12 (indoor).
Will the ceiling cassette fit between standard 16-inch on-center joists?
The ASLEC4H4S12 is a traditional 4-way ceiling cassette designed for a drop-ceiling grid, not a slim one-way cassette built for 16-inch on-center joist bays. Confirm ceiling cavity depth and grid opening with your installer before ordering.
Does this system work in cold climates (low-ambient heating)?
Low-ambient heating performance and minimum operating temperature are not specified in the manufacturer data provided for this model. [NEEDS VERIFICATION]
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. Refrigerant handling and line set evacuation must be performed by an EPA Section 608-certified technician. Specific warranty term length (parts/compressor years) is not stated in the manufacturer data provided. [NEEDS VERIFICATION] Full warranty terms are available in the "Resources (System Manuals and Warranty)" tab above.
