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Best energy efficiencies - Holiday Sale 2025

Last Updated - December 24, 2025

1
Best Choice
26% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

McGraw-Hill Education
26% Off

Energy Efficiency and Management for Engineers

McGraw-Hill Education

$89.78

$121.00
(26% Off)

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$89.78
$121.00 (26% Off)
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Univeristy of Florida

Energy Efficient Building Construction in Florida 11th Edition

Univeristy of Florida

$86.79

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$86.79
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

FULMT

Stop Energy Saving Device, Electricity Saving Box Saving Device, Power Saver Electricity Saving Device Save Electricity, US Plug 90V-250V 30KW (4Pack)

FULMT

$7.77

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- Wide Compatibility: Our energy saver is suitable for homes, cafes, offices, hotels, restaurants, and more. It is compatible with a variety of appliances, including air conditioners, washing machines, refrigerators, rice cookers, and ovens, making it an ideal energy-saving device for both home and office use.
- Saves Energy and Money: The energy saver consumes almost no power itself and is particularly suitable for high-power appliances such as refrigerators, air conditioners, and televisions. The longer it is used, the more apparent the energy-saving effect becomes.
- Reliable Performance: Our energy saver operates under rated load and utilizes a capacitor system to smoothly release stored energy. The casing is made from ABS material, ensuring that the device is both safe and reliable.
- Energy Saver: This energy saver optimizes voltage and current, reducing line energy loss and preventing excessive use and wear of electrical appliances, thereby extending their lifespan.
- Easy to Use: Simply put the energy saver into a power outlet, and the green indicator light will illuminate, indicating that the device is ready to work. Keeping it connected effectively reduces power consumption and avoids energy waste.
$7.77
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Amazon Basics

Amazon Basics A19 LED Light Bulbs 60 Watt Equivalent, Warm White (3000K), Energy Efficient 9W, Non-Dimmable, 10,000 Hour Lifetime, 24 Count (Pack of 1)

Amazon Basics

$19.56

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- STANDARD FIT: The E26 standard base provides compatibility with most fixtures, making it easy to install these LED bulbs in lamps and overhead lighting.
- LONG LASTING PERFORMANCE: These LED bulbs offer a 10,000 hour lifespan, providing lasting illumination for over 9 years (based on 3 hours of use each day), helping minimize replacements
- GREAT ATMOSPHERE: Enjoy warm white light bulbs that create a comfortable atmosphere for any room
- ENERGY EFFICIENT: These 9W LED light bulbs provide the brightness of 60 watt light bulbs, saving $56.10 in energy costs over their lifetime compared to the incandescent equivalent (based on 3 hours/day)
- ENERGY EFFICIENT CHOICE: Switch to these LED light bulbs and contribute to a sustainable environment by reducing energy consumption and waste
$19.56
5
Best Value
11% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Taunton Press
11% Off

Musings of an Energy Nerd: Toward an Energy-Efficient Home

Taunton Press

$30.98

$34.99
(11% Off)

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$30.98
$34.99 (11% Off)

Best energy efficiencies - Holiday Sale 2025

Energy Efficiency and Management for Engineers

Energy Efficient Building Construction in Florida 11th Edition

Stop Energy Saving Device, Electricity Saving Box Saving Device, Power Saver Electricity Saving Device Save Electricity, US Plug 90V-250V 30KW (4Pack)

Amazon Basics A19 LED Light Bulbs 60 Watt Equivalent, Warm White (3000K), Energy Efficient 9W, Non-Dimmable, 10,000 Hour Lifetime, 24 Count (Pack of 1)

Musings of an Energy Nerd: Toward an Energy-Efficient Home

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