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Old 06-06-2015, 05:03 AM   #1
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Electric & Gas Water Heater Recovery Time

When we traded in our old 18-footer for Rocky, our PDI introduced us to the dual water heater. (Heats the water with both electricity and with propane.)

I asked him if I used both would it work (recover) faster and he said, "Absolutely not, that's a common myth among RVers."

I've never, actually, tested this but was wondering what the consensus is amongst y'all?
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Old 06-06-2015, 05:33 AM   #2
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Using both at same time will recover much faster. Did not actually timed it but when I had 6 people using shower one after another, I did not ran out of hot water as when only on electric after 3 showers water started to get cold.......

https://www.google.ca/search?q=recov...BoeoyASij4KgCg
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Old 06-06-2015, 06:28 AM   #3
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Personal experience: recovers faster with two heat sources.

Should make sense since there are two different heat sources working to raise the temperature at the same time. It will NOT make the water "hotter" since the independent thermostats determine when they shut off and they are set to the same temperature.
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Old 06-06-2015, 07:42 AM   #4
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Hot water

With both gas and electric my wife can now enjoy her shower . Remember not to turn on the electric until there is water in the water heater .😃
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Old 06-06-2015, 08:11 AM   #5
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Quote:
Originally Posted by ColoradoRick View Post
When we traded in our old 18-footer for Rocky, our PDI introduced us to the dual water heater. (Heats the water with both electricity and with propane.)

I asked him if I used both would it work (recover) faster and he said, "Absolutely not, that's a common myth among RVers."

I've never, actually, tested this but was wondering what the consensus is amongst y'all?
If you see this PDI person again, you need to see if he will contact the manufacturers, so the builders of these water heaters will quit perpetuating this "myth". What would they know, huh?

Suburban's website (emboldened below):

Airxcel | Suburban Manufacturing Products
  • Faster Recovery


    Fast recovery means more hot water and fewer cool water cycles. Six-, 10-, 12- and 16-gallon Suburban gas water heaters feature 12,000 BTUH input and a recovery rate of 10.2 gallons per hour - that's the fastest in the industry. Combination gas/electric models also use a 1,440-watt element to recover an additional 6.0 gallons per hour at campsites. For higher recovery, both the gas and electric element may be used simultaneously.

  • Suburban also uses a copolymer insulation jacket specially molded to fit the tank. This does a better job of retaining heat than the "cardboard" style used on some competitive models.
  • Examine some of the many options available with Suburban Water Heaters.
  • View the specifications for all of our Water Heater models.
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Old 06-06-2015, 08:24 AM   #6
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To add to my above post, Atwood even has a recovery chart in their water heater brochures that shows the amount of water heater recovery on electric, or gas, or the combination.

http://www.atwoodmobile.com/images/waterheater.pdf

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I would have to doubt the PDI's person training if he made a comment like that. Here is a FAQ on the operation of Suburban water heater, just so you can check to see if he was trained correct on it too.

Suburban's electric switch and much more
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Old 06-06-2015, 09:04 AM   #7
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How would one turn on both heating sources? (RW MiniLite 2306)


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Old 06-06-2015, 09:18 AM   #8
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Quote:
Originally Posted by 53flattie View Post
How would one turn on both heating sources? (RW MiniLite 2306)


2015 Rockwood 2306
2006 Toyota Tacoma
If you have the Suburban, it in the last link in the post right above yours.

'Suburbans electric switch and much more'
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Old 06-06-2015, 01:37 PM   #9
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Colorado Rick...Fonzie is right on. I've been doing it for years. It is faster with both on....BUT...do keep in mind like Camping Baba said.....never turn on the electric until the heater is full. AND,,,keep in mind,,,,,if you fill it without opening a hot water line in the RV to bleed out air,,,,it'll ruin your day when your element smokes. Look into a sacrificial anode too. They're great to preserve the walls of a heater. I use them on ALL my heaters regardless of whether they need them or not. They ALL need them,,,,,the ions in the water eating up the anode instead of the heater is the proof in the pudding.
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Old 06-06-2015, 02:00 PM   #10
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Best way to bleed the air out of the water heater is by the pressure relief valve located at the top of the wh compartment.
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