When you enjoy the comfort brought by air conditioning or floor heating in the house, you can know that closing doors and windows can only solve the problem of heat convection, but cannot block the conduction of heat. A large amount of energy in the house is lost to the outside through the doors and windows of your house, resulting in waste of energy consumption and increasing your energy expenditure. If your doors and windows are more energy-saving, the benefits will be "more and more."
In terms of temperature alone, the temperature difference between using energy-saving doors and windows and using ordinary doors and windows can be about 4℃. In summer, to keep the indoor temperature of a 100 square meter house at about 26℃, a 2-horse air conditioner needs to consume 10 to 12 degrees of electricity every day. Using energy-saving doors and windows can save at least 40% of electric energy, that is, the air conditioner can be turned on for 2 hours and the indoor comfortable temperature can be maintained for 5 to 6 hours. In this way, we can save at least 4 to 5 kilowatt-hours of electricity a day and 70-90 yuan of electricity per month. In winter, the cost of a family in the heating season is roughly 2,000-3,000 yuan. If the energy saving standard is 40%, a winter can save roughly 800-1,200 yuan.
The non-energy saving of doors and windows not only causes people to spend more money on daily energy expenditure, but also causes the country to produce huge energy waste. With the crazy development of real estate in recent years, building energy consumption has accounted for more than 40% of the total energy consumption of the whole society, while the energy loss through doors and windows accounts for about 50% of the building energy consumption, in other words, the energy loss through doors and windows accounts for about 20% of the total energy consumption of the society.
If the energy-saving level of doors and windows in China's existing construction area of 43 billion square meters can reach the current European standard, 420 million tons of standard coal will be saved each year, equivalent to 20% of China's total annual coal output. However, the reduction of coal consumption will directly help reduce the generation of smog (a large amount of coal for central heating is one of the main causes of smog-prone weather in northern winter). The resulting improvement in health and ecological environment will far exceed the cost of replacing energy-saving doors and windows.