Keystone 14,000 BTU Window Air Conditioner and vs MilleLoom Smart 6000 BTU Window Air Conditioner with WiFi,
Updated July 2026 — Keystone 14,000 BTU Window Air Conditioner and wins on price and cooling btu, MilleLoom Smart 6000 BTU Window Air Conditioner with WiFi, wins on noise level.
The Keystone 14 offers superior cooling capacity and features for larger spaces, while the Smart 6000 BTU is more budget-friendly and easier to install.
Why Keystone 14,000 BTU Window Air Conditioner and is better
Cooling Capacity
14,000 BTU vs 6,000 BTU
Energy Efficiency
More energy-saving features
Room Size
Cools larger areas up to 650 sq ft
Why MilleLoom Smart 6000 BTU Window Air Conditioner with WiFi, is better
Price
$399.99 vs $170.99
Noise Levels
Operates at 50 dB
Smart Features
WiFi-enabled control
Overall score
Specifications
| Spec | Keystone 14,000 BTU Window Air Conditioner and | MilleLoom Smart 6000 BTU Window Air Conditioner with WiFi, |
|---|---|---|
| Brand | Keystone | MilleLoom |
| Remote Control | Yes | Yes |
| WiFi Capability | No | Yes |
| Dehumidifier | Yes | No |
| Installation | Standard | Easy |
Dimension comparison
Price Comparison
The Keystone 14 is priced at $399.99, making it significantly more expensive than the Smart 6000 BTU, which retails for $170.99. This means the Keystone unit is about 134% more expensive than the Smart model. The price difference can be a substantial factor for budget-conscious consumers looking for an efficient cooling solution. While the Keystone offers higher cooling capacity, the Smart model's lower price may appeal to those who need a more economical option for smaller spaces.
Cooling Capacity
The Keystone 14 boasts a powerful 14,000 BTU cooling capacity, ideal for rooms up to 650 square feet. In contrast, the Smart 6000 BTU unit is designed for smaller spaces of up to 350 square feet. This significant difference in capacity means that the Keystone can effectively cool larger areas, making it suitable for apartments and larger living rooms, while the Smart model is better suited for bedrooms or smaller offices. Therefore, if cooling a larger area is a priority, the Keystone is the superior choice.
Energy Efficiency
Energy efficiency is an essential aspect of any air conditioning unit, and both products offer features aimed at reducing energy consumption. The Keystone 14 includes Energy Saver and Sleep modes, which help to lower electricity bills by optimizing energy use. Meanwhile, the Smart 6000 BTU unit also provides a Sleep Mode, which gradually increases the temperature at night for added comfort and efficiency. However, without specific energy ratings provided, it's difficult to quantify which unit is more energy efficient. Overall, both models are designed to save energy, but the Keystone's additional features may offer more comprehensive savings for larger spaces.
Installation Process
Installation is straightforward for both models, but the Smart 6000 BTU has a slight edge with its easy-to-install quick-snap bracket and a design that accommodates various window types. This user-friendly installation process ensures that even those with minimal DIY experience can set it up in no time. The Keystone does not specify installation details, but generally, window units require similar steps. Thus, for those who prioritize ease of installation, the Smart 6000 may be the more attractive option.
Noise Levels
The Smart 6000 BTU operates at sound levels as low as 50 dB, which makes it ultra-quiet and suitable for uninterrupted sleep or work. The Keystone 14 does not specify its noise level, which can be a concern for potential users. For individuals sensitive to noise or those looking for a unit to use in bedrooms or quiet spaces, the Smart model's quiet operation is a clear advantage, providing a more tranquil environment.
Smart Features
Smart technology is a standout feature of the Smart 6000 BTU, allowing users to control the unit remotely via the Smarthq app. This WiFi-enabled capability offers added convenience and modernity, particularly for those who enjoy managing their home appliances through smart devices. The Keystone 14 lacks such connectivity features, focusing instead on traditional remote control functionality. For tech-savvy consumers looking for advanced features, the Smart model is the better choice.
Maintenance Ease
Both air conditioners feature easy-to-clean filters, but the Smart 6000 BTU takes a more user-friendly approach with its slide-out filter design, allowing for quick access and maintenance without disassembling the unit. The Keystone 14 does have a washable filter and a check filter indicator but does not specify how accessible it is for cleaning. Thus, for those who prioritize low-maintenance options, the Smart 6000 may be the more appealing choice.
Which should you buy?
Deciding between the Keystone 14 and the Smart 6000 BTU ultimately depends on your specific needs. If you require a powerful unit for larger spaces and are willing to invest more, the Keystone offers superior cooling capacity and energy-saving features. However, if you're looking for a budget-friendly, smart-enabled, and easy-to-install air conditioner for smaller areas, the Smart 6000 BTU stands out as a more practical choice. Each unit has its strengths, so the right choice will depend on your individual cooling requirements and preferences.

