Best Air Conditioners For Large Rooms

Best Air Conditioners For Large Rooms

The greater the size of the air conditioner, the better.

This is usually the best way to choose an air conditioner for a large room. You want as much cooling as possible (measured in BTUs or British Thermal Units). The best way to ensure adequate cooling for larger spaces is to select the right air conditioner (up to about 700 square feet).

Cooling capacities for large portable AC units range from 8,000 BTU to 14,000 BTU. This means that the portable air conditioners on the high end of capacity offer up to 14,000 BTUs. These large room air conditioners are available in over 100 different models.

Learn about the basic specifications of a large room air conditioner (14,000 BTU and above).

To begin, consider how many square feet the largest portable units can cover and how to determine whether they are energy efficient.

How Many BTUs of Cooling Do The Largest Portable AC Units Generate?

One room is cooled using mobile air conditioners. A small 8,000 BTU unit cools a 150-square-foot space. A large one with a cooling capacity of 14,000 BTU can cool a large room.

A maximum of 14,000 BTU cools an area ranging from 350 to 700 square feet.

Energy Efficiency Of Large Room Portable Air Conditioners (EER Rating)

The higher the current draw, the larger the unit. As a result, the energy efficiency of portable air conditioners is more important for large portable air conditioners than for small portable air conditioners.

EER ratings express the energy efficiency of large BTU air conditioners. This fundamental rating employs a total power rating in BTUs and a power rating in Watts.

The better the air conditioner, the higher the EER rating. The most energy-efficient large portable air conditioners use less power than average, which can significantly lower your cooling electricity bill.

The average EER rating for portable air conditioning units is around 8.5. For the largest portable unit, his EER rating is 10+.

Best Air Conditioners for large rooms

1. Honeywell HJ5CESWK0

The Honeywell HJ5CESWK0 is the most powerful portable air conditioner in its class, with a cooling capacity of 15,000 BTU, which is 1,000 BTUs higher than the second largest and most powerful portable AC device.Honeywell HJ5CESWK0

Furthermore, its coverage area is comparable to that of medium-sized mini-split air conditioners. The Honeywell HJ5CESWK0 has a cooling capacity of 775 square feet. In other words, it is more than a simple room air conditioner. It can even cool two or three rooms if there is enough airflow between them.

Honeywell is the manufacturer. A well-known and respected company in the HVAC industry. Honeywell is the sole manufacturer of 15,000 BTU portable AC units for rooms. Advanced engineering allows a 15,000 BTU unit to operate at 115V, which means that it can plug into a standard outlet and install a vent outside the window, and it will be cooling 15,000 BTUs in minutes. Take advantage of your abilities. Overall, the Honeywell HJ5CESWK0 is a one-of-a-kind product. It is, without a doubt, the best air conditioner for cooling multiple rooms with a total area of up to 75 m2.


DELLA B07BH7Z37F is a 14,000 BTU portable AC unit with the largest cooling capacity coverage area. The DELLA B07BH7Z37F’s added value is its ease of use, as its operation can be controlled via the DELLA app on your smartphone.DELLA B07BH7Z37F

This unit runs at 1430W at 100% cooling capacity and uses R410A refrigerant. The EER rating is higher than the 8.5 average for large portable AC units. The DELLA B07BH7Z37F uses approximately 10% less energy than a standard 14,000 BTU unit, thanks to its EER rating of 9.4.

Furthermore, the DELLA B07BH7Z37F has a fantastic dehumidification rate. This is the best air conditioner with a built-in dehumidifier, capable of dehumidifying over 150 pints per day (157 pints per day, to be exact).

Because the brand is less well-known, DELLA is not paying for it. In a portable air conditioner, you’re only paying for an insane amount of cooling power. This is a 14,000 BTU unit for less than $500.

3. Whynter ARC-14S

The Whynter ARC-14S is a well-known portable air conditioner for large rooms. This is the largest dual-hose mobile AC unit and has several advantages. The Wynter ARC-14S is the most energy-efficient portable AC unit for large spaces, with an EER rating of 10.8.Whynter ARC-14S

ARC-14S uses very little power to produce 14,000 BTU of cooling capacity. It only consumes 1,300 watts. This is an energy-efficient unit with up to 500 square feet of total cooling area and approximately 20% lower operating costs than standard units. The double hose system is responsible for these excellent specifications. The majority of portable units are single-limb devices. Although it is simple to install, the internal pressure can become negative, making it less energy efficient. Because of its double hose system, the Wynter ARC-14S is the most efficient large portable air conditioner.

The Whynter ARC-14S is widely regarded as one of the best portable AC devices, with over 4,600 positive Amazon reviews.


The BLACK+DECKER BPACT14HWT is a dependable portable air conditioner for large heated areas. In terms of cooling, that’s a 14,000 BTU unit. In the winter, you can also use the heating capacity of 11,000 BTU.BLACK+DECKER BPACT14HWT

The BLACK+DECKER BPACT14HWT is an excellent choice for a basic large-area air conditioner and heater. Rooms can be cooled to 15°C in the summer and heated to 30°C in the winter thanks to the dual cooling and heating (14,000 BTU or 11,000 BTU output). The energy efficiency is quite good. With an electrical input power of 1450W, an EER rating of 9.7 is well above average.

Since this is a classic model, the unit’s overall cost is quite low. In fact, at less than $600, the BLACK+DECKER BPACT14HWT is the most affordable large portable AC unit with a built-in heater.


This list of the best air conditioners for large rooms is based on their BTU cooling capacity.

Please contact us if you have any questions. We will respond as soon as we can.

Disclosure: We may get commissions for purchases made through links in this post.

About the author