If you are replacing your water heater and looking for an energy efficient option, a tankless water heater can be a great choice. There are some different things you need to consider during choose the tankless water heaters and the traditional tank style water heaters. Here’s what you need to know to make the right decision.
First Checking the Ratings
There are two ratings to check before you buy any heater: flow rate and the energy factor. The EF stands for how efficient the heater is and the higher the number, the more efficient the device. For choosing the right tankless water heater, the first step is identifying where you live because the groundwater temperatures in your area has significant impact on the heater’s flow rate.
What’s the Advantage of Going Tankless?
Tankless water heaters have becoming popular among homeowner because they work on demand, they do not have to keep water with a storage tank, which means tankless water heaters can provide an endless supply of hot water. By bringing hot water close to where it’s needed, it helps reduce your energy cost. On the other hand, most tankless water heaters come with long life expectancy, some even more than 20 years.
The trouble is the typical tankless water heater often has a lag time of three to eight seconds to fire up the burners. Another sad fact is the initial cost of tankless water heaters are priced several times higher than traditional water heaters. And tankless water heater can happen the “cold water sandwich effect,” which occur when you turn on hot water a few minutes after the first task, a splash of cold water triggered the heater coming back on.
How to Choose the Right Size
There are two main types of tankless water heaters are available on the market, including gas and electric. Typically, gas tankless water heaters are more efficient than electrically powered units. However, this type needs a higher initial cost for installation. Determining the size of a tankless water heater for your needs can following three simple steps.
1. Determine your Water Flow Rates. First, list all the hot water devices you will use at any one time. A low-flow shower head may use 1.5 gallons hot water, a kitchen or bathroom sink may run 1.5 GPM from faucet. To reduce flow rates, install low-flow water fixtures.
2. Find your average groundwater temperature in your area. This water will be heated to be comfortable temperature by your tankless water heater. Water temperature is as low as 37 F in the northern American will need more energy to heat it.