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Old 07-20-2017, 02:18 PM   #1
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Tank less water heaters

What experiences have you had with tank less water heaters? More rv's are coming with these standard. Are they good or bad? I would like to hear others experiences!
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Old 07-20-2017, 02:43 PM   #2
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We have Precision Temp unit. Works well.

Had one problem where it froze and was spraying water because the heating pad quit. The company was great on the phone to troubleshoot and sent improved parts without charge.
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Old 07-20-2017, 03:16 PM   #3
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Do a search. Some people love them. Most people learn to hate them.
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Old 07-20-2017, 05:35 PM   #4
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My DW and I are presently in the second group with a Girard tankless. What a PITA!!!
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Old 07-20-2017, 05:41 PM   #5
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We have Hydro-Hot heat and tankless hot water, we love the HH. Endless hot water.

Al Sawyer
'05 Mt. Aire
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Old 07-21-2017, 01:15 AM   #6
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We have an Atwood tankless on our coach.

When it works, it's alright, but never good. Water waste is unbelievable, because we spend most of the time in the shower trying to find that happy spot between scalding and shooting snow flurries out the shower head. And that sweet spot is never the same. When we're boondocking we don't even try; we stick with lukewarm navy showers to conserve precious holding tank space.

And that's when it's working. Which is only about 40% of the time.

I haven't given up on tankless, but I will avoid Atwood's pathetic version in the future.
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Old 07-22-2017, 08:42 AM   #7
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Have a Girard in our 2015 Class C.
Hated it.
Wouldn't light half the time.
Fixed that with dry lube spray on sail switch pivot point.


Another problem that jrocker stated, "Water waste is unbelievable, because we spend most of the time in the shower trying to find that happy spot between scalding and shooting snow flurries out the shower head".


Solved that problem.
1) installed an adjustable flow valve on shower hose. Adjust for flow I want to conserve water and have a reproducible flow of water. Water flow will change temperature of water from water heater.
2) Adjust water heater for comfort with 100% hot water regular shower valve on.


3) We dry camp mostly and turn on shower to wet down, turn off shower to soap up and back on to rinse. Shutting down turns off heater and when turning on again you get a rush of cold before the heater cycles.


Solution: took output from low point hot water system valve (winterizing drain) and plumed to fresh water winterization drain. Adjust low point drain valve to just get the hot water heater to start. Now with water pump on, you will have constant recirculating hot water through the hot water system.
When shower is turned off to soap up and back on to rinse, steady hot water temperature.


I plumbed in two PVC valves, one to turn on the recirculating system (turning off returns to normal operation so the water pump will stop), and the other to drain the fresh water tank.


Another possible benefit is while the recirculating system is in operation, you are putting hot water into the fresh water tank. Could come in handy if caught in freezing weather.
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