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Old 10-25-2018, 02:22 PM   #1
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How does a Atwood XT water heater make more hot water?

Trying to decide on a water heater

The standard Atwood 10 Gal heater says it is 10,000 BTU
The standard Suburban 10 Gal says it is 12,000 BTU

The 10 gal Atwood XT exothermal technology says it is like having a 16 gal
but is also rated at 10,000 BTU

So I am trying do decide if the XT is worth an extra $120 to $300

Would the suburban at 12K btu make hot water as quick as the xt?

How do they account for it working like a 16gal heater ?
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Old 10-25-2018, 02:36 PM   #2
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Quote:
Originally Posted by Dremel View Post
The standard Atwood 10 Gal heater says it is 10,000 BTU

The 10 gal Atwood XT exothermal technology says it is like having a 16 gal
but is also rated at 10,000 BTU

How do they account for it working like a 16gal heater ?
The Attwood water heater actually puts out water hot enough to scald you, but the water temperature is moderated by adding more cold water directly to the hot water output in a 10:6 hot/cold ratio. Thus you get 16 gallons of hot water at a safe temperature instead of 10 gallons of scalding water.


Quote:
Would the suburban at 12K btu make hot water as quick as the xt?
It probably makes hot water faster because of the higher BTU rating. But I've never used a Suburban water heater, so I don't know if it can heat using electric/propane/both the way that the Attwood can. The Attwood heats water very quickly if you turn on both the electric and propane heating elements at the same time.
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Old 10-25-2018, 03:38 PM   #3
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Great answer and right to the point....i only use the xt model and it works exactly as stated....regards, bob
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Old 10-25-2018, 07:49 PM   #4
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Thank you. I can understand that. Could not find info anywhere.
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Old 10-25-2018, 07:51 PM   #5
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Btw, the Suburban can use both propane and electric at same time.
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Old 10-25-2018, 09:41 PM   #6
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Just a heads up...be informed


http://www.airforums.com/forums/f445...ml#post2172325


we have a 2014 with an Atwood WH and all has been fine. Seems the boards relate to the newer models
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Old 10-26-2018, 09:42 AM   #7
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Water heater

After all these years of doing this I find itís the capacity that matters. 6 gal verses 10 gal.
Iíve never had a complaint w any 10 gallon unit.

My Moho has a dual fuel 10 gallon and Iíve never run out of hot water.
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Old 10-26-2018, 01:20 PM   #8
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Originally Posted by Dremel View Post
Thank you. I can understand that. Could not find info anywhere.

I think that you can find the full explanation at the Atwood website docs.


They do as described above by over-heating the water in the tank, then mixing it with cold water on the exterior of the tank. This is only for the XT models though, as stated above.


XT owners - note that the mixing valve requires maintenance, cleaning, de-calcifying every year or so.


And it will need to be replaced after a few years. Atwood & other suppliers sell them at $79 - $179+ - so shop around.



They have a new maintenance sheet on the website which was probably updated since most folks bought their Atwood XT or trailer with it in. So go there & download & print out the new one.


If your hot water starts coming out too hot or too cold, or runs for a few seconds/minutes then stops or goes to a dribble or too cold - that means its time to clean or replace the mixing valve.



It drove me crazy for a year not knowing why it ran for 5 seconds then dribbled cold, until I found these topics on here:


http://www.airforums.com/forums/f240...ml#post2083068



http://www.airforums.com/forums/f445...ml#post2081532





Also good info -



http://www.irv2.com/forums/f116/atwo...lve-65423.html



http://www.irv2.com/forums/f116/atwo...ir-105558.html





PS - We do have the Atwood XT10 10 gal & it does seem to last for hot showers much longer than a standard 10 gal, & that is since May while my wife & I are using our trailer's facilities for showers etc. while our 1921 home is being repiped!


Cheers!
Tom
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Old 10-26-2018, 02:42 PM   #9
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Thanks for the info Tom.

"I think that you can find the full explanation at the Atwood website docs."

Well, it is Dometic's site now and they do not show anything that I can find. Maybe it is buried deep.

I really do not like their site. I will be looking for a stove, they show one picture of the stove. show me inside, show me a closeup of the burner, etc. etc. So many model's show a real comparison table.
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Old 10-27-2018, 12:24 AM   #10
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Quote:
Originally Posted by Dremel View Post
Thanks for the info Tom.

"I think that you can find the full explanation at the Atwood website docs."

Well, it is Dometic's site now and they do not show anything that I can find. Maybe it is buried deep.

I really do not like their site. I will be looking for a stove, they show one picture of the stove. show me inside, show me a closeup of the burner, etc. etc. So many model's show a real comparison table.

Wow - all of my links from just April/May 2018 are now redirected to their new Dometic website, which is REALLY dumbed down! I agree, what a horrible website. This is the super-sized Millennial don't bother me with the facts & details website!



Anyway, I did down load the parts lists & operating manual for the pre-Dometic XTs, if anybody needs to do their mixing valve, but if you buy the kit for your model, it'll include all hoses, a new shut-off valve, mixing valve & those documents. Just email or PM me & I can email it/them as an attachment.


Also, if you're buying, then Dometic may have provided their dealers with the brochures & spec sheets. If not - write & complain to Dometic about their crappy website & lack of any details.



Cheers!
Tom
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