Heating water is a big drain on your energy bill and some producers of tankless water heaters say that by switching it is possible to cut your energy costs in half. Tankless water heaters are also called demand of instantaneous water heaters as they provide hot water only when it is needed.
Instead of heating a full tank of water and keeping it at a hot temperature the tankless water heater heats water through a heat exchanger only when hot water is needed. You will still use power to operate the water heater but not nearly as much as maintaining a tank of water at a specific temperature. Tankless water heaters can be used for your entire houses water needs or for dishwashers, remote bathrooms, hot tubs, poolhouse, remote BBQ, outdoor sinks and more.
There are two basic models currently available a gas tankless water heater or an electric tankless water heater. Each type of tankless water heater has specific requirement and you need to determine which type your house can handle or if you need to make any changes. Electric models will require certain voltages, amperage and its own circuit breaker. A gas model needs to have proper ventilation.
When choosing a model you need to first think what do you want the tankless water heater for? If you only want the tankless water heater for a single fixture then you should look into the following models, Stiebel Eltron Point of Use, Chronomite Instant Flow SR, or Eemax Single Point tankless water heaters. If you want to boost the heat in ling pipers then a thermostatic system is perfect or to provide hot water to two fixtures then a flow controlled model is best.
There are models available to provide hot water for your entire home or even your entire property depending on what you want. The Rheem Indoor gas fired tankless water heater, Eemax EX280T2T series three and Stiebel Eltron Tempra are all large enough to supply hot water to your whole house.
As with most of the current energy efficient products today the start up costs tend to be expensive but these are offset by the reduction in energy costs as you use the product. Using a tankless water heater uses much less energy then a traditional tank water heating system. You may need to do a few home renovations to install the system as electric models will need plugs and gas models will need proper ventilation. The systems should also be cleaned once a year and you may need to install filters depending on the quality of your water.
A few disadvantages are that the water temperature tends to be inconsistent. Additionally if you only need a small amount of hot water then the heat exchanger may never turn on. Tankless systems also do not produce instant hot water it may take a few minutes for the water to warm up. Also if the power should go out then you will not have hot water.
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