This is a single-zone ductless mini split system that cools and heats one zone through a concealed duct air handler hidden above a ceiling, connected to a matched outdoor condenser. It's built for homeowners who want central-air-style distribution through short duct runs and a ceiling grille, without a visible wall unit.
The Sky Pro Series pairs an outdoor condenser with a matched indoor air handler, each identified by its own model number in Air-Con's ODU/IDU nomenclature. For this listing, model number ASLCI4H4S24 designates the outdoor condenser, and model number ASLEK4H4S24 designates the indoor concealed duct air handler. This 24,000 BTU / 19 SEER pairing is documented on Air-Con's published Sky Pro specification tables and carries an AHRI certificate reference for the matched combination. 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: ASLCI4H4S24 (24,000 BTU/h, 19 SEER, 208-230V)
- Indoor Unit: ASLEK4H4S24, concealed duct air handler (208-230V)
Installation Requirements & Accessories
- Voltage: 208-230V — this system is not compatible with 115V-only circuits.
- Refrigerant line set is sold separately and is not included with this system.
- This is a flare-connection system, not a pre-charged DIY kit — professional vacuum evacuation and refrigerant charge verification is required.
- Not compatible with indoor units outside the matched ASLEK4H4S24 pairing for the ASLCI4H4S24 outdoor condenser.
- Wall sleeve/mounting bracket accessories used for wall-mounted heads do not apply to this concealed duct configuration; ductwork and a ceiling grille are the responsibility of the installer.
Pro-Installer Tip
Concealed duct systems hide the line set and condensate drain above the ceiling, which raises the stakes on flare connections — a leaking flare fitting here means opening a finished ceiling to fix it later. Torque every flare joint to the connection size's spec with a digital torque wrench rather than "feel," and pull the system down below 500 microns with a calibrated micron gauge before releasing refrigerant charge. Skipping a proper vacuum evacuation invites non-condensable gasses into the line set, which shows up later as reduced capacity, compressor strain, or nuisance fault codes. EPA Section 608 certification is required to handle refrigerant on this system, and confirming a tight vacuum is the standard that protects both the compressor's operating life and the system's rated efficiency.
Key Benefits
- Inverter-driven compressor for variable-speed operation rather than fixed on/off cycling.
- 19 SEER efficiency rating on the 24,000 BTU ASLCI4H4S24 / ASLEK4H4S24 pairing.
- Concealed duct air handler keeps the indoor unit out of sight, distributing air through ceiling ductwork instead of a visible wall or cassette unit.
- AHRI-certified matched outdoor/indoor combination.
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity | 24000 | BTU/h |
| SEER | 19 | — |
| Voltage | 208-230 | V |
| Outdoor Condenser Model | ASLCI4H4S24 | — |
| Indoor Unit Model | ASLEK4H4S24 | — |
| Indoor Unit Architecture | Concealed Duct Ceiling | — |
| Zone Count | 1 | — |
| DIY Status | No — Professional Installation Required | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- The outdoor condenser ASLCI4H4S24 is matched to indoor concealed duct model ASLEK4H4S24 as a certified 24,000 BTU / 19 SEER pairing.
- Power supply is 208-230V; this system is not compatible with 115V-only household circuits.
- This is a concealed duct air handler, not a slim one-way or traditional 4-way ceiling cassette — it requires ductwork and a separate ceiling grille, not a joist-bay cutout.
- Not compatible with indoor units outside the ASLEK4H4S24 model paired to the ASLCI4H4S24 outdoor condenser.
- Refrigerant line set is not included and must be purchased and sized separately by the installer.
FAQ
What breaker size do I need for this system?
The manufacturer data provided confirms a 208-230V power supply for this system. Exact breaker amperage is [NEEDS VERIFICATION] — confirm the required breaker size against the outdoor condenser (ASLCI4H4S24) nameplate 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 kit. It is a standard flare-connection system requiring licensed HVAC installation, including refrigerant line set installation, brazing or flaring, and vacuum evacuation, to keep the manufacturer warranty valid.
Is the line set included, and if not, what size do I need to buy?
The refrigerant line set is not included with this system. Exact line set diameter and maximum length are [NEEDS VERIFICATION] — refer to the manufacturer installation manual in the Resources tab for the correct sizing for the ASLCI4H4S24 / ASLEK4H4S24 pairing.
Will the ceiling cassette fit between standard 16-inch on-center joists?
This indoor unit is a concealed duct air handler, not a ceiling cassette. It is installed above the ceiling with ductwork and a separate supply/return grille, not set into a joist bay. Framing and duct routing must be sized to the air handler's own dimensions, which are [NEEDS VERIFICATION] in the data provided here.
Does this system work in cold climates (low-ambient heating)?
This system is listed here as an air conditioner (cooling) configuration at 19 SEER. Heating capacity and low-ambient heating performance for this specific model are [NEEDS VERIFICATION] — check the manufacturer's AHRI certificate and product manual in the Resources tab.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. Refrigerant handling on this system must be performed by an EPA Section 608 certified technician. Refer to the "Resources (System Manuals and Warranty)" Tab above for full warranty terms and manufacturer documentation.
