Summers are getting incredibly hot and if your office is located in a densely packed urban center with nothing but a lone window to get some breeze in, it becomes hard to concentrate on work.

Most buildings these days are equipped with centralised heating and cooling systems, but if your office has vent troubles, maybe you should invest in supplemental air conditioners. We have come up with five of the best here, efficient and affordable enough to simply augment what you already have.

1. hOmeLabs 8,000 BTU Window Air Conditioner
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The hOmeLabs 8,000 BTU Window Air Conditioner is an energy-saving unit with a digital thermostat that can be adjusted with a remote control. For its efficient use, it is best for a room not exceeding 350 square feet.

2. Midea U Inverter Window Air Conditioner
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Midea U Inverter Window Air Conditioner is distinct AC as it allows you to open windows while it is operating. It is a U-shaped inverter air conditioner that can be easily mounted on your window sill. It also has the ability to block the noise from outside and it only makes 42 dBA of noise.

3. Frigidaire White FFRA051ZA1 Window Air Conditioner
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Frigidaire is a trusted brand when it comes to cooling systems and its FFRA051ZA1 offers the same quality. It has a 5000 BTU cooling capacity and offers quick cool/warm mode to change your room temperature fast. It also has an antibacterial filter to reduce bacteria, room odors and other airborne particles in your office.

4. Koldfront WAC12003WCO Window Air Conditioner
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The Koldfront WAC12003WCO is powerful one with its 12000 BTU capacity, appropriate for office rooms up to 550 sq ft. It is also perfect for humid workspaces as the unit has a capacity to remove 60.9 pints moisture per day.

5. SereneLife SLACHT128 Portable 4-in-1 Air Conditioner
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Finally, if you want a more temporary cooling device in your room, go for a portable unit. We recommend SereneLife SLACHT128 Portable 4-in-1 Air Conditioner that is capable of cooling a room up to 450 sq. ft. It can also be used any season as it has four operating modes – cooling, heating, dehumidifying, and fan.