This is a single-zone ductless mini split cassette system for cooling and heating one room or open area without ductwork. It's built for homeowners or contractors installing into a drop ceiling — commercial offices, finished basements, or additions where a wall-mounted head isn't practical.
The Air-Con Sky Pro Series is built around a matched outdoor condenser and cassette-type indoor head, listed together as an AHRI-certified pair. The indoor unit is a traditional 4-way ceiling cassette, designed to mount in a drop ceiling and distribute air in four directions — a different install path than a slim one-way cassette, which is built to fit between standard 16-inch on-center joists. 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 unit: Air-Con Sky Pro model ASLCI4H4S24 (24,000 BTU/h, 19 SEER)
- Indoor unit: Air-Con Sky Pro cassette-type model ASLEC4H4S24 (traditional 4-way ceiling cassette, 24,000 BTU/h)
Installation Requirements & Accessories
- Voltage: 208-230V — confirm your electrical circuit is rated for 208-230V before ordering; this system is not compatible with 115V-only circuits
- Refrigerant line set: sold separately — not included with this system
- Line set size/length: [NEEDS VERIFICATION] — not published in the manufacturer data provided
- Not compatible with 115V-only circuits
- Not a listed match for the ASLEM4H4S24 (wall mounted) or ASLEK4H4S24 (concealed duct) indoor heads — this listing is for the ASLEC4H4S24 cassette-type indoor unit only
- Professional installation required — this is not a DIY pre-charged line set kit
Pro-Installer Tip
Flare connections on 208-230V cassette systems are a common callback point: an under-torqued or over-torqued flare nut leaks refrigerant slowly, which shows up months later as reduced capacity or an "E1" communication/protection code at the indoor head. Torque every flare joint to the manufacturer-specified value with a digital torque wrench rather than by feel, and confirm the joint holds under a nitrogen pressure test before pulling vacuum. Pull the system down below 500 microns with a calibrated micron gauge and hold that vacuum to confirm no leaks before charging — a rushed vacuum is the single most common cause of early compressor failure on cassette systems. This work falls under EPA Section 608 refrigerant handling requirements; only a certified technician should open the refrigerant circuit.
Key Benefits
- Inverter-driven compressor for variable-speed comfort rather than blunt on/off cycling
- 19 SEER efficiency rating on the 24,000 BTU cassette pairing
- 4-way air discharge from the ceiling cassette distributes conditioned air across an open room
- 208-230V power supply matched to the 24,000 BTU capacity class
- AHRI-certified matched outdoor/indoor pairing (ASLCI4H4S24 / ASLEC4H4S24)
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity | 24,000 | BTU/h |
| SEER | 19 | SEER |
| Voltage | 208-230 | V |
| Indoor Unit Architecture | Traditional 4-Way Ceiling Cassette | — |
| Zone Count | 1 | zone |
| Outdoor Unit Model | ASLCI4H4S24 | — |
| Indoor Unit Model | ASLEC4H4S24 | — |
| DIY Status | No — Professional Installation Required | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Compatible: outdoor unit ASLCI4H4S24 is AHRI-certified as a matched pair with indoor cassette unit ASLEC4H4S24
- Compatible with dedicated 208-230V single-phase circuits
- Not compatible with 115V-only circuits
- Not a listed match for the ASLEM4H4S24 (wall mounted) or ASLEK4H4S24 (concealed duct) indoor units — those are separate Sky Pro model families sharing the same outdoor unit line, not this cassette listing
- Refrigerant line set is NOT included — must be purchased separately and sized per manufacturer specifications
FAQ
What breaker size do I need for this system?
Breaker size is [NEEDS VERIFICATION] — the manufacturer data provided does not list amperage or breaker requirements for this model. Confirm against the nameplate rating and the "Resources (System Manuals and Warranty)" tab before rough-in.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is a standard flare-connection system, not a pre-charged DIY kit. Professional installation by a licensed HVAC technician is required 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. Line set sizing is [NEEDS VERIFICATION] — the provided manufacturer data does not specify liquid/suction line diameters for the ASLCI4H4S24/ASLEC4H4S24 pairing.
Will the ceiling cassette fit between standard 16-inch on-center joists?
This is a traditional 4-way ceiling cassette, designed for installation into a drop ceiling or open ceiling cavity rather than a joist bay. It is not the same architecture as a slim one-way cassette built to fit between 16-inch on-center joists.
Does this system work in cold climates (low-ambient heating)?
Low-ambient heating performance and operating temperature range are [NEEDS VERIFICATION] — the manufacturer data provided does not publish heating capacity or cold-climate operating limits for this model.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. Refrigerant circuit work (flare connections, vacuum, and charging) must be performed by a technician holding EPA Section 608 certification. Warranty term length and coverage details are [NEEDS VERIFICATION] — refer to the "Resources (System Manuals and Warranty)" Tab above for the full manufacturer warranty document.
