In the first 3 factors that affect buying no electrical equipment is then compared with the money to pay for a device that is used to add, one at a time, and are not sure whether the device is really energy-efficient purchasing.
The first three factors that affect the electrical equipment is not buying. Comparison, not worth the money to pay extra, as long as the equipment used to, and not sure what to buy energy-saving devices or not.
Factors affecting 3 first choose not to buy equipment. When comparing and not worth the money to pay increase, the device is a long use, and not sure buy equipment energy saving or not.