Improvement of heat insulation properties of building 1 Waterproof 2 Wall insulation 3 Floor insulation 4 Window 5 Roof insulation energy audit inspection Supply method 1 Air heat source heat pump 2 Ground heat source heat pump 3 Solar panel (PV) 4 Solar water heater 5 Heat warehouse 6 Main analysis of woody fuel heating performance 1 Air source Heat pump 2 Ground heat source Heat pump 3 Solar panel 4 Solar water heater 5 Wood fuel heating
4 Failure to save energy is free and costly at all times. The problem is to judge how big the merit is. Saving energy exceeds the cost of doing so (if you do so). (There are cases where the cost is negligible, such as the effort and thought necessary to flick the switch when leaving the room, but it exists). For example, when gasoline prices jumped sharply in 1979, some dealers raised the price of small, energy-efficient cars well beyond the selling price, but still selling cars. Larger vehicles offer discounts at prices close to the price of additional gasoline used by heavy vehicles at initial purchase.
There are several reasons for improving energy efficiency. One is to reduce energy consumption and save consumer money. However, we will discuss savings only if energy savings are not offset by the additional cost of implementing energy saving technology. Another advantage of the energy efficiency program is not only cost reduction but also reduction of greenhouse gas emissions, improvement of outdoor air quality, improvement of human health through reduction of acid rain. According to the International Energy Agency, improving energy efficiency in buildings, industrial processes and transportation will reduce global energy demand by a factor of 2050 in 2050 and will help to manage global greenhouse gas emissions it can.