[Summer 2026] Keep Cool While Saving on Electricity! 8 'Power-Saving & Heat-Countermeasure' Goods That Kill Two Birds with One Stone

With hot days continuing, many of you are likely concerned about the electricity bills for appliances like air conditioners that are running at full capacity every day.

In this article, we will introduce convenient goods that are 'both power-saving and effective against the heat,' killing two birds with one stone.

Please note that in this article, we have intentionally avoided expressions like 'It will pay for itself in X months!' because:
・Differences in electricity rates depending on your region
・Usage hours and settings in your home
・The product's service life

These vary greatly depending on the environment, and we believe it is not sincere to easily assert that you will 'save X yen'.

Instead, we have carefully selected and summarized 'items that are easy to introduce and lead to power savings through their structure and mechanism without strain.' Please use this as a reference for your electricity bill countermeasures this summer!

[Window & Light Heat Countermeasures (4 options to choose from based on interior and preference)]

1. Blackout Curtains (For redecorating and solid light blocking)

By powerfully blocking direct sunlight, you prevent the rise in room temperature at the source. Since the cooling efficiency of the air conditioner increases, you don't have to force the set temperature down. This is also perfect for those who 'want to replace old curtains' or 'want to redecorate their room.' Choosing high-performance types like Grade 1 blackout curtains is effective not only for summer heat shielding but also for winter insulation (cold protection).

2. Heat-Shielding Lace Curtains (Keep your room bright)

These use special fibers to cut infrared rays (heat) while letting in just the right amount of light. It is an item that fulfills the selfish desire of 'I don't want the room to get dark, but I want to take measures against the heat.' Since the room doesn't get dark even if you keep the curtains closed during the day, there is the double benefit of saving on daytime lighting costs (electricity bills).

3. Blackout Blinds (Stylish & fine-tuning airflow)

By changing the angle of the slats, you can block direct sunlight while letting only the 'breeze' pass through. Recommended for those who think 'curtains make the room look small' or 'want a stylish look.' Because you can finely adjust the amount of light entering, it is also useful for preventing screen reflections during desk work.

4. Window Heat-Shielding Film (DIY measures just by sticking it on)

By sticking it directly onto the window glass, you block heat from the outside. Its strength is that you can get a heat-shielding effect even with the curtains open. If you choose a type that can be applied with water, it is safe for rentals. It is ideal for windows where you want to 'keep your current curtains or blinds but easily add a heat-shielding effect.'

[2 options for zero electricity cost and insect repellent by letting in the breeze]

5. Removable Screen Door for Entrance (Let the breeze blow through the whole house!)

By opening not just the windows but also the 'entrance,' a powerful path for wind (air circulation) is created in the house. The time you can spend without the air conditioner, using only natural breezes, will increase. If you use a magnetic or hook-and-loop fastener type, it can be easily installed on rental entrances without construction. Since it can be quickly removed during seasons when not in use or when moving, it is a cost-effective option.

6. Peppermint Oil Spray (Cool sensation + natural insect repellent)

When sprayed on screen doors, clothing, or your body after a bath, the menthol component makes your perceived temperature drop refreshingly. It also has a natural insect-repellent effect that keeps away 'bugs' that you worry about when letting in the breeze. Because it does not use chemical substances, it is attractive for use in households with small children or pets.

[1 option for space-saving air circulation from the ceiling]

7. Ceiling fan with integrated light

Since cold air from air conditioners tends to settle at the bottom, sending air from the ceiling makes the temperature throughout the room uniform. You can stay comfortable even if you raise the air conditioner's set temperature by 1 to 2 degrees.
The biggest advantage is that it 'doesn't take up floor space' like a circulator or electric fan. It is the best unit to introduce when switching to LED lighting or replacing your current light (for those who think 'my lighting is about to break').

[1 item for power-saving while sleeping & year-round use]

8. Hot water bottle type for both ice and hot water

By putting ice water in it and cooling your neck or feet while sleeping, your perceived temperature will drop significantly. Even after the air conditioner timer turns off, you will be less likely to wake up due to discomfort.
Its greatest strength is that it 'doesn't end with just summer.' Since it can be used as a warm hot water bottle by putting hot water in it during winter, it doesn't go to waste all year round and can be used directly to save on heating costs in autumn and winter.

Were there any items that fit your lifestyle or that you felt would be easy to incorporate?
Please choose the method that is perfect for your situation, considering ease of introduction and installation effort, and try to use it for effortless power-saving and heat countermeasures.

Thank you very much for reading until the end.
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