This is a single-zone ductless 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 in a living room, office, or commercial space where a wall-mounted head isn't practical.
The ASLCI4H4S18 outdoor condenser is AHRI-certified as a matched pair with the ASLEC4H4S18 indoor ceiling cassette, delivering 18,000 BTU/h of cooling and heating at 22 SEER on a 208-230V circuit. The 4-way cassette design is intended for drop-ceiling installation, distributing airflow in four directions across a room. 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: ASLCI4H4S18 (208-230V, 18,000 BTU/h, single-zone outdoor unit)
- Indoor Head: ASLEC4H4S18 — traditional 4-way ceiling cassette, 18,000 BTU/h, 208-230V
Installation Requirements & Accessories
- Voltage: 208-230V — this system is not compatible with 115V-only circuits
- Line set required for connecting outdoor and indoor units; sold separately
- Line set size and maximum run length: [NEEDS VERIFICATION] — confirm in installation manual
- Not compatible with indoor units outside the matched Sky Pro ASLCI4H4S18/ASLEC4H4S18 AHRI pairing (e.g., ABZEM4H4S12, ASLEK4H4S09, ABXEM4H4S18, ALPEM4H4E18, ABHEM4H4S09)
- Wall sleeve, ceiling grid tiles, and condensate pump (if required) are not included
- Professional installation required — this is not a pre-charged DIY system
Pro-Installer Tip
Flare connections on cassette systems are a common source of slow refrigerant leaks, especially on 3/8" and larger liquid lines where under-torqued flares seat unevenly. A loose or over-torqued flare eventually shows up as a warm-side "E1" communication fault or a gradual loss of cooling capacity months after installation. Use a digital torque wrench matched to the flare nut size specified in the installation manual, and always pull the system down below 500 microns with a calibrated vacuum gauge before opening service valves — this protects the compressor and is required practice under EPA Section 608 refrigerant handling rules.
Key Benefits
- Inverter-driven compressor for variable-speed comfort rather than fixed on/off cycling
- 4-way ceiling cassette spreads conditioned air across the room from a single drop-ceiling location
- 22 SEER rating on the 18,000 BTU capacity for this model pairing
- AHRI-certified matched outdoor/indoor pairing (ASLCI4H4S18 / ASLEC4H4S18)
- 208-230V single-phase circuit compatibility
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity | 18,000 | BTU/h |
| SEER | 22 | SEER |
| Voltage | 208-230 | V |
| Indoor Unit Architecture | Traditional 4-Way Ceiling Cassette | — |
| Zone Count | 1 | zone |
| Outdoor Unit Model | ASLCI4H4S18 | — |
| Indoor Unit Model | ASLEC4H4S18 | — |
| DIY Status | No — Professional Installation Required | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- The ASLCI4H4S18 outdoor condenser is AHRI-matched to the ASLEC4H4S18 indoor 4-way ceiling cassette — buy this pair together as listed.
- Compatible with dedicated 208-230V single-phase circuits only; not compatible with 115V-only circuits.
- Not a listed match for other Air-Con indoor families such as ABZEM4H4S12, ASLEK4H4S09 (ducted), ABXEM4H4S18, ALPEM4H4E18, or ABHEM4H4S09.
- Line set is NOT included — this is a standard flare-connection system, not a pre-charged DIY kit.
- Ceiling grid tiles, drop-ceiling framing hardware, and wall-mounted thermostat/controller (if desired) are not included.
FAQ
What breaker size do I need for this system?
Breaker size is [NEEDS VERIFICATION]. The system operates on a 208-230V circuit; confirm the exact breaker rating against the outdoor unit nameplate or installation manual in the Resources tab before wiring.
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. Installation by a licensed HVAC professional with EPA Section 608 certification is required to keep the manufacturer warranty valid.
Is the line set included, and if not, what size do I need to buy?
The line set is not included. Exact line set diameter and maximum run length are [NEEDS VERIFICATION] — confirm against the installation manual for the ASLCI4H4S18 / ASLEC4H4S18 pairing before purchasing.
Will the ceiling cassette fit between standard 16-inch on-center joists?
This is a traditional 4-way ceiling cassette, which is designed for a drop-ceiling or grid-ceiling installation rather than fitting directly between 16-inch on-center joists. Joist-bay fitment dimensions are [NEEDS VERIFICATION].
Does this system work in cold climates (low-ambient heating)?
Low-ambient heating performance and minimum operating temperature are [NEEDS VERIFICATION] in the data provided for this model.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This system is AHRI-certified as a matched ASLCI4H4S18 / ASLEC4H4S18 pair at 208-230V. Full warranty terms, brochure, and manuals are available in the "Resources (System Manuals and Warranty)" Tab above.
