I over hear a couple at a home improvement store asking a clerk why their 125 gal hot water tank was not doing the job. The clerk tried to help them work through the possibilities but what was certain was it far exceeded their needs even if it was working right.
Rust, corrosion and deposits will, over time reduce the efficiency of a hot water tank. You get a hint of this the first time you have to turn the heat up a notch. It's all part of the aging process, but hopefully, when the time comes, this will be last tank to go to the landfill. Instead, why not turn to the new technology that has been around for 50 years – tankless water heaters.
Tankless water heaters, a familiar sight in Europe and other places, have a reputation for energy efficiency, which translates into more money in your pocket and less strain on the environment.
If you are in the market for an upgrade do a little research of your own. Most websites have helpful information to make decision making easier.
Finding the right tankless hot water heater is simple to do. The rate of flow is determined by the difference between winter ground water temperature and what's called for at the showerhead. Another factor is the more faucets running at one time the greater the flow, which means the higher energy use. Like this:
temperature rise x flow rate = energy
Energy is measured in British thermal units (Btu) for gas water heaters and kilowatt hours (KWH) or amps for electric. Manufacturer's websites have tables to help you with this.
Basically there are three things to consider when picking the tankless unit right for your needs:
Faucets running simultaneously
Hours of hot water consumed per day
Since gas is the most efficient of the two energy sources, higher numbers in these three points above would recommend gas as the best choice. Remember propane is an alternative. Lower numbers makes electric units more competitive. Gas or electric, either will gain you energy savings.
Considering the three points mentioned, it is estimated that cost savings could be anywhere from 20 to 80 percent.
Gas tankless water heaters are more expensive to install. Most warranties require installation by a technician. Outdoor models could require protection against freezing with heating and draining devices, supplied by the manufacturer. Interior models should also be safe from sub freezing temperatures. They also require special venting – some with a combined fresh air pipe and exhaust system. A unit can usually be installed in a day.
Because electric power is more expensive than gas, these units are better suited for smaller jobs. Smaller meaning 2-3 people in a house in the southern half of the US This is just a rough estimate of what is possible.
Whichever you choose, the result will be more energy savings and less pollution. Add to that a continuous stream of instant hot water. A tankless water heater means you can enjoy plentiful hot water and save.
Source by Ryan Fletcher