This is a single-zone ductless mini split system for cooling and heating one room without ductwork. It's built for homeowners adding comfort to a bedroom, garage, or addition that central air doesn't reach, and it's designed for self-installation with a pre-charged line set.
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.
This EG4 single-zone system pairs a wall-mounted indoor head (model DGA3-12KR2) with a matched outdoor condenser (model DWA4-12KR2), rated 12,000 BTU/h for cooling and heating spaces in the 500-650 sq ft range per manufacturer data. The system carries a SEER2 rating of 22.5 and an HSPF2-4 rating of 9.7, consistent with Energy Star-caliber efficiency tiers referenced in the manufacturer's specification sheet.
System Components
- Outdoor condensing unit — Model DWA4-12KR2, rotary compressor, R32 refrigerant (27.5 oz / 0.81 L charge)
- Indoor wall-mounted air handler — Model DGA3-12KR2, 6-speed fan (Turbo/5/4/3/2/1)
- Pre-charged refrigerant line set — 16.4 ft (5 m), quick-connect self-closing companion valves
Installation Requirements & Accessories
- Voltage: 115 VAC, 60 Hz — dedicated circuit required, minimum circuit ampacity 19.05A, maximum breaker size 20A
- Pre-charged line set (16.4 ft / 5 m) is included; additional line set length beyond 16.4 ft is sold separately and requires 1/4 in liquid / 3/8 in gas valve-diameter compatible fittings
- Not compatible with 208-240VAC circuits — this 12K AC model is 115VAC only
- Outdoor wall mount bracket is NOT included with this kit and must be purchased separately if elevated mounting is needed
- Not a listed match for the EG4 Hybrid AC/DC 12K/24K solar-input model family (DWA4-ACDC1-12R2 / DGA3-ACDC1-12KR2) — this is the standard AC-only 12K unit
Pro-Installer Tip
The pre-charged copper line set on this DIY kit is a real time-saver, but it kinks easily if it's uncoiled and bent by hand around tight corners. A kinked line restricts refrigerant flow and can force the compressor to work outside its rated range, leading to nuisance fault codes or reduced cooling capacity over time. Use a line set bending mandrel to form gradual radius bends at wall penetrations and behind the indoor unit — don't fold the line sharply at 90 degrees. Even on a no-vacuum quick-connect system, treat the line set with the same respect you'd give a flared connection: protect the factory-torqued quick-connect fittings from stress, and keep total run length under the rated 49.2 ft maximum to preserve the system's rated SEER2 of 22.5.
Key Benefits
- Variable-speed inverter-driven compressor rated 12,000 BTU/h cooling and heating, with a modulating range of 3,000-12,500 BTU/h cooling and 3,000-13,000 BTU/h heating
- Indoor sound pressure as low as 29 dB(A) on lowest fan speed, up to 41.5 dB(A) on turbo
- Cold-climate heating operation down to 5°F outdoor ambient
- DIY quick-connect refrigerant line set — no vacuum pump or brazing required for the refrigerant connection
- SEER2 22.5 and HSPF2-4 9.7 efficiency ratings
- Moisture removal rated at 2.65 pt/hr (1.25 L/hr)
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (Nominal) | 12,000 | BTU/h |
| Cooling Capacity Range | 3,000 - 12,500 | BTU/h |
| Heating Capacity (Nominal) | 12,000 | BTU/h |
| Heating Capacity Range | 3,000 - 13,000 | BTU/h |
| SEER2 | 22.5 | — |
| SEER | 20.8 | — |
| EER2 | 12.6 | BTU/W |
| HSPF2-4 | 9.7 | — |
| COP | 12.25 | BTU/W |
| Rated Voltage | 115 | VAC |
| Rated Current (Cooling) | 8.4 | A |
| Rated Current (Heating) | 7.47 | A |
| Input Power Range | 190 - 1,050 | W |
| Minimum Circuit Ampacity | 19.05 | A |
| Maximum Breaker Size | 20 | A |
| Maximum Starting Current | 4 | A |
| Refrigerant Type / Charge | R32 / 27.5 oz (0.81 L) | — |
| Pre-Charged Line Set Length | 16.4 | ft |
| Max Refrigerant Pipe Length | 49.2 | ft |
| Max Elevation Between Units | 26.2 | ft |
| Liquid Valve Diameter | 1/4 | in |
| Gas Valve Diameter | 3/8 | in |
| Indoor Sound Pressure (Turbo/5/4/3/2/1) | 41.5/37.5/34.5/32/30/29 | dBA |
| Outdoor Sound Pressure (Hi/Med/Lo) | 52 | dBA |
| Operating Temperature Range (Cooling) | 32 - 131 | °F |
| Operating Temperature Range (Heating) | 5 - 86 | °F |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matched AHRI-listed pair: outdoor unit DWA4-12KR2 with indoor wall-mounted unit DGA3-12KR2
- Compatible with dedicated 115VAC, 60 Hz single-phase circuits only
- Not compatible with 208-240VAC circuits — do not confuse this model with the EG4 24K hybrid system, which runs on 208-240VAC
- Not a listed match for the EG4 Hybrid AC/DC model family (DWA4-ACDC1-12R2 / DGA3-ACDC1-12KR2), which accepts solar DC input in addition to AC
- Outdoor wall mount bracket NOT included — purchase separately if the condenser will be elevated
- Line set beyond the included 16.4 ft pre-charged length is NOT included
FAQ
What breaker size do I need for this system?
This 12K BTU EG4 system uses a maximum breaker size of 20A on a dedicated 115VAC circuit, with a minimum circuit ampacity of 19.05A.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is a true DIY kit. It uses quick-connect, self-closing companion valves on a pre-charged refrigerant line, so no vacuum pump, no special tools, and no EPA 608 certification are required for the refrigerant connection itself. A 5-year limited warranty applies to self-installation per the manufacturer; electrical hookup should still follow local code.
Is the line set included, and if not, what size do I need to buy?
A 16.4 ft (5 m) pre-charged refrigerant line set is included with the quick-connect fittings. Maximum total pipe run is 49.2 ft (15 m); any extension beyond the included 16.4 ft must be sourced separately and matched to the 1/4 in liquid and 3/8 in gas valve diameters.
Does this system work in cold climates (low-ambient heating)?
The heating operating temperature range for this unit is 5°F to 86°F, with a rated HSPF2-4 of 9.7. The cooling operating range is 32°F to 131°F.
What breaker/voltage caution should I know before ordering?
This 12K system is rated for 115VAC only. It is not compatible with 208-240VAC circuits — confirm your available circuit voltage before purchase.
Compliance & Warranty
Limited parts warranty applies to self-installation; see manual for details. The manufacturer rates this as a 5-year limited DIY warranty system using quick-connect, self-closing companion refrigerant valves — no vacuum pump or brazing tools required for the line set connection. Electrical hookup to a dedicated 115VAC circuit should still be performed in accordance with local electrical code. Refer to the "Resources (System Manuals and Warranty)" Tab above for the full manufacturer warranty document.
