This is a single-zone ductless mini split air conditioning system for cooling and heating one room without ductwork. It's built for homeowners adding comfort to a large bedroom, living area, or addition that central air doesn't reach.
The ASREM4H4S24 wall-mounted indoor head is a matched, AHRI-certified pairing with the ASRCI4H4S24 outdoor condenser, rated at 24,000 BTU/h cooling with 17 SEER efficiency and Energy Star certification. Wall-mounted heads like this one install above furniture height on an interior wall and do not require joist-specific ceiling framing. 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: ASRCI4H4S24 (24,000 BTU/h, 17 SEER, 208-230V)
- Indoor Unit: ASREM4H4S24 wall-mounted air handler
Installation Requirements & Accessories
- Voltage: 208-230V — not compatible with 115V-only circuits.
- Line set and wiring: 15ft included per this listing (exact diameter not specified in source data — [NEEDS VERIFICATION]).
- Installation by a licensed HVAC professional is required — this is not a DIY quick-connect system.
- Wall mounting bracket, disconnect box, and condensate pump (if needed) are not confirmed as included — [NEEDS VERIFICATION].
- Not a listed match for other Serene Series capacity classes (9K/12K/18K use different ODU/IDU model numbers).
Pro-Installer Tip
Flare connections on 24,000 BTU systems carry higher refrigerant charge and higher line pressure than smaller classes, so an undersized or improperly torqued flare nut is more likely to seep gas over time. A slow leak here shows up months later as reduced capacity or an "E1"-style communication/protection fault, not an immediate failure. Torque every flare joint to the manufacturer's spec with a digital torque wrench, not by feel, and pull the system down below 500 microns with a calibrated micron gauge before opening the service valves. This isn't optional — EPA Section 608 requires a certified technician to handle refrigerant charging and recovery on a system this size.
Key Benefits
- 17 SEER efficiency rating for this capacity class
- Energy Star certified
- AHRI-certified matched indoor/outdoor pairing
- Wall-mounted indoor unit for straightforward interior placement
- 208-230V dedicated circuit design for 24,000 BTU load
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity | 24,000 | BTU/h |
| SEER2 | 17 | SEER |
| Voltage | 208-230 | V |
| Indoor Unit Architecture | Wall Mounted | — |
| Zone Count | 1 | — |
| Outdoor Unit Model | ASRCI4H4S24 | — |
| Indoor Unit Model | ASREM4H4S24 | — |
| Energy Star Certified | Yes | — |
| AHRI Certified | Yes | — |
| DIY Status | No — Professional Installation Required | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- The ASREM4H4S24 indoor head is AHRI-certified only when paired with the ASRCI4H4S24 outdoor condenser.
- Compatible with dedicated 208-230V single-phase circuits.
- Not compatible with 115V-only circuits.
- Not a listed match for other Serene Series capacity classes (9K, 12K, 18K use different ODU/IDU model number pairs).
- Wall-mounted architecture — no ceiling joist bay or drop-ceiling framing required.
FAQ
What breaker size do I need for this system?
Breaker size is not specified in the manufacturer data provided for this model. [NEEDS VERIFICATION] Refer to the unit's nameplate or the Resources tab for the exact circuit requirement 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. The Serene Series uses standard flare connections and requires a licensed HVAC professional to vacuum the line set and charge the system per manufacturer requirements.
Is the line set included, and if not, what size do I need to buy?
This listing title indicates a 15ft line set and wiring are included. Exact line diameter (liquid/suction) is not specified in the manufacturer data provided. [NEEDS VERIFICATION]
Does this system work in cold climates (low-ambient heating)?
Low-ambient heating performance and operating temperature ranges 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. Warranty term length is not specified in the manufacturer data provided — [NEEDS VERIFICATION]. This system is AHRI-certified and Energy Star certified as a matched ASRCI4H4S24/ASREM4H4S24 pairing.
