Water heaters

[Zephod]

I'm looking at electric water heaters. I've not put gas into my bus other than a Coleman camp cooker. That'll work for everything when I'm not plugged in.

I wired for a 30A inlet. I've got a socket for a dorm fridge (probably 5-7A) and two spare sockets. I'm toying with the idea of putting this tankless water heater in (http://www.mytanklesswaterheaterstore.com/eemax-sp2412-single-point-electric-tankless-water-heater-120v-2-4kw-20a/). I can easily wire in a 20A cable to a 20A breaker on my breaker box. I figure if I'm plugged into water then electricity will be available.

I'm thinking this would work for the handbasin and the shower. It doesn't have to be very warm water. Just as long as it takes the chill off cold water for showering. I could put it under the handbasin and have a second water line heading down and under the floor to the shower.

The question is... has anybody found a 15A version? I'm not after really hot water. Luke warm is fine.


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[ol713]

    HI;
       I used a 3gal water heater from Home Depot.  It runs on a 15 amp
       breaker.  It provides some hot water, can't do too much until it
       runs out.  We also plug it in when on the road so we have hot water
       when we stop.  Just have to pay attention when power is available
       and when it is not.   Works for us.
                                              Merle. 

[Scott & Heather]

33°F  rise at 0.5 gpm...best for hand washing. Won't work well for a shower


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[Zephod]

33°F  rise at 0.5 gpm...best for hand washing. Won't work well for a shower


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It'll take the chill off the water. That's all I need.

Also... with a maximum 30A of power with 5-7A being used by a fridge, 20A is all that's left.

As fir water tanks... not really interested in the,.

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[J_E]

A low flow shower head may make that smaller on-demand heater a little more comfortable.

Bricor has a few.  This one says .625gpm @50psi.  http://bricor.com/products/ultramax/

[TomC]

In 1993, I bought 2-10gal electric water heaters from Home Depot. One is plumbed into the next with the final water heater wired through the inverter to have hot water going down the road. I use 2-10gal instead of one 20gal to have faster recovery. We've never run out of hot water even after 2 showers and washing dishes. Since 1993, I've done NOTHING to those water heaters except to drain them once a year.
I say this, because instant water heaters are known to be trouble some. Just get either a 6gal or 10gal tank type electric water heater from Home Depot and be done with it. They cost about the same. Good Luck, TomC

[Zephod]

I'm solely after instant water heaters. I think I've seen one online at 15A and about $180 which seems very steep for something that's essentially a tube with a heating coil wrapped around it.


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[Brassman]

For an effective on demand electric water heater you are going to need a lot more power than a 15 amp 115 volt circuit will give you. Just a waste of money, IMO.

[TomC]

I can tell you from experience, that instant water heaters are troublesome, need LOTS of electricity to run. Either a 6gal or 10gal electric water heater are just about trouble free. If the heating element goes out, you can get a new one for about $20 at HD. Save yourself a lot of grief and just use a normal electric water heater. Good Luck, TomC

[buswarrior]

And that water tank style heater can be run via an inverter while you go down the road, so free and silent hot water for camping on arrival, and happily stays hot for many hours afterwards.

For the same money, the chance for hot water at destinations without a power pole?

For that pleasure, it will fit in somewhere.

happy coaching!
buswarrior

[Oonrahnjay]

And that water tank style heater can be run via an inverter while you go down the road, so free and silent hot water for camping on arrival, and happily stays hot for many hours afterwards.  ...

     Or a simple loop of plain copper pipe about 16" long (effective length - it will have to coil or bend but that's easy) connected to radiator coolant will give you *super hot* water for free.  Add it to a tempering valve so 6 gallons in the heater will give you 12 gallons of hot-shower-temp water.
     But he's not looking for anything like that. 

[j.m.jackson]

Here's another way to look at it. 15 amps of 120v power is 1800 watts. How much of a rise in temperature are you going to get with water moving past an 1800w heating element in an 'on demand' water heater?

[windtrader]

It seems on-demand water needs more power as it has to heat water very quickly. A water storage tank can heat water much slower so less demanding on energy draw. For electrical supply @110, it seems unrealistic to use on-demand. Propane on-demand should work fine for judicious use of hot water.

[Utahclaimjumper]

 Why waste your time confusing the issue with facts,, the man has his mind made up.>>>Dan

[Scott & Heather]

This one from Home Depot is $159
http://www.homedepot.com/p/AquaPower-120-Volt-1-8-kW-0-27-GPM-Compact-Point-of-Use-Tankless-Electric-Water-Heater-AQM-2-1/206642687?cm_mmc=Shopping%7CTHD%7CG%7C0%7CG-BASE-PLA-D26P-WaterHeaters%7C&gclid=Cj0KEQjwmv7JBRDXkMWW4_Tf8ZoBEiQA11B2fn_i2gbHsV0-PJuYwR-L8SiKkUbo1XbgAprrNLKBf5caAtbC8P8HAQ&gclsrc=aw.ds

Or this one from amazon:
Bosch T 2.5-Gallon Electric Mini-Tank Under Sink Water Heater https://www.amazon.com/dp/B0148O658Y/ref=cm_sw_r_cp_api_SCgqzbWS3JXAP


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