Besides factors like performance and ease of use, the Daikin Group stresses environmental performance in product development. We strive to raise this environmental performance by incorporating product assessment in the planning and design stages for new products.
Product assessment consists of 14 assessment items that we strictly adhere to in developing products.
We also assess global warming impact of air conditioners using the LCA (life cycle assessment) method, which allows us to determine the environmental impact at each stage of a product's life cycle. Products only make it to market after we have assessed them against their predecessor products to confirm they exert less environmental impact.
Product Assessment Items
In the life cycle of an air conditioner, from design and manufacture to use and disposal, the majority of the CO2 that is emitted occurs during product use: over 90% in fact.
That is why when we revised our voluntary environmental standards in fiscal 2007, we tightened our criteria for energy efficiency in the product use stage in order to improve the energy efficiency of products.
In fiscal 2011, we strove to boost the APF (annual performance factor) and reduce the standby power consumption of products including commercial air conditioners and air purifiers.
Sample of LCA: Comparison*1 of Life Cycle CO2 Emissions(energy-induced CO2)
More than 90% of the CO2 emissions (energy-induced CO2) during the life cycle of an air conditioner come during product use.
That's why we put the majority of our efforts into making products more energy efficient.
*1 Based on Daikin standards for 14-kW class commercial air conditioners and 2.8-kW class residential air conditioners.
*2 The seasonal power consumption is calculated in accordance with the standard of the Japan Refrigeration and Air Conditioning Industries Association for commercial air conditioners and the Japanese Industrial Standards (JIS) for residential air conditioners.
Electricity Consumption and Energy Consumption Efficiency (residential air conditioners)*1
*1 Calculated for Daikin 2.8-kW class air conditioners. Under JIS conditions.
*2 For products with prescribed measurements
Electricity Consumption and Energy Consumption Efficiency (commercial air conditioners)*
* Calculated for Daikin 14.0-kW class air conditioners. Under conditions of the Japan Refrigeration and Air Conditioning Industry Association, and JIS (Japan Industrial Standards).
In 2006, the Law Concerning the Rational Use of Energy was partially revised: residential air conditioners of 4.0 kW or smaller now have to achieve not only the COP standard values, but also APF standard values with fiscal 2010 as the target year, and commercial air conditioners have to achieve APF standard values with fiscal 2015 as the target year.
* COP APF:
COP (coefficient of performance): The value of kW of cooling or heating capacity generated per 1 kW of power consumption. Calculated as follows: Cooling or heating capacity (kW) divided by electricity consumption (kW).
APF (annual performance factor): The ratio of the total heat quantity (Wh) required to cool and heat a room during both the cooling and heating period to the total power consumption (Wh) during the same period. This allows calculation of an efficiency figure that more closely approximates the figure during actual use.
Daikin's Eco-ZEAS 80 air conditioner for stores and offices has one of the industry's highest APF values. And a new model released in May 2012 boasts new functions for saving energy. One of these is the Intelligent Savings Function, which memorizes daily operation patterns and automatically cuts peak energy use by approximately 15% with the touch of a button. It is also the industry's first such product to have standby power consumption of less than 1 watt.
The Eco-ZEAS 80 is also the first heat-pump-type air conditioner with an all-aluminum heat exchanger, which reduces product weight and cuts the use of refrigerant.
Eco-ZEAS 80 Intelligent Savings Function