Before you start buying components for a home power system, you need to know how much power you use. By taking an inventory of all the electrical loads in your house, and doing a basic electrical load evaluation, you can get a good idea how much power your system needs to produce. If you are designing your power system before building the home, you will need to carefully plan what appliances and electrical systems you will be using. You can use our automatic Load Evaluation Form to simplify your load calculations. Once you enter the necessary information for each appliance in your home, the form will automatically perform the calculations for you. You will find links to the form and its instructions at the bottom of this page. (You need Adobe's Acrobat Reader 4.x or higher to use the automatic calculations. Otherwise, you will need to perform the calculations by hand.)
The aim of the study by the Norwegian Institute of Public Health was to investigate whether leakage products from these pipes are harmful to health and if they affect the taste and odour of drinking water. These leakage products consist of residues of additives used during production to give plastic pipes their desired properties, as well as any subsequent breakdown products. There are no health risks associated with drinking water from PEX pipes
Contamination of drinking water: methyl tertiary-butyl ether (MTBE) and tert-Butyl alcohol can leach from PEX in amounts that exceed taste, odor and health guidelines set by the State of California for drinking water. PEX can leach ethyl tertiary butyl ether (ETBE), a chemical in the same family as MTBE, which could contribute to taste and odor impacts, and could potentially lead to adverse health effects. PEX pipe is susceptible to permeation by outside contaminants such as pesticides, oil, gasoline, benzene and termiticides. PEX displayed the strongest biofilm formation and the strongest initial promotion of the growth of Legionella bacteria.
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