If you own a home, then you ill need the services of plumbing companies at some point in your life. Plumbing rates, plumbing repair costs, and affordable plumbing in general can cost a pretty penny. Here are a few things that you should know before you even start to look into the plumbing companies.

1. Hot water heat recycling is the process by which heat is recovered from used water. This usually takes place primarily from sinks, showers, dishwashers, and washing machines. Heat exchanger systems can recover as much as 60 percent of the heat that is normally wasted when these activities take place in the home.

2. Indoor plumbing was exceedingly rare until the industrial revolution and the subsequent growth of modern densely populated cities and the rise of the middle class in the 1800s.

3. Copper tubes used in plumbing applications date back to approximately 2750 BCE. However, lead pipes were much more common at the time.

4. In spite of the green movement that has taken the United States by storm in the past few decades, approximately half of the energy in the American grid is coal generated. As alternative fuel and energy sources become more and more viable and affordable, this number is sure to begin a steep decent down.

5. Another thing that will be helpful for you to know is that HVAC repair services are also known as heating, ventilation and air conditioning. The main purposes of Hvac preventative maintenance are to help maintain good indoor air quality through adequate ventilation. To see more, read this.