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Last updated: 2nd July, 2024


Best Bedroom Air Conditioning Units

Best Bedroom Air Conditioning Units

Key takeaways

  • The best air conditioning units balance cost, efficiency, and user needs.
  • Prices range from £200 for basic models to higher costs for advanced systems.
  • High SEER ratings are key for energy efficiency and long-term savings.

When outfitting a bedroom with an air conditioner, it's crucial to understand the types available, the importance of the correct BTU rating, and the features that can enhance comfort and efficiency.

Choosing the best bedroom air conditioning unit requires balancing cost, efficiency, and comfort. As the UK braves increasingly erratic weather patterns, a reliable air conditioner isn't just a luxury—it's a year-round necessity for many.

In 2024, the market for bedroom air conditioning units reflects technological advancements and a growing demand for energy-efficient models. 

Consumers now have a multitude of options, from portable units to mini-split systems, each promising different benefits.

Whether one is looking for a cost-effective solution or the quietest option available, the key is to match personal needs to the features and capabilities of the latest models.

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Understanding the price range is crucial before making an investment in a bedroom air conditioning unit. Prices can vary significantly; portable models can be found in the region of £200 to £600, whereas those seeking the advanced features of mini-split systems must be prepared for a higher initial outlay. 

Moreover, energy efficiency plays a pivotal role, not just in reducing carbon footprints but also in cutting down long-term costs. Some units now boast impressive SEER (Seasonal Energy Efficiency Ratio) ratings, which directly translate to lower electricity bills.

Understanding Air Conditioning

When outfitting a bedroom with an air conditioner, it's crucial to understand the types available, the importance of the correct BTU rating, and the features that can enhance comfort and efficiency.

Types of Air Conditioners

In the UK, homeowners commonly encounter several types of air conditioners, each catering to different needs.

Portable air conditioners are flexible and can be moved from room to room, offering convenience for small spaces. Window units fit into a window frame, providing a more permanent solution with efficient cooling.

For those who prefer a unit out of sight, split air conditioners involve an indoor unit connected to an outdoor compressor, boasting a quieter operation and powerful cooling capacity.

Lastly, air coolers use evaporative cooling, which is more suitable for areas with a dry climate but less effective in humid conditions.

Selecting the Right Size and BTU Rating

To maintain a comfortable environment, selecting an air conditioner with the proper BTU (British Thermal Units) rating is key. This rating reflects the unit's power and its ability to remove heat from a room.

As a rough guide, for a room measuring 150 square feet, a unit with at least 5,000 BTUs is recommended, scaling up to 12,000 BTUs for spaces around 400 square feet. It's a delicate balance—too low, and the unit won't cool effectively; too high, and it could result in excess moisture and energy inefficiency.

Key Features of Bedroom AC Units

Modern bedroom AC units come with features designed to enhance user comfort and minimise running costs. Important features include:

  • Variable Fan Speeds: Adjusting the airflow to suit one's preference.

  • Energy Efficiency: Look for a high EER (Energy Efficiency Rating) to keep running costs down.

  • Timers/Remote Control: For ease of use and convenience, especially when pre-cooling a room.

  • Dehumidifier Mode: Essential in the UK to manage moisture levels and improve air quality.

  • Heating Mode: Some units double as a heater, providing year-round climate control.

  • Quiet Operation: Particularly for the bedroom, a low noise level ensures a good night's rest.

  • Compact Size: An important consideration for small UK bedrooms, ensuring the unit fits comfortably within the space without being obtrusive.

By considering these specifics, purchasers can select a bedroom air conditioning unit that provides efficient cooling, fits their room's size, and includes features that contribute to a serene sleep environment.

Costs and Energy Efficiency

When selecting an air conditioning unit for a bedroom, it is imperative to balance the upfront cost with long-term energy savings. The efficiency of the unit translates directly into reduced running costs, making it a factor worth careful consideration.

Comparing Energy Efficiency Ratings

The performance of air conditioning units is often gauged by energy efficiency ratings such as EER (Energy Efficiency Ratio) and SEER (Seasonal Energy Efficiency Ratio). EER signifies the cooling output divided by power consumption, with a higher EER denoting a more energy-efficient unit.

A model's SEER rating extends this concept over a typical cooling season, providing a broader view of its efficiency. In the UK, the Energy Rating system ranges from G (least efficient) to A+++ (most efficient), helping consumers readily identify the most energy-efficient models.

Modern air conditioners may also feature energy-saving functions like programmable timers or sleep modes to enhance efficiency further.

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Understanding Running Costs

The cost to run an air conditioning unit is affected by factors like the unit's efficiency, the local climate, and the current energy prices. An energy-efficient model, while perhaps more expensive initially, can yield considerable savings on electricity bills.

Running costs of air conditioners can be estimated by considering the unit's power consumption in kilowatts per hour (kWh) and the local cost per kWh of electricity. For instance, a unit with a BTU (British Thermal Unit) suitable for a double bedroom may cost approximately £2,250 - £3,000 for installation with varying efficiency-based running costs.

As energy prices fluctuate, units with a high SEER rating can mitigate the impact of price increases on the household budget.

Installation and Maintenance

Setting up an air conditioning unit in your bedroom not only provides a comfortable environment but also involves careful consideration of installation and ongoing maintenance. Adequate ventilation and a tightly sealed window will reduce noise levels and ensure efficient operation.

Setting Up Your AC Unit

When installing an AC unit, dimensions and proper ventilation are key. For small rooms, a compact model will be less obtrusive yet effective. It's imperative that the outdoor unit is positioned with enough airspace to expel heat and maintain system efficiency.

Quick Checklist:

  • Ensure compatibility with room size

  • Install the outdoor unit in a well-ventilated space

  • Check for a secure window seal to prevent energy loss

Routine Cleaning and Care

Regular cleaning enhances the performance and longevity of your AC unit. Filters, easily clogged by dust and pollen, require monthly attention.

Maintenance Tips:

  • Filters: Clean or replace monthly to prevent airflow blockage

  • Vents: Dust off vents bi-weekly to maintain unimpeded air distribution

  • Outdoor Unit: Inspect seasonally; remove any debris to prevent blockages

An unobstructed air pathway preserves the unit's efficiency and keeps operational noise to a minimum.

Troubleshooting Common Issues

A warranty often covers various malfunctions, but some issues can be resolved without professional help. Strange noises often hint at blockages or loose components, which can be inspected and remedied.

Problem Solving Table:


Likely Cause

Home Solution

Reduced airflow

Clogged filter

Clean or replace the filter

Odd noises

Loose parts or debris near the outdoor unit

Tighten components or clear debris

Inadequate cooling

Poor insulation or ventilation

Enhance insulation or check ventilation

Remember, a well-insulated room retains cool air more effectively, reinforcing the AC's performance.

Feature-Focused Considerations

When selecting the best bedroom air conditioning units, it's essential to consider specific features impacting comfort and convenience. The right choices can significantly enhance your sleeping environment and integrate seamlessly with modern smart homes.

Noise Considerations for Better Sleep

Quiet operation is paramount for an undisturbed night's rest. Bedroom air conditioners should ideally operate below 35 decibels, similar to the sound of a whisper. Look for models boasting 'sleep mode' features, which not only reduce noise levels but also conserve energy at night.

  • Example: The Amcor SF8000E priced at £300 has a dedicated sleep mode for quieter operation.

Smart Features and Home Integration

Modern air conditioners come with smart-home integration, enabling remote adjustments via a smartphone app. Compatibility with Amazon Alexa or Google Assistant allows for voice-activated control, which adds a layer of convenience for users.

  • Smart Integration: AEG ChillFlex Pro AXP26U339CW, retailing at about £510, supports integration with smart home ecosystems.

Additional Functionalities: Timers, Fan Speeds, and Modes

Beyond cooling, look for units that offer:

  • Timers: Setting an air conditioner to power down automatically can save energy and maintain an ideal temperature while you sleep.

  • Fan Speeds: Multiple fan speeds give you control over airflow and noise.

  • Modes: Features like a dehumidifier can help manage dust and humidity, creating a more comfortable sleeping environment.

  • Versatile Model: DeLonghi Pinguino PAC EL112, with its range of modes and LED display, provides extensive controllability and information at a glance.

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Product Selection Guide

Selecting an air conditioning unit for the bedroom in 2024 involves considering the latest models, evaluating your budget, and understanding the warranties and customer service offered by various brands.

Top Models for 2024

The current year boasts innovative models tailored for bedroom comfort. Among the recognised units are the Midea MAW08V1QWT, praised for its quiet operation and the Tosot Tranquility series which balances efficiency with noise reduction. AEG's ChillFlex Pro(£510) from John Lewis features smart technology, compatible with Amazon Alexa, enhancing user experience with voice commands.

The Daikin Sensira air conditioner stands out for its energy efficiency, quiet operation, and flexible heating and cooling options, making it ideal for both residential and commercial use​​.

The Worcester Bosch Climate 3000i air conditioner is praised for its efficient heating and cooling, advanced air purification features, and user-friendly design, catering well to both home and business settings​​.

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Budget Considerations

When it comes to pricing, options vary widely. Budget-friendly units like the Inventor Chilly 9000BTU can be found for as little as £200, offering a balance of efficiency and affordability. Mid-range models, often featured in Which? Best Buys, range from £300 to £600, with features scaling accordingly.

Warranties and Customer Service

Warranty periods typically span from one to five years, with comprehensive coverage for parts and labour. Retailers like John Lewis are renowned for their customer service and extended warranty options, ensuring peace of mind when investing in a unit. It's imperative to read the terms, as warranties may vary between brands and retailers.

Health and Environmental Impact

When integrating an air conditioning unit into a bedroom setting, it is essential to consider the unit's ability to enhance air quality and its compatibility with environmentally conscious practices.

Reducing Allergens and Dust

Air conditioning units improve the bedroom environment by filtering out airborne particles. Energy-efficient models with high-quality filtration systems are adept at trapping allergens and dust, creating a considerably more comfortable environment. For individuals prone to allergies, selecting a unit with a HEPA (High-Efficiency Particulate Air) filter can lead to a marked reduction in the presence of irritants.

  • Recommended Feature: HEPA filters for significant reduction of airborne particles.

  • Maintenance Tip: Regular filter cleaning to sustain optimal performance.

Eco-Friendly Options

The quest for an eco-friendly air conditioning unit rests on finding options that strike a balance between comfort and reducing environmental impact. Units labelled with an Energy Star rating generally use 10% less energy compared to conventional models, lessening their carbon footprint. Furthermore, opting for units that utilise refrigerants with a lower Global Warming Potential (GWP) contributes positively to environmental efforts.

  • Energy-Efficient Traits: Energy Star rating, programmable settings, and inverter technology.

  • Refrigerant Consideration: Seek refrigerants such as R32 over R410A for a lower GWP.

By choosing energy-efficient air conditioners and maintaining them adequately, users can enjoy a fresher bedroom atmosphere without compromising their health or the well-being of the planet.

Remember: Air Con Units can Heat as Well as Cool

Many are unaware that air conditioners like the Daikin Sensira are not just for cooling. They're quite capable of heating spaces efficiently during colder months.

Conclusion - AC installation with iHeat

When selecting the Daikin Sensira or Worcester Bosch Climate 3000i Air Con for your home, you are choosing a unit renowned for its efficiency and performance. iHeat's installation service enhances the appeal of this air conditioning system, offering a streamlined process tailored to the needs of residential properties.

Daikin Sensira's features at a glance:

  • Seasonal Efficiency: Achieves A to A++ ratings in cooling and A to A+ in heating, indicating superior energy performance.

  • User Control: Optional Onecta app compatibility allows for remote operation.

  • Quiet Operation: Noise levels can be as low as 20 dBA, ensuring minimal disruption.

iHeat - fast, easy and safe

  • Answer a few simple questions about your home (don’t worry, it only takes 60 seconds).

  • Choose from our range of ac units to cool and heat your home.

  • Pop the kettle on, we’ll take it from here. Our expert engineers will install your new ac unit. Thanks to our fully inclusive after care, you won't have to worry about a thing.

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Frequently Asked Questions

What type of AC is best for bedroom?

For bedrooms, quiet operation and controlled cooling are essential. Inverter air conditioning units, like the Midea 8,000 BTU U-Shaped Smart Inverter Window Air Conditioner, are often recommended due to their energy efficiency and ultra-quiet functionality, suitable for up to 32 square meters of space.

Can you put an AC unit in a bedroom?

Yes, air conditioning units can be installed in bedrooms. Options include portable air conditioners, mini-split systems, and window units. It is crucial to ensure proper installation and ventilation to maximize performance and comfort.

Which UK best air conditioner?

The UK market offers a variety of highly rated air conditioners. Brands such as Dyson, AEG, and Meaco are often mentioned among the best available, with stockists including Currys, Homebase, and John Lewis offering a range of portable and fixed options.

How to choose AC for bedroom?

Selecting an AC unit for a bedroom requires assessing the room size, desired temperature, energy efficiency, and noise level. Look for features like programmable thermostats, energy-saving modes, and a high SEER (Seasonal Energy Efficiency Ratio) rating for cost-effective operation.

How big of an AC do I need for a bedroom?

The required AC size for a bedroom depends on the room's square footage. As a general rule, an air conditioner needs about 20 BTU for each square foot of living space. However, factors like room height, insulation, and window exposure can affect this estimate.

What size air conditioner do I need for a 12x15 room?

For a 12x15 room, which is approximately 180 square feet, you would need an air conditioner with a capacity of about 3,600 BTUs. However, it's advisable to account for other factors such as room insulation, sunlight, and occupancy that might require a slightly larger capacity.

Is a 12000 BTU air conditioner too big for bedroom?

A 12,000 BTU air conditioner might be too large for a standard-sized bedroom, leading to inefficient cycling and energy waste. It's important to match the air conditioner's capacity with the room size for optimal performance. A unit that's too big can also result in increased humidity levels within the room.

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Article by
Stephen Day | Co-founder
Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.