- 1 What is the downside of a tankless water heater?
- 2 Can you run out of hot water with a tankless water heater?
- 3 How long does it take a tankless water heater to heat up?
- 4 Will a tankless water heater pay for itself?
- 5 What size tankless water heater do I need for a family of 5?
- 6 Do tankless water heaters need a vent?
- 7 Why does my tankless hot water heater go cold?
- 8 Why is my tankless water heater not getting hot?
- 9 How do you get instant hot water on a tankless water heater?
- 10 Why does it take so long to get hot water from my tankless hot water heater?
- 11 How long until hot water runs out?
- 12 How much does it cost to service a tankless water heater?
- 13 How do I know what size tankless water heater I need?
- 14 How much should I pay for a tankless water heater?
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 you run out of hot water with a tankless water heater?
With a tankless system, there isn’t a supply of hot water that can be depleted. Instead, the water heater heats up water as there is a demand for it. It will keep doing this as long as there is demand – and that means you won’t run out of hot water!
How long does it take a tankless water heater to heat up?
Tankless units take about 15 seconds to bring water up to temperature, but you still have to wait for that hot water to arrive at your shower head or faucet, just as you do with a tank-type heater.
Will a tankless water heater pay for itself?
Tankless water heaters can eventually pay for themselves with energy bill savings, but the payback period may be long: 22-27 years for a gas tankless heater, 12-20 years for an electric. Tankless water heaters tend to last longer than storage heaters: 20 to 25 years in many cases.
What size tankless water heater do I need for a family of 5?
In short, a family of 5 would need a 10 GPM gas tankless heater or 27 kW electric tankless heater if you live in the northern part of the USA, where the input water has a lower temperature. The tankless heater has to work extra hard to bring the water temperature up to 110˚F or 120˚F.
Do tankless water heaters need a vent?
Tankless hot water heaters require special venting to blow hot exhaust gas outside, where it dissipates. Unlike traditional tank-style water heaters, gas tankless hot water heaters offer far more versatile venting options.
Why does my tankless hot water heater go cold?
Another problem that tankless water heaters can run into is that of a cold water sandwich—a plumbing term given to sudden temperature fluctuations, when your tankless water heater produces hot and cold water intermittently. This can be caused by: A dirty water filter on the cold water inlet.
Why is my tankless water heater not getting hot?
Because tankless units only heat water as it’s needed, running too many hot water appliances at the same time could mean the unit just can’t keep up. On the other hand, your “no hot water” problem could be cause by a bigger issue such as: Plugged heat exchanger (due to hard water) A blocked vent/air intake.
How do you get instant hot water on a tankless water heater?
How to Get Faster Hot Water From a Tankless Heater. The answer is to have a recirculating pump. The way they work is to create a loop from the heater to your fixture. A thermostat detects when the water is cooling down and trips the heater to heat the water.
Why does it take so long to get hot water from my tankless hot water heater?
The length of the delay can be determined by a few factors, including the distance between the water heater and the outlet. In other words, the longer the water has to travel, the more cold water will need to be discharged before the hot water appears.
How long until hot water runs out?
WAIT TIME FOR HOT SHOWER If the previous shower lasted 15 minutes, you’re looking at about four minutes of hot water remaining. If you want to loll in your own 15-minute shower, you’ll need to wait 47 minutes before stepping in. (Gas units heat faster, so multiply by 1.9 instead of 4.3.)
How much does it cost to service a tankless water heater?
Common Tankless Water Heater Repair Issues Professional repairs are typically required, and those often run somewhere between $150 to over $800, though the average tends to hover around $600. Tankless water heaters require periodic flushing to keep mineral and sediment from building up inside the unit.
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 much should I pay for a tankless water heater?
How Much Do Tankless Water Heaters Cost? Tankless water heaters are more expensive than storage water heaters, and the units alone can cost anywhere from $1,000 to $3,000. The final price will likely be in the $2000 – $4500 range including installation.