Cells have two main systems for clearing excess or damaged proteins. (scientificamerican.com)
The coverage kicks in when your home experiences problems related to failing main systems, including heating and air conditioning, or broken appliances. (simplethriftyliving.com)
Some real estate companies offer a one year home warranty when you purchase your home that covers main systems such as heating, ventilation, air conditioning, and appliances. (vamortgagecenter.com)