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.
When it is too cold you have to intensify the heat and add light while if it is extremely hot you have to vent the air as fast and effectively to produce new fresh air. Temperature. Maintain the daytime temperature favourable at 23 C(75 F) or below 29.4 (85 F) while at night it should be 20-22 C (68-72).If it drops drastically below that range, you should use a fan over the night to remove all the excess moisture from the air.hen it is too cold you have to intensify the heat and add light while if it is extremely hot you have to vent the air as fast and effectively to produce new fresh air. Temperature. Maintain the daytime temperature favourable at 23 C(75 F) or below 29.4 (85 F) while at night it should be 20-22 C (68-72).