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dougrainer

Carrolton, Texas

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Posted: 06/21/22 01:58pm Link  |  Quote  |  Print  |  Notify Moderator

ernie1 wrote:

I've had a Truma od water heater in my 2018 rv for four years and have had zero problems with it and plenty of continuous very hot water. Certainly hot enough to be super uncomfortable and maybe cause an injury. Dunno about others but am I just lucky?


Truma is a higher line of On Demand(Germany) and has a better track record. Truma replacement would require running the control communication cable to a spot inside for the wall mount control. Truma's also require once a year decalcification, kind of a pain to do, just time consuming, not hard. Doug

valhalla360

No paticular place.

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Posted: 06/21/22 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

ernie1 wrote:

I've had a Truma od water heater in my 2018 rv for four years and have had zero problems with it and plenty of continuous very hot water. Certainly hot enough to be super uncomfortable and maybe cause an injury. Dunno about others but am I just lucky?


What weather conditions are you using it under?

If the average temp is in the 80's, your fresh water tank is likely feeding it water in the 80's, so it only needs to raise the temp by around 25 degrees to feel hot.

If you camp in cooler weather, the fresh water tank may be feeding it 40-60f temp water and it will have to raise the temp by 45-65 degrees to get the same temp.


Tammy & Mike
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Gdetrailer

PA

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Posted: 06/21/22 02:10pm Link  |  Quote  |  Print  |  Notify Moderator

wildtoad wrote:

I’ve never understood how a small OD wh can provide adequately (subjective I know) hot water for a high flow requirements of a shower, especially during the colder months.


With modern day water standards there is no such thing as a "high flow" shower.. 1.5 to 2.5 GPM is pretty much the water flow standard unless you have done something to modify the shower head for full flow..

FLOW RATES

"Flow Rate Restrictions

Since 1994, federal regulations have limited shower head manufacturers to a maximum flow rate of 2.5 gallons per minute (gpm). California has enacted its own legislation limiting the flow rate to 2.0, which will be reduced even further, to 1.8 gpm, in July 2018. Water flow regulations save billions of gallons of water each year while the latest technologies help preserve or even enhance your shower experience. There’s no need to suffer a substandard showering experience just because of regulations.

The engineers at Delta Faucet believe that environmentally friendly design shouldn’t compromise optimal performance. Before the restrictions, shower heads typically used 5.5 gpm. Restricting the flow to 2.5 gpm led to a new generation of water-saving shower heads. The change in flow rate is particularly noticeable if you go from a shower head produced before 1994 to a modern model. With consumer satisfaction in mind and knowing how important a good showering experience is to customers, the Delta Faucet engineers got to work."


2.5 GPM is nothing, my water well at 45 PSI supplies 11 GPM but the restrictive regulations the shower and faucet manufacturers must follow prevents my shower head from supplying more than 2 GPM at 45 PSI.. Perhaps at 60 PSI (city water pressures) I might get 2.5 GPM.. I would not call 2.5GPM or less to be "high flow" by any means.

wa8yxm

Davison Michigan (East of Flint)

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Posted: 06/21/22 03:19pm Link  |  Quote  |  Print  |  Notify Moderator

Fire19 wrote:

I need to replace my 20 year old water heater in my Fifth Wheel. I am wondering if the On-Demand heaters are a good choice? I currently have a suburban 6 Gallon SW DE. or it just better to stick with the Tank water heaters ?

Thanks


That... is a good question.. So here are some talking points.

ON-Demand RV heaters are Propane only because you don't have the Wattage to heat water that fast.

And if you sometimes camp in cold weather.. Since they do not heat without flow... Well that can cause an issue (If I were making one for RV use I'd offer a optional "Do not allow to freeze" heater.. lower wattage. (perhaps 100 electric or alt propane) set to say 40 degrees)

And though I tended to follow warm weather... i got bit by sub freezing a few times... (like 3) the 3rd time I learned how to spend no money (Though a PEX line did freeze.. in the middle of an 8 foot run. the fittings on the ends (Which do not freeze well) were protected so total damage was $0.00)


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


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