What type of electrical outlet do the 18,000 and 23,500 BTU units require?

Both the 18k (LW1822IVSM) and 23.5k (LW2422IVSM) Dual Inverter units operate on a dedicated 208/230V 15-Amp circuit using a NEMA 6-15P tandem plug (and are also compatible with 208/230V 20-Amp NEMA 6-20R receptacles). If you need confirmation, review our visual 115V vs 230V Plug Guide or our technicians can assess it on-site.

Do large 112 lb window units require an exterior support bracket?

Yes, for 112 lb Slide In-Out chassis units, a heavy-duty exterior support bracket is strongly recommended to relieve structural load from your window sill and framing. Our specialist technicians evaluate your wall construction on-site during installation ($0 upfront booking deposit).

How fast can I get one of these units on Oahu?

Our 18,000 BTU and 23,500 BTU models are in stock now at our Waipahu Central Warehouse (94-150 Leoleo St. #203). You can select Free Waipahu Warehouse Pickup (by appointment, subject to scheduling & inventory availability) OR $50 Flat Delivery across Honolulu, Metro, Central, Windward, and West Oahu.

Do these high-capacity models qualify for the Hawaii Energy cash rebate?

Yes! Both ENERGY STAR® rated LG Dual Inverters qualify for the official $45 Hawaii Energy cash rebate. Every purchase includes our pre-approved official Hawaii Energy application form PDF ready to submit.

20 High-Capacity Units In Stock • Waipahu Warehouse

Large Room Window AC Oahu

18,000 BTU & 23,500 BTU LG Dual Inverters • Open-Concept Power

Cool open living rooms, vaulted ceilings, and whole floorplans with heavy-duty 208/230V LG Dual Inverters. In-stock for free Waipahu warehouse pickup by appointment or $50 island delivery. Includes pre-approved $45 Hawaii Energy cash rebate PDF.

The Oahu Open-Concept Cost Reality

Cool Your Entire Open Living Room for $925–$1,025

Our heavy-duty 18,000 & 23,500 BTU LG Dual Inverters pull 4.2 to 5.6 pints of moisture per hour, circulate air up to 40 feet across open floor plans, and slash cooling energy by up to 40% under Hawaiian Electric's ~44.2¢/kWh baseline.

HECO Power Reduction

Up to 40%

Lower Electricity Use vs Standard Rotary Units

Check 230V Plug Compatibility

In Stock • Waipahu Warehouse

208/230V • NEMA 6-15P

Cooling Power

18,000 BTU

Voltage

208/230V

Moisture Out

4.2 Pts/Hr

Rebate PDF

$45 Cash

LW1822IVSM • Open Floor Plan Titan

LG Dual Inverter 18,000 BTU (LW1822IVSM)

Engineered for vaulted ceilings and open living-dining areas. Maximum vertical airflow momentum eliminates hot pockets, while LG Dual Inverter technology variable compressor speed saves up to 40% on electricity.

Waipahu Warehouse Direct Price

$925

In Stock (5 Available)Ready for Pickup/Delivery

$45 Hawaii Energy Cash Rebate applies to this Energy Star model.

View PDF

Free Waipahu Pickup (by appt)

$50 Flat Island Delivery

Need Professional Installation?$0 Upfront Deposit

Our specialist technicians provide cantilever exterior bracket anchoring, laser 3/8" trade-wind slope leveling, and custom window retrofits. Pay the technician only after installation is complete and cooling cold.

Schedule Installation Service

High-Capacity LG Dual Inverter Specifications

Feature / Specification	18,000 BTU (LW1822IVSM)	23,500 BTU (LW2422IVSM)
Cooling Square Footage	Up to 1,000 sq. ft. (600 sq. ft. Oahu)	Up to 1,440 sq. ft. (800 sq. ft. Oahu)
Electrical Circuit	208/230V / 15 Amp (NEMA 6-15P)	208/230V / 15 Amp (NEMA 6-15P)
Dehumidification Capacity	4.2 Pints / Hour	5.6 Pints / Hour
Unit Weight	112 lbs	112 lbs
Smart WiFi Control	LG ThinQ® & Voice Compatible	LG ThinQ® & Voice Compatible
Hawaii Energy Cash Rebate	$45 Instant / Mail-In	$45 Instant / Mail-In
Waipahu Warehouse Stock	5 Units Available	15 Units Available

Frequently Asked Questions

Everything you need to know about heavy-duty Oahu window ACs

An in-stock LG Dual Inverter 18k ($925) or 23.5k ($1,025) delivers high-volume cooling with up to 500 CFM air throw and variable-speed twin-rotary compression, cooling entire living areas, open floor plans, and high-ceiling spaces up to 1,440 sq ft while cutting HECO electricity consumption by up to 40%.

Ready for Heavy-Duty Cooling in Your Oahu Home?

Pick up your unit today at our Waipahu warehouse (by appointment) or have it delivered across Honolulu, Metro, Central, Windward, and West Oahu for $50 flat.

Call Warehouse: (808) 488-1111

Live Waipahu Warehouse Stock • $45 HECO Rebate Eligible