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, office, or small addition of roughly 500 square feet, and it's designed to be installed without brazing or a vacuum pump.
The EG4 9K AC Mini-Split is a wall-mounted, single-zone R32 heat pump system built around EG4's Plug-N-Cool DIY platform, matching outdoor model DWA4-09KR2 with indoor model DGA3-09KR2 as an AHRI-listed pair per the manufacturer's spec sheet. It's sized for rooms in the roughly 500 square foot range. 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
- 1x Outdoor Condensing Unit — Model DWA4-09KR2, rotary compressor, R32 refrigerant
- 1x Indoor Wall-Mounted Air Handler — Model DGA3-09KR2
- Remote control (included per accessories list)
- 16.4 ft. (5 m) pre-charged copper line set (installation copper kit)
- 18 AWG (4-stranded) signal/control cable
Installation Requirements & Accessories
- Voltage: 115 VAC, 60 Hz dedicated circuit — this is NOT compatible with 208/230V circuits
- Maximum breaker size: 20A; minimum circuit ampacity 19.05A
- Pre-charged line set (16.4 ft. / 5 m) is included with this DIY kit — no separate purchase required for standard runs
- Runs beyond 16.4 ft. require additional R32 charge (0.16 oz. per extra foot) up to a 49.2 ft. maximum pipe length; max elevation between units is 26.2 ft.
- Liquid valve: 1/4 in.; gas valve: 3/8 in.
- Outdoor unit wall mounting bracket is NOT included in this SKU
- Not a listed match for other EG4 indoor/outdoor model families outside DWA4-09KR2 / DGA3-09KR2
Pro-Installer Tip
Even on a quick-connect, pre-charged system, the copper line set can kink at tight bends near the wall penetration, restricting refrigerant flow and starving the compressor. A kinked line reduces charge flow the same way a pinched valve does, which shows up later as reduced capacity or a frozen coil. Use a line set bending mandrel (not your hands) to form bends at the wall entry and behind the indoor unit, keeping the bend radius gradual. This preserves the factory charge integrity EG4 lists at 21.2 oz. (0.63 L) for the 9K system and protects the SEER2 25 efficiency rating the unit is designed to deliver — a kinked or crimped line set is one of the fastest ways to void the 5-year limited warranty on a DIY install.
Key Benefits
- Inverter-driven compressor delivers variable-speed cooling and heating capacity (3,000–10,000 BTU/h cooling range, 3,000–11,000 BTU/h heating range)
- Quiet indoor operation, as low as 29 dBA on the lowest fan speed
- Low-ambient heating rated down to 5°F outdoor temperature
- SEER2 25 / HSPF2 10.5 — Energy Star-class efficiency per manufacturer data
- No-vacuum, quick-connect refrigerant fittings for straightforward self-installation
- R32 refrigerant with a factory-set 16.4 ft. pre-charged line set
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (Nominal) | 9,000 | BTU/h |
| Cooling Capacity Range | 3,000 - 10,000 | BTU/h |
| Heating Capacity (Nominal) | 9,500 | BTU/h |
| Heating Capacity Range | 3,000 - 11,000 | BTU/h |
| SEER2 | 25 | - |
| SEER | 23.8 | - |
| EER2 | 14.5 | - |
| HSPF2 | 10.5 | - |
| COP (Heating) | 14.4 | - |
| Rated Voltage | 115 | VAC |
| Rated Current - Cooling | 5.9 | A |
| Rated Current - Heating | 6.37 | A |
| Minimum Circuit Ampacity | 19.05 | A |
| Maximum Breaker Size | 20 | A |
| Frequency | 60 | Hz |
| Refrigerant Type / Charge | R32 / 21.2 | oz |
| 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 |
| Outdoor Sound Pressure | 52 | dB(A) |
| Indoor Sound Pressure (Turbo/5/4/3/2/1) | 41.5/37.5/34.5/32/30/29 | dB(A) |
| Operating Temperature (Cooling, Outdoor Unit) | 32 - 131 | °F |
| Operating Temperature (Heating, Outdoor Unit) | 5 - 86 | °F |
| Outdoor Unit Dimensions (W x D x H) | 31.6 x 12.7 x 22.2 | in |
| Outdoor Unit Net Weight | 62.9 | lbs |
| Indoor Unit Dimensions (W x D x H) | 33.07 x 8.07 x 11.61 | in |
| Indoor Unit Weight | 20.9 | lbs |
| Signal Cable | 18 AWG, 4-Stranded | - |
| Warranty | 5-year limited | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matched, AHRI-listed pair: outdoor DWA4-09KR2 with indoor DGA3-09KR2 only.
- Compatible with dedicated 115 VAC, 60 Hz circuits, 20A maximum breaker.
- NOT compatible with 208/230V single-phase circuits.
- Pre-charged line set (16.4 ft.) is included with this DIY kit; longer runs require additional R32 refrigerant, purchased separately, up to a 49.2 ft. maximum.
- Outdoor wall mounting bracket is NOT included with this SKU.
- Wall-mounted indoor unit architecture — not a ceiling cassette or ducted configuration.
FAQ
What breaker size do I need for this system?
This 9,000 BTU EG4 system requires a maximum breaker size of 20A on a dedicated 115 VAC circuit. Minimum circuit ampacity is rated at 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 set, so no brazing, no vacuum pump, and no EPA 608 certification are required for the refrigerant connection. A 5-year limited warranty applies; see the manufacturer's warranty registration page for full terms.
Is the line set included, and if not, what size do I need to buy?
A pre-charged copper line set is included with this system, factory-charged for 16.4 ft. (5 m) of run. The liquid line is 1/4 in. and the gas line is 3/8 in. Runs longer than 16.4 ft. require an additional 0.16 oz. (4.73 ml) of R32 per extra foot, up to a maximum total pipe length of 49.2 ft. (15 m).
Does this system work in cold climates (low-ambient heating)?
The outdoor unit is rated for heating operation down to 5°F (-15°C) and cooling operation up to 131°F (55°C) ambient. HSPF2 is rated at 10.5.
Compliance & Warranty
This system carries a 5-year limited warranty from EG4 Electronics. Limited parts warranty applies to self-installation; see manual for details. Warranty registration is completed through the manufacturer's website. Because this is a quick-connect DIY system, no EPA Section 608 certification is required for the refrigerant line connection itself; if any brazing, additional charge, or system modification beyond the pre-charged quick-connect fittings is performed, that work falls under standard EPA 608 refrigerant handling requirements.
