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Old 02-23-2016, 08:10 AM   #1
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Location: Retired Military, 2015 Ram 2500 Cummins Longhorn Laramie 4x4, Waiting on lotto to hit! :)
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W/H upsize??

has anyone done an upsize from a 6gal to a 10 gal or a 10 gal to a ???, is this possible or is there just not enough space in the compartment to allow for a slightly larger unit??

OR has anyone used those loft areas or their garage to install a house water heater/tankless to actually be able to have enough HOT water while bathing???

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Old 02-24-2016, 11:54 PM   #2
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Suburban Water Heaters
  • 6 gallon water heater features 12000 BTU's and is 12-11/16" H x 12-11/16" W x 19-3/16" D.
  • 10 gallon water heater features 12,000 BTUs and is 16-7/32"H x 16-7/32"W x 20-1/2"D.
  • 12 gallon water heater features 12,000 BTUs and is 16-7/32"H x 16-7/32"W x 22-1/4”D.
Atwood Water Heaters
  • 6 gallon water heater features 8800 BTU's and is 12-1/2"H x 16"W x 18"D.
  • 10 gallon water heater features 10000 BRU's and is 15-1/2"H x 16"W x 20-13/16"D
Atwood XT Models
Use a higher temp t-stat and a mixing valve
6 gal/tank----9 gal equivalent OR 10 gal/tank-----16 gal equivalent
Opening are same as standard 6 & 10 gal but require more depth due to mixing valve mounted on rear

  • 6 gallon water heater features 8800 BTU's and is 12-1/2"H x 16"W x 19"D.
  • 10 gallon water heater features 10000 BRU's and is 15-1/2"H x 16"W x 20-3/4"D

IF WH is a combo unit (electric & gas) turn BOTH on for fastest recovery

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Old 02-25-2016, 12:14 AM   #3
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Since Old Biscuit posted the dimensions I guess you need to measure the available space and see what will fit. Our last rig had a 10 gallon unit and we never lacked for hot water although I did put in a different shower unit.
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