LG 5.0 cu. ft. Mega Capacity Smart Front Load vs LG WM3400CW 4.5 cu ft Front-Load Washer –
Updated July 2026 — LG 5.0 cu. ft. Mega Capacity Smart Front Load wins on convenience and energy, LG WM3400CW 4.5 cu ft Front-Load Washer – wins on price and noise.
The LG 5.0 cu. ft. Mega Capacity combo offers more convenience and energy efficiency, while the LG WM3400CW provides superior washing technology at a lower price.
Why LG 5.0 cu. ft. Mega Capacity Smart Front Load is better
Capacity
5.0 cu. ft. vs 4.5 cu. ft.
Convenience
All-in-one washer and dryer combo
Energy Efficiency
Uses up to 60% less energy
Why LG WM3400CW 4.5 cu ft Front-Load Washer – is better
Price
$729.00 vs $1,651.96
Noise Level
LoDecibel Quiet Operation
Cleaning Technology
6Motion Technology for optimized cleaning
Overall score
Specifications
| Spec | LG 5.0 cu. ft. Mega Capacity Smart Front Load | LG WM3400CW 4.5 cu ft Front-Load Washer – |
|---|---|---|
| Current Price | $1,651.96 | $729.00 |
| Capacity | 5.0 cu. ft. | 4.5 cu. ft. |
| Energy Star | Yes | Yes |
| Smart Features | Yes | No |
| Noise Level | Not specified | LoDecibel |
Dimension comparison
Overview of the Products
The LG 5.0 cu. ft. Mega Capacity Smart Front Load Electric All-in-One Washer Dryer Combo is priced at $1,651.96, while the LG WM3400CW 4.5 cu. ft Front-Load Washer costs $729.00, making the washer about 56% cheaper. Both products come from LG and are designed to provide efficient laundry solutions, but they cater to different needs. The all-in-one combo is perfect for those with limited space, while the standalone washer focuses on providing high-efficiency washing capabilities.
Capacity and Design
The LG 5.0 cu. ft. Mega Capacity combo offers a larger capacity compared to the LG WM3400CW, which has a 4.5 cu. ft. capacity. This difference means that the combo can handle larger loads, including bulky items like king-size comforters, making it ideal for families or those with substantial laundry demands. The combo's design allows users to wash and dry in a single unit, eliminating the need for a separate dryer. In contrast, the standalone washer is optimized for efficient washing but requires a separate dryer, which may not suit users with limited laundry space.
Convenience Features
The LG 5.0 cu. ft. Mega Capacity combo excels in convenience features, including smart technology integration with LG ThinQ. This allows users to monitor cycles remotely, receive notifications, and download additional wash programs. The 120 V plug-in convenience of the combo makes it easy to set up in various locations without specialized wiring. On the other hand, the LG WM3400CW focuses on traditional washing capabilities, offering features like 6Motion Technology and LoDecibel Quiet Operation, but lacks the advanced smart features that the combo provides.
Energy Efficiency
The LG 5.0 cu. ft. Mega Capacity combo is recognized as the most energy-efficient combo according to ENERGY STAR, using up to 60% less energy with every load compared to similarly-sized vented LG dryers. This efficiency is crucial for environmentally conscious consumers looking to save on utility bills. The LG WM3400CW is also ENERGY STAR certified, promoting efficient energy and water use, but it does not match the combo's level of energy savings. Thus, while both are energy-efficient, the all-in-one combo stands out in this category.
Noise Levels
The LG WM3400CW is designed with LoDecibel Quiet Operation, making it particularly suitable for homes or apartments where noise levels can be a concern. Additionally, its TrueBalance Anti-Vibration System minimizes vibrations during high-speed spins, contributing to a quieter laundry experience. In contrast, the LG 5.0 cu. ft. Mega Capacity combo does not specifically mention noise reduction features, which could make it less desirable for users sensitive to sound. For those prioritizing a quiet operation, the standalone washer may be the better choice.
Performance and Cleaning Technology
In terms of cleaning performance, the LG WM3400CW employs 6Motion Technology, which utilizes up to six different wash motions for optimized cleaning while reducing wear on fabrics. This technology is designed to deliver a superior cleaning experience, especially for delicate items. The LG 5.0 cu. ft. Mega Capacity combo, although capable of handling substantial loads, focuses more on the convenience of washing and drying in one unit rather than specialized cleaning technologies. For users who prioritize washing performance and fabric care, the standalone washer may offer an advantage.
Pricing and Value
The LG 5.0 cu. ft. Mega Capacity combo is priced at $1,651.96, significantly higher than the LG WM3400CW's $729.00 price tag. This makes the washer about 56% cheaper, presenting a more budget-friendly option for consumers. While the combo offers unique features and conveniences, the standalone washer provides excellent value for those who do not require a drying function in the same unit. Therefore, consumers must weigh their need for advanced features against their budget constraints.
Which should you buy?
Ultimately, the choice between the LG 5.0 cu. ft. Mega Capacity Smart Front Load Electric All-in-One Washer Dryer Combo and the LG WM3400CW 4.5 cu. ft Front-Load Washer hinges on individual needs. If convenience, energy efficiency, and space-saving design are your priorities, the all-in-one combo is an excellent choice despite its higher price. Conversely, if you seek a more economical option with superior washing technology and quieter operation, the LG WM3400CW is the better fit. Each product excels in its domain, making them both worthy contenders in the washing machine market.

