Symbol Pb A soft, easily shaped, heavy, bluish-gray metallic element that is extracted chiefly from galena. It is very durable and resistant to corrosion and is a poor conductor of electricity. Lead is used to make radiation shielding and containers for corrosive substances.
When trying to cool a typical house, the average central AC will only decrease the temperature by about 20 degrees. For example, when it is 100 degrees outside, the inside will typically cool to about 80 at best. However, in order to achieve the 80 degrees inside, the air coming out of the vent should be 45-55 degrees. The temperature coming directly out of the vent is different than the ambient temperature of the house. The air coming directly from the vent should be 45-55, however this will not be the temperature in your home. If using a thermometer stuck in the vent, and the blower fan on a medium speed, in the full cold position with AC on vent, temperatures should be between 40-50 degrees F.
What temperature should I set my thermostat? Setting the thermostat at the proper temperature will save you money on your electric bill and help prevent damage to your system. The best setting for air conditioning is somewhere between 76Â°F and 80Â°F. The design temperature for most air conditioning systems is 75Â°F. This means that the air conditioner is not designed to cool below 75Â°F and setting the thermostat below this could result in damage to your equipment. If you set it lower than 76Â° the air does not come out any colder the system just runs longer. For heating the thermostat should be set somewhere between 68Â°F and 72Â°F. However if your needs for comfort are outside the normal conditions, a custom designed heating and air conditioning system can be built to suit your individual needs.