Yet you can install smaller versions of windmills near your house and can store energy of electrical devices. The greatest benefit is of course no monthly bill; all you have to bear is onetime expenses of erection. If you think for a second about the greatest source of energy, you might probably end up concluding it's the atomic power. On first position lie the electric appliances that aren't switched off even when not needed. Have you noticed that you don't turn of T.V or lights or Air conditioner when you leave your room for some time? Of course you plan to show up quickly but meanwhile you spend so many units and that too in vain. He can also report the mechanical efficiency of each device by measuring the input and output rate. Home energy auditor is an expert of thermograph and can record surface temperature of each wall. Thus identifying any loss of heat or cooling either through convection or radiation. A thermal assessment can nearly cost $300 to $600. The walls, roof, base of the home and floor are basic structure of your home. The basic structure should be strong and capable of providing strength to the remaining parts of your home. The structure should be strong enough that will not deteriorate for decades. The windows and ventilators are most important part of your home. Let us start from: Insulating- As we all know that clothes keep our body warm by trapping the body heat inside, similarly the same principle goes with keeping the house warm in winter. Keeping the house tightly insulated is the best thing but not always the easiest thing to do. Any gap left around the wall enclosure will deteriorate the quality of the insulation i. At times, the cost of one type of unconventional energy source is just not reasonable enough to be surveyed by the government. There is also the difficulty of transition from the usual energy sources to the unconventional one. Several people are doubtful about any new mean of energy source. They usually prefer to stick with the old conventional electric sources.