Window Air Conditioning Units

Voomi Supply carries window air conditioners from 5,000 to 14,000+ BTU for residential and light-commercial use, including models with heating capability. Every order ships with Voomi's 30-day return policy and support to help confirm correct sizing before you buy.

Customer Support Image
Need Support?

Call Jack and His Team

Efficient Window Air Conditioning Units for Every Space

Window air conditioning units provide a convenient and effective solution for cooling individual rooms and small spaces. With various models available, including those with heating capabilities, you can enjoy year-round comfort tailored to your specific needs.

Versatile Options for Every Need

Whether you require heat and air conditioning window units for seasonal changes or small window air conditioning units for compact spaces, we have a wide selection to choose from. Our ductless window air conditioning options also offer a streamlined design and quieter operation, making them perfect for bedrooms or home offices.

Affordable Window AC Units for Sale

Finding the right window AC unit at a cost that fits your budget is essential. Our collection features competitively priced window AC units, ensuring you get quality cooling without breaking the bank. With various models available, you can easily find the perfect unit to suit your needs and space requirements.

Understanding the Parts of a Window AC Unit

Knowing the components of a window AC unit can help you make informed decisions about maintenance and repairs. Familiarize yourself with the essential parts of a window AC unit, from the compressor to the evaporator coils, to ensure optimal performance and longevity.

Main Parts of a Window AC Unit 

The table below outlines the primary components of a window AC unit and explains the role each part plays in the cooling process.

Component

Function

Compressor

Circulates refrigerant through the system

Evaporator Coil

Absorbs heat from indoor air

Condenser Coil

Releases heat outdoors

Fan

Moves air across the evaporator and condenser coils

Air Filter

Captures dust and airborne particles


Choosing an energy-efficient window AC unit can help reduce electricity costs while maintaining effective cooling performance. The section below explains how CEER ratings help compare the energy efficiency of different models.

Window AC Efficiency: CEER Rating

Window (and portable) AC units are rated using CEER (Combined Energy Efficiency Ratio) rather than the SEER2 rating used for central systems. CEER factors in standby power draw as well as cooling output, so it's a more complete efficiency picture for a plug-in unit. Look for the ENERGY STAR label when comparing models, it marks units that exceed the federal minimum CEER for their capacity class.

Frequently Asked Questions

Window AC units function by pulling in warm indoor air, cooling it using refrigerant-filled coils, and then blowing the cooled air back into the room. The heat extracted from the indoor air is expelled outside through the back of the unit.

Most portable AC units require a window or another exhaust option (such as a vent through a wall or ceiling) to remove hot air. However, evaporative (swamp) coolers can be used without a window, but they work best in dry climates.

Window AC units are more efficient for cooling single rooms, while central air is better for whole-home cooling. If you're only cooling one or two rooms, a window unit will be more cost-effective than running central air.

The cost to run a window AC depends on wattage, energy efficiency, and local electricity rates. On average, running a 5,000 BTU unit costs about $15–$30 per month, while a 12,000 BTU unit may cost $40–$80 per month, depending on usage.

Prices vary based on size and features:

  • Small (5,000–6,000 BTU): $150–$300
  • Medium (8,000–12,000 BTU): $300–$600
  • Large (14,000+ BTU): $500–$1,000+

With proper maintenance, window AC units typically last 10–15 years. Lifespan depends on usage, maintenance, and environmental conditions.

To clean your window AC unit:

  1. Turn off and unplug the unit.
  2. Remove and clean the air filter (wash or replace if needed).
  3. Use a vacuum or brush to remove dust from the coils and vents.
  4. Spray the coils with a coil cleaner and rinse if necessary.
  5. Clean the drain pan and drain line to prevent mold buildup.

While window AC units are weather-resistant, they are not fully waterproof. Excessive water exposure or flooding can damage internal electrical components.

Yes, when properly installed and maintained. To ensure safety:

  • Use a secure bracket to prevent falls.
  • Avoid overloading circuits to prevent electrical hazards.
  • Keep mini split filters and coils clean to prevent mold and air quality issues.

Window AC units use a moderate amount of electricity. Smaller units are relatively efficient, while larger units consume more power. Choosing an energy-efficient model (with a high EER rating) can help minimize electricity usage.

Power usage depends on size:

  • 5,000–6,000 BTU: ~400–600 watts.
  • 8,000–12,000 BTU: ~600–1,200 watts.
  • 14,000+ BTU: ~1,200–1,800+ watts.

Actual consumption varies based on efficiency and runtime.

Sizing depends on room size:

  • 150–350 sq ft: 5,000–8,000 BTU
  • 350–550 sq ft: 8,000–12,000 BTU
  • 550–1,000 sq ft: 12,000–18,000 BTU

Proper sizing ensures efficient cooling without excessive energy use.

Basic installation steps include:

  1. Position the unit securely in the window frame.
  2. Extend side panels to seal gaps.
  3. Secure the unit with brackets or screws.
  4. Seal any openings to prevent air leaks.
  5. Plug into a properly rated outlet.

For safety and stability, proper support and sealing are essential.

A window AC unit mounts in the window frame itself and vents heat directly out the back, while a portable AC sits on the floor inside the room and vents hot air through a hose run to a window or wall opening. Window units are generally more energy-efficient for the same BTU rating since they don't lose cooling capacity to hose heat gain, but portable units don't require a compatible window opening or bracket, making them easier to move between rooms.