23 Oct 2023

Ways to save energy through efficient use of your AC

As the seasons change and temperatures fluctuate, ensuring comfort often leads to extended usage of AC equipment. This can have a significant impact on energy consumption. In this article, we will explore various ways to save energy through the efficient use of your home’s AC. By implementing simple strategies and making informed choices, homeowners can effectively manage their energy usage while maintaining optimal comfort levels.

We will discuss a range of practical tips and techniques to maximize AC efficiency, reduce energy waste, and promote sustainability.

Signs your air conditioner is wasting energy

There are several signs that indicate your air conditioner may be wasting energy due to inefficient operation.

  • High Utility Bills: one of the most noticeable signs is receiving higher utility bills, as excessive energy consumption can result in increased costs. If your electric bill shows a significant spike in energy usage, it may indicate that your cooling system is inefficient.
  • HVAC running longer than usual: another sign to look out for is noticing that your HVAC cycles are longer than usual. This could imply efficiency issues that can lead to unnecessary energy expenditure. A common cause for abnormal AC cycles is clogged air filters, which restrict airflow and make the AC work harder, meaning a longer cycle.
  • Inconsistent temperatures: Lastly, when cooling, if you notice inconsistent temperatures in a particular room, with certain areas feeling warmer than others, it may suggest that your air conditioner is not effectively cooling that specific space.

Poor indoor air quality is another indicator of energy waste, as an inefficient AC may struggle to circulate air and maintain proper home humidity levels. By paying attention to these signs, you can identify potential problems and take the necessary steps to address them, improving both energy efficiency and comfort.

How to use your air conditioner efficiently to boost energy savings

For the best way to save energy with AC and boost energy savings, there are several strategies you can implement. One effective method is increasing or decreasing the temperature: Depending on the temperature outside, you can expect savings on your energy bill if you adjust your AC a degree or two. For example, setting the temperature 1 degree abov your usual cooling temperature can save you up to 3% on your bill. 

Proper installation and regular maintenance, such as replacing and cleaning filters, can also safeguard efficiency and reduce energy waste. Additionally, you can consider programming your AC, particularly when you're away from home, to slightly increase the temperature during those periods, but meaning your AC doesn’t have to work so hard to reach the desired temperature on your return. AirCloud Go offers flexibility in managing temperature settings based on your schedule. 

To further optimize energy efficiency, if you frequently experience high temperatures, keep blinds or shades closed during the hottest parts of the day and minimize the use of heat-generating appliances like ovens and dryers. Whereas in colder regions open blinds and curtains to warm up the house naturally, and keep doors and windows closed in order to trap heat in. 

By incorporating these and other practices into your AC usage, you can maximize energy savings and reduce your carbon footprint. 

Keep your air conditioner device prepared for any weather

Keeping your air conditioner prepared for any weather is essential for its optimal performance. Regular AC maintenance, such as cleaning or replacing filters, checking for any leaks or damage, and ensuring proper insulation, can go a long way in keeping your AC running smoothly. Additionally, adjusting temperature settings based on weather conditions can help maintain a comfortable indoor temperature while conserving energy. To do so, it is important to understand first how to keep your air conditioner ready for any weather. 

Regulate the air conditioner temperature as a way to save energy


Regulating the air conditioner temperature is vital for saving energy and promoting efficiency. During the summer months, it is generally recommended by ASHRAE to set your air conditioner temperature between 22ºC and 27ºC (72ºF-80ºF) to strike a balance between comfort and energy efficiency. In winter, adjusting the AC temperature to around 20ºC to 23ºC (68ºF-74ºF) helps reduce the strain on your AC system and minimizes energy consumption while still ensuring a comfortable indoor environment. However, it is important to check local recommendations, as the standards may vary depending on the region.

Programming your air conditioner to help save energy

When the AC runs constantly, your home becomes a heat magnet, leading to increased cooling processes and higher energy consumption. To use your air conditioner efficiently and boost savings, you can program your AC using airCloud Go, and consider implementing these aircon energy saving tips:

Best ways to save energy by efficiently using AC controls and timers

To maximize energy savings and optimize your AC usage, making optimal use of AC controls and timers is crucial. One of the best ways to save energy is by programming your AC based on peak and off-peak hours. By aligning the programming with peak occupation periods and considering peak energy costs, you can effectively regulate the temperature and AC airflow in your home. By utilizing AC controls and timers wisely, you can significantly reduce your energy usage and lower your utility bills. 

How to use energy-saving features on your aircon

Hitachi Air conditioners, specifically the airHome range, offer a range of energy-saving features designed to promote efficiency and reduce power consumption. The Smart Eco system is one of these features, as it detects human presence and absence in a room and automatically adjusts the power settings accordingly. By avoiding unnecessary operation in unoccupied spaces, this technology helps minimize energy waste. Another notable feature is  which optimizes temperature control during sleep to prevent the room from becoming excessively hot or cold. By maintaining a comfortable sleeping environment, SleepSense technology reduces energy usage that would otherwise be wasted on excessive cooling or heating.


Woman Using Smart Remote for AC Unit as a way to save energy

Physical factors that might help in ways to save energy

When it comes to saving energy, considering physical factors in your environment can play a significant role. Factors such as humidity levels, furniture layout or shading windows and investing in insulation could help to significantly reduce the workload on your air conditioner. By addressing these physical factors, you can maximize energy savings and enhance the performance of your AC system.

How humidity affects AC energy saving

House humidity levels play a crucial role on how to save electricity with your AC. A general recommendation, according to ASHRAE, is to maintain a relative humidity range of 20% to 80%. However, in environments with high humidity (where copper and silver corrosion is evident), it is advised to keep the upper moisture level below 60% RH, potentially even lower than 50%. By controlling humidity levels within these recommended ranges, you can optimize the efficiency of your air conditioning system and promote energy savings.

How your furniture layout can be blocking your air conditioner airflow

It's important to be mindful of where you place your furniture in a room. If you position a large chair or couch near an air vent, it can obstruct the free flow of air coming from the duct. Similarly, avoid placing area rugs over floor vents, as this can impede the airflow. Ensure that all furniture, artwork, and decor elements are positioned in a way that allows your vents to provide an unobstructed and effective air current. By optimizing the furniture layout, you can enhance the airflow and maximize the efficiency of your air conditioner.

Similarly, wall-mounted air conditioners can be subjected to poor placement of furniture, such as wardrobes, or when they are installed in inadequately chosen sections of the wall. These factors can impede the airflow, obstruct proper ventilation, and ultimately undermine the efficiency and effectiveness of the air conditioning unit. Therefore, it is crucial to carefully consider the positioning and installation of these units to ensure optimal performance. 


Woman saving money on Air Conditioning in her apartment

Managing heat-generating appliances to improve AC efficiency

When aiming to keep the home cool, heat-producing appliances such as ovens, stoves, dryers, and even incandescent light bulbs can significantly contribute to the heat load in your home. By using these appliances during cooler times of the day or limiting their use altogether, you can reduce the overall heat generated in your space. Additionally, considering energy-efficient alternatives such as LED lights and energy-efficient appliances can help minimize the heat output and relieve the workload on your air conditioner.

How shading and insulation can help to reduce the air conditioner workload

Proper shading of windows can prevent direct sunlight from entering your home, reducing the amount of heat that needs to be cooled. Moreover, effective insulation helps minimize heat transfer between indoor and outdoor spaces, resulting in more stable temperatures and reducing the strain on your AC system, whether cooling or heating.

Saving energy and improving your health with smart air-conditioning

Smart air-conditioning systems offer a range of benefits, including energy savings and improved health. With sensors that detect human presence, these systems can optimize cooling based on occupancy, preventing wasteful energy consumption. Additionally, FrostWash technology helps maintain a cleaner air conditioner on the inside by removing dirt and impurities, resulting in improved air quality. By using airCloud Go, you can conveniently control your AC settings remotely, ensuring that you arrive home to a comfortable and efficiently cooled environment. These smart features not only enhance energy efficiency but also contribute to a healthier living environment.


Man taking care of plants in perfect house humidity conditions thanks to Hitachi AC

Inspecting the dirt in the aircon filters

Ensuring the cleanliness of aircon filters is vital for maximizing air conditioner performance. Over time, dust and debris accumulate in the filters, obstructing airflow and reducing the efficiency of the unit. Regularly inspecting and cleaning the filters ensures that air can flow freely, improving cooling effectiveness and preventing strain on the system. In addition, clean filters help maintain better indoor air quality by trapping airborne particles such as dust, pollen, and allergens. By paying attention to the dirt in the aircon filters, you can enhance the overall efficiency and effectiveness of your air conditioning system.


Why is it important to clean AC filters to save energy


Regularly cleaning AC filters is of utmost importance when it comes to saving energy. A dirty filter can significantly impact the performance of your air conditioner. It restricts airflow, leading to reduced cooling or heating efficiency and increased energy consumption. Moreover, clogged filters can result in inconsistent temperatures and compromised air quality, as dust, grime, and mold particles contaminate the air. This not only affects your comfort but also poses potential health risks. Also, neglecting filter cleaning can shorten the lifespan of your unit, leading to breakdowns and costly repairs. By maintaining clean filters, you can ensure optimal energy efficiency, improve air quality, and extend the longevity of your air conditioning system.

Are Indoor Air Quality (IAQ) and air conditioning efficiency linked?

Yes, indoor air quality (IAQ) and air conditioning efficiency are closely linked. The performance of an air conditioning system directly affects the quality of the air circulating indoors. An efficiently functioning AC system can help remove pollutants, allergens, and odors from the air, improving IAQ. On the other hand, a poorly maintained or inefficient AC system may fail to filter the air effectively, leading to poor IAQ and potential health issues. As mentioned above, inadequate IAQ can also be caused by dirty or clogged filters, which is a symptom leading to inefficient energy use. 

How can Hitachi products help you to save energy?

Hitachi air conditioners incorporate various energy-saving features and technologies to help users. For example, smart sensors that detect human presence, allowing the system to adjust power consumption accordingly. Technologies like FrostWash help keep the AC cleaner on the inside, improving air quality and system efficiency. Hitachi also offers the aforementioned solutions like airCloud Go, enabling users to remotely control and monitor their AC, ensuring efficient temperature management and energy savings.

Through these innovative features, the Hitachi residential AC range aims to provide energy-efficient solutions that help reduce the household’s environmental impact while saving on energy costs. 


by Hitachi
23 Oct 2023