and you're both being moronic. The term comes from back in the day when buildings used boilers to heat water for heating by circulation through radiators and water for home use, or as they called it "domestic hot water." Later, when the systems were separated, they had heaters to provide the domestic hot water, and called them domestic hot water heaters. When steam heat fell out of use, there was no longer a need to differentiate between the two uses, and we shortened it to "hot water heater."

Your pedantic friend.

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Posted by AlxTgr

Kyre Banorg

Member since Oct 2003

86229 posts

Posted on 12/19/24 at 3:58 pm to Nodust

quote:
Less gpm with tankless?

There time involved in start up and delivery. It may not be much, but it's a tad slower than a tank holding already hot water. The shortest run in our house is fairly quick, but nothing like a tank.

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Posted by TheBoo

South to Louisiana

Member since Aug 2012

5332 posts

Posted on 12/19/24 at 4:18 pm to AlxTgr

It takes us about 5-10 seconds for ignition, burn, and temp rise when hot water is demanded, depending on incoming temp. Add that onto the length of the run and it seems like a long time.

Our new tankless is now completely across my house from my kitchen sink, and during the winter it takes about 4 minutes for hot water to reach the sink. I installed a recirc pump under my sink that uses the cold water line as the return. It worked wonderfully until it broke about 6 months later. Was thinking of either going with a 4 gallon expansion tank under the sink, a point of use 120v heater under the sink, or replacing the recirc pump.

This post was edited on 12/19/24 at 4:20 pm

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Posted by Ace Midnight

Between sanity and madness

Member since Dec 2006

94593 posts

Posted on 12/19/24 at 9:46 pm to Thecoz

quote:
be sure I understand I need electricity to keep the computer running.. no electricity.. no hot water

I think this is a potential application for a uninterruptible power supply. I would have concerns with one in the attic, as the operating conditions are harsh and that would be a (potentially) flammable battery in such harsh conditions.

But, in the conditioned space, it might make sense.

On the other hand, a backup generator provides power in an outage as well.

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Posted by SaintEB

Member since Jul 2008

23525 posts

Posted on 12/20/24 at 7:15 am to Ace Midnight

Thanks everyone for the suggestions. There were a couple of things about the tankless that I didn't think about or see anywhere else.

I think I'll just go back with a tanked heater.

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Posted by CAD703X

Liberty Island

Member since Jul 2008

90895 posts

Posted on 12/20/24 at 9:42 am to SaintEB

quote:
I think I'll just go back with a tanked heater.

a well implemented gas-fed tankless heater setup is pure magic.

...so is an inexpensive swap out to a brand new 80 gallon tanked heater.

our current house put us back to a tank and its also brand new (installed about 3 months before we bought the house) so there is zero chance we'd try to swap for a tankless...but having said that and having had a well designed tankless at our previous house complete w/ 'smart' recirculation, i can say with 4 family members who are also part duck, it was a Godsend.

This post was edited on 12/20/24 at 9:44 am

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Posted by LSUDad

Still on the move

Member since May 2004

61750 posts

Posted on 12/23/24 at 12:53 pm to SaintEB

Tankless, want to never go back to a tank. I have two kitchens, 4 baths in my house, we never run out of hot water. Plus tankless are way more efficient. If the tank is in the attic, why would you want to stand a chance of a burst of the tank?

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