- 1 How do I know what size tankless water heater I need?
- 2 How many tankless water heaters do I need for my home?
- 3 What is the downside of a tankless water heater?
- 4 Can a tankless water heater fill a tub?
- 5 Is it worth switching to a tankless water heater?
- 6 How long does a tankless water heater last?
- 7 Can tankless water heater heat whole-house?
- 8 How much should a tankless water heater cost installed?
- 9 Can I replace my hot water heater with a tankless?
- 10 Is 200 amp service enough for tankless water heater?
- 11 Can you have 2 tankless water heaters?
- 12 Why would you need 2 tankless water heaters?
How do I know what size tankless water heater I need?
How to Select the Right Size Tankless Water Heater
- Determine the maximum number of devices you want to run and their total flow rate. Then, add up their flow rates (gallons per minute).
- Determine required temperature rise.
- Sizing Example: An average shower will be between 104–106° and uses 2.6 gallons of water.
How many tankless water heaters do I need for my home?
For larger households that typically use more than 85 gallons per day, two tankless systems, or the largest available model, are likely needed. For smaller households that use under 40 gallons per day, one unit should suffice.
What is the downside of a tankless water heater?
The primary disadvantage of on demand or instant hot water heaters is the upfront cost. The smaller units that you often see won’t produce enough hot water to serve most households. They’ll only serve one faucet at a time—a problem if you want to shower while the dishwasher is running.
Can a tankless water heater fill a tub?
Please remember that tankless water heaters also come in different sizes, and you need to get a unit that will deliver a strong flow to the tub. A small tankless water heater can take a long time to fill a large tub. Whatever way you choose, at least now you’ll finally be able to relax in a nice, hot whirlpool tub.
Is it worth switching to a tankless water heater?
The big advantage of tankless water heaters is that they use less energy since they only heat up water when you need it. You can save hundreds on your energy bill each year. Because they don’t waste power, you can also enjoy the fact that your home will be more sustainable and eco-friendly.
How long does a tankless water heater last?
Most tankless water heaters have a life expectancy of more than 20 years. They also have easily replaceable parts that extend their life by many more years. In contrast, storage water heaters last 10–15 years.
Can tankless water heater heat whole-house?
Even in a cold climate, these efficient units can provide both domestic hot water and whole-house heating. Tankless water heaters are a proven technology with a track record of many years for heating DHW (see “Installing On-Demand Water Heaters,” 2/06).
How much should a tankless water heater cost installed?
The gas tankless water heater installation cost would be in the $1200 to $3000 range if switching from electric to gas. You do save about $250 because you do not need a tempering valve installed with a gas tankless water heater installation.
Can I replace my hot water heater with a tankless?
Keep in mind, however, that most conventional gas tank water heaters were not installed with a tankless retrofit in mind. The higher the energy factor, the more efficient the water heater. For a household of one or two people, a tankless electric unit will probably be adequate.
Is 200 amp service enough for tankless water heater?
A: Electric Tankless water heaters usually require substantial and expensive upgrades in your system. This extra load requires at least 120 amps. The average home has a total capacity of 200 amps, which means an upgrade would be needed.
Can you have 2 tankless water heaters?
Installing two small tankless water heater units is typically more expensive than installing one large one, but it can ensure clients have hot water on demand for a variety of simultaneous uses. Most propane or natural gas tankless water heaters on the market can handle a rate of 5 gpm at a 70 degree temperature rise.
Why would you need 2 tankless water heaters?
Greater efficiency can be achieved by installing multiple, smaller tankless water heaters throughout the home. Hot water is then drawn from nearby tankless appliances instead of being lead through the home’s entire plumbing system from basement to point-of-use.