Finding the right air conditioner for a 400 square foot space requires balancing cooling power, noise levels, and versatility. This article highlights the best air conditioners suitable for cooling rooms around 400 sq ft, including portable and window models with features like dehumidification, remote control, and smart functions. Below is a summary table of the recommended units for quick comparison.
| Product | Brand | Cooling Capacity | Type | Key Feature |
|---|---|---|---|---|
| Grelife 3-in-1 Portable Air Conditioner | Grelife | Suitable for 400 sq.ft | Portable Evaporative Cooler | 360° Oscillation, Low Noise |
| Shinco 12,000 BTU Portable Air Conditioner | Shinco | 12,000 BTU (up to 400 sq.ft) | Portable AC | 3-in-1 Cooling, Dehumidifier |
| LG 8,000 Window Air Conditioner | LG | 8,000 BTU (up to 350 sq.ft) | Window AC | Quiet Operation, Remote |
| DELLA Vario Series 9000 BTU Mini Split AC | Della | 9,000 BTU (up to 400 sq.ft) | Mini Split AC | WiFi Enabled, Heat Pump |
| 8000BTU Portable AC Units by DollarDash | DollarDash | 8,000 BTU (up to 400 sq.ft) | Portable AC | 3-in-1 Climate Control |
Content Navigation
- Grelife 3-in-1 Portable Air Conditioner for 400 Sq.Ft
- Shinco 12,000 BTU Portable AC for Rooms Up to 400 Sq.Ft
- LG 8,000 BTU Window Air Conditioner for 350 Sq.Ft Rooms
- DELLA Vario Series 9000 BTU Mini Split AC with Wifi
- DollarDash 8000BTU Portable AC for Up to 400 Sq.Ft
- Buying Guide for 400 Sq Ft Air Conditioners
Grelife 3-in-1 Portable Air Conditioner for 400 Sq.Ft
The Grelife 3-in-1 Portable Air Conditioner effectively cools spaces up to 400 sq.ft using a triple-layer cooling system with 3D honeycomb filters. It features a 1.72-gallon detachable water tank, which is larger than standard models, paired with four ice packs to accelerate cooling. The unit’s 360° oscillation and 30 ft/s turbo wind speed ensure air circulation reaches every corner.
- Three airflow modes: Turbo, Natural, Sleep — with ultra-quiet operation at 42dB
- 8-hour automatic shutoff timer for energy saving
- Dual fill ports allowing quick water refills without moving the unit
This portable cooler is suitable for bedrooms, offices, or open living spaces requiring whole-room cooling with low noise.
Shinco 12,000 BTU Portable AC for Rooms Up to 400 Sq.Ft
The Shinco 12,000 BTU Portable Air Conditioner provides robust cooling suitable for rooms up to 400 sq.ft with an adjustable temperature range between 60°F and 86°F. This unit combines cooling, dehumidifying, and fan modes, allowing for versatile use year-round.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
- Dehumidification capacity up to 43.2L/day via self-evaporating operation (no bucket required)
- Three fan speeds for customized airflow
- Quick installation with included exhaust hose and window sealing kit – no extra tools needed
This portable AC is ideal for users seeking ease of installation and multi-functionality in a compact unit.
LG 8,000 BTU Window Air Conditioner for 350 Sq.Ft Rooms
The LG 8,000 BTU Window AC offers effective cooling for rooms up to 350 sq.ft, with quiet operation as low as 53 dB on low mode. It features three cooling and fan speeds along with an Auto Cool mode to automatically maintain comfortable temperatures.
- Easy-to-use electronic controls and included remote for convenient adjustments
- Auto Restart function for recovery after power outages
- Compact window installation optimized for bedroom or small living areas
This window unit balances power and quiet performance in a sleek white design.
DELLA Vario Series 9000 BTU Mini Split AC with Wifi
The DELLA Vario Series 9000 BTU Mini Split AC is a ductless, inverter-driven system designed for rooms up to 400 sq.ft. Its heat pump feature allows both cooling and heating, and the unit is wifi-enabled for smart control via a mobile app or voice commands.
Call 888-896-7031 for Free Local HVAC Quotes – Compare and Save Today!
- Energy-efficient with 19 SEER2 rating and up to 30% power savings
- Multiple fan speed options, 4D airflow direction, and programmable timer
- Includes a full installation kit with copper pipes and 16.4ft drain piping
This mini split is ideal for users wanting integrated smart technology and year-round climate control in a quiet, efficient system.
DollarDash 8000BTU Portable AC for Up to 400 Sq.Ft
The DollarDash 8000BTU Portable Air Conditioner cools rooms up to 400 sq.ft with a multi-functional design that includes cooling, dehumidifying, and fan modes. It offers quiet operation at less than 45dB, suitable for bedrooms and small offices.
- 24-hour smart timer helps optimize run times and energy consumption
- Three airflow modes for personalized comfort settings
- Compact and efficient design suitable for dormitories, apartments, and workspaces
This model fits users who want simple, versatile climate control in a portable unit with quiet performance.
Buying Guide for 400 Sq Ft Air Conditioners
When selecting an air conditioner for a 400 square foot room, it is essential to compare multiple factors to find the best fit for your needs.
Cooling Capacity and Room Size
BTU rating directly corresponds to the cooling power, where approximately 8,000 to 12,000 BTU is suitable for up to 400 sq. ft rooms. Oversized units may cycle on and off too frequently, while undersized units may struggle to maintain desired temperatures.
Types of Air Conditioners
- Portable AC Units: Offer flexibility in placement, no permanent installation required, often include multiple functions such as fan and dehumidifier modes.
- Window AC Units: Require installation in a window but usually offer stronger cooling at a lower cost.
- Mini Split Systems: Provide quiet, efficient cooling without ductwork and offer heating capabilities but need professional installation.
- Evaporative Coolers: Ideal in dry climates, use water evaporation for cooling and tend to be more energy-efficient but less effective in humid areas.
Noise Level
Look for units with noise ratings lower than 55 dB for bedroom or office use, especially if you require undisturbed sleep or concentration.
Additional Features
- Smart Controls: WiFi connectivity, app control, or voice assistant integration adds convenience.
- Timers and Sleep Modes: Help save energy by scheduling operation and minimizing noise at night.
- Dehumidification: Useful in humid environments to reduce moisture alongside cooling.
- Installation Ease: Portable models typically plug in and require minimal setup, while window units may need mounting kits.
Energy Efficiency
Check Energy Efficiency Ratio (EER) or Seasonal Energy Efficiency Ratio (SEER) ratings for mini splits. Higher ratings indicate better energy savings and lower utility costs over time.
By considering these factors, shoppers can select an air conditioner that meets the size requirements, fits their lifestyle, and provides reliable, cost-effective cooling for 400 sq ft spaces.