These are great to have in any home

Instant on hot water that is continuous. They have been improving a lot and we are seeing them in more new construction.

This is a horrible idea that people have been pushing.  You have a limited amount of water, often not enough for a shower.  In the event of an earthquake, you nolonger have 30-75 gallons of drinkable water at your disposal.

If I find a house with them, I rip them out.  If I'm showing a house with one, so far every buyer has not wanted to buy the house BECAUSE of it!

Tankless or On Demand hot water heaters simply heat the water as it's needed. I've had mine for 16 years and it has saved me a ton of money. Plus we never run out of hot water.

It does not hold water in a tank and continue to keep it hot but heats it on demand. It saves energy and is very quick to heat it instantly. We have two in our house.

Barbara,

It is wonderful and it does not waste water!  The water is at the right temperature for a shower.  A

I see them here on occasion.  

Barbara Todaro - I think it is mandatory for new construction - in MA at least. And it replaces the big water heater tanks. (This was simple.)

We see a lot of them down here, and people who have them love them.  It takes far less time for the water from the faucet to warm up, and you won't run out of hot water.

One without a tank and one that always has hot water. Love them.

They are also called on demand water heaters.  They heat water as you need it and have no reserve.

I think that the name says it all.  Heats the water as it passes through rather in a tank.

With the few homes that I have seen it in here, it drives the home price up.

Wow. I actually know the answer. It is becoming very popular in all the new constructions in our area.

They don't work.

Very efficient if natural gas is available.  What options exist for electric or propane?

Not many people use here and our head of construction thinks at this time the maintence is too high!

Barbara Todaro 

I saw it in Japan over 25 years ago. Hot water by gas or bottled gas on demand. It took a long time to get these low flow Toto toilet and tankless over here. I think the price is too high....

It is a system usually run by gas that heats the water without the use of a tank. I once had one and loved it.

I have one LOL - installed it beginning of the year - helped cut my Electric bill by 1/3!!!

After my water heater blew out and drained all the water out, it became a tankless water heater.

A proven technology, used widely in many countries, that aligns with the common sense of not heating water when you don't need hot water.

Incredibly economical to install, and when natural gas is available, cheap to run. For those homes with 2 bedrooms, even the electric tank-less will prove economically beneficial. 

Be aware, when long runs are involved, you will still need to run the water, just like with a tank system, to find the hot water. However, they are so inexpensive, one can place the tank-less closer to the user.

Over ten years of experience and no one is ripping out a tank-less to put in those space hogs.

I think they are a good idea.  

Barbara Todaro No holding tank for the water. I think the question is whether they are cost effective.

It is a water heater without any gratitude, appreciation or "tanks". Tank U

A water heater that is unappreciative!! 

An expensive waste of money that does not perform as advertised! Give me the tank!

Yes, it is too easy.  Dare I even say it is a water heater without a tank. I am not a fan of them.

What I need and will get once it is time for a new one. Nothing better than hot water on demand, no running out and much less expensive than a traditional water heater

Barbara Eden and Ann Montgomery had it first with a blink of an eye or nose.

Instantly heat water without a tank maybe saving money.

We started to convert but decided we'd lose money in a tankless investment if we relocate.

I was going to say me after Sandy feeds me beans, but that is actually an old bag of hot air. I am very popular in Albuquerque during the balloon festival though!

Some like instant hot.