-For what it's worth, I called the distributor in Vermont for Aqua Star
(800-642-3199) by Bosch (no small German manufacturer) on the 38B LP 40,000
btu instant-on water heater. They faxed me the features, mounting,
combustion air requirements and clearances for the unit. (can get at Home
Depo special order dept. $270.00)
Although they cannot "recommend" using this unit in an RV trailer--their
only concern is "air make-up" as the heater can pull fresh air from the
living quarters. When I said the unit would be mounted where the existing
water heater is located with fresh air availability, they got less
concerned.
Anyway, this unit regardless of which way you lean--sounds like a slick
piece of machinery. (stainless, copper, auto protection, etc.)
Steve C
'69 Caravel TC, Mich
----- Original Message -----
From: "John and Jodi Guerin" <[EMAIL PROTECTED]>
To: "Multiple recipients of VACList" <[EMAIL PROTECTED]>
Sent: Tuesday, March 20, 2001 11:17 AM
Subject: [VAC] Re: Tankless water heaters: travel time to tap?
> My experience is that with the hot water heater in the same location as
our
> previous water heater, the delivery time is about the same. You might
have
> literally one or two seconds before the gas kicks on, but otherwise it is
> the same. Also, if you're standing at the sink turning the hot water on
> and off, like for washing dishes, the pipes fill up with hot water as they
> do with a traditional water heater, and the hot water is there immediately
> when you turn the faucet back on. Of course if you let it sit for a while
> it will cool down (the water in the pipes that is.). I have to say that
> while I haven't used one of these units in a trailer I am a convert when
it
> comes to using them at home. Also, the space savings are quite
substantial
> in our home. It allowed us to put everything, including storage in a very
> small furnace closet. I would be interested to know what the actual size
> of the RV units is. Are they larger or smaller than normal water heaters?
> Jodi
> Laramie, WY
>
> At 10:49 PM 3/19/2001 -0800, you wrote:
> >John: I think it was Tuna? who said that given the short distances
> >between tank
> >and heater in an A/S, a tankless unit might actually pass more water
> >through before
> >delivering hot water as it can take a while to bring the water up from
> >whatever the
> >ambient is, whereas a tanked heater has only the amount of water in the
> >pipes from
> >tank to fixture before it delivers hot water. My experience with
tankless
> >heaters
> >was in England and there they tended to be placed just above the place of
use,
> >e.g., kitchen sink, bathtub, and even there, it sometimes took a while to
get
> >actual hot water out of them. What's been your experience in terms of
> >time for
> >delivery to tap in your home: faster than from the tank unit, noticeably
> >slower,
> >what? In California there is no such thing as an "unlimited" water
supply
> >even
> >when you're hooked up. Well, there is, in meter-free Sacramento for one,
> >but I'm
> >speaking rainfall-wise here.
> >
> >--Sarah
> >
> >John and Jodi Guerin wrote:
> >
> > > I think the advantage in an RV is not ever running out of hot water.
Of
> > > course that would mostly be in situations where the water is in
unlimited
> > > supply. As for a home I KNOW that the savings is real. We use about
a
> > > third of the gas to power our tankless hot water heater compared to
the old
> > > one, which was just an ordinary hot water heater. Also, I never have
to
> > > wait for the water to reheat before I take a shower, run the
dishwasher or
> > > clothes washer. The third advantage is that these things have very
little
> > > parts that ever need replacing because you are removing the corrosion
prone
> > > tank of water. I paid about $600 for mine and have probably have more
than
> > > recouped my money's worth with the gas price hikes. Oh, and by the
way, I
> > > never have a shower where I wish the flow was stronger, in fact it's
better
> > > flow than most regular showers I've been in. True Story.
> > > Jodi
> > > Laramie, WY
> > >
> > > PS, we also have a "clothes processor", the kind that washes and dries
in
> > > one unit and doesn't have to be vented. Talk about New Age...
> > >
> > > At 10:13 AM 3/19/2001 -0500, you wrote:
> > > >Robert (and others),
> > > > What is the REAL-WORLD advantage to tankless water heater? The
problems
> > > >you cite in an RV situation look like very real disadvantages to me.
> > > >
> > > >I personally can't much see the supposed advantage in a home
> > > >installation, either. The big claim to fame is the lack of heat loss
> > > >from the normal water heater tank, but I've shut off the power to my
> > > >electric heater in the shop and found the water just about as hot 24
> > > >hours later. It's still warm 48 hours after the power's been off, and
> > > >this is a heater that's over 30 years old. Presumably, the new
heaters
> > > >have better insulation and even less heat loss. If you used hot water
> > > >only very intermittently, say every other day, I could see a slight
> > > >advantage to a tankless outfit, but not the way most families live.
> > > >
> > > >Sorry to be a heretic, but in this case, I think the Emperor has no
> > > >clothes.
> > > >
> > > > <<Jim>>
> > > >
> > > >
> > > >Robert C Townsend wrote:
> > > > >
> > > > > As I understand it, the compressed air and demand pump systems
both
> > > > maintain
> > > > > around 35 psi... a good question and an important consideration,
> > though...
> > > > > however, for the kinds of hot-water use for which the tankless
> > systems are
> > > > > 'best', i.e. 'unlimited hot water', a city-water supply would
clearly
> > > > be the
> > > > > preferable source. In 'boondocking' situations - where one's water
> > > > supply is
> > > > > necessarily limited to what one carries with - the traditional
small
> > > > propane
> > > > > fired systems seem more suitable for 'navy showers', since the
> > initial cool
> > > > > water is that which is in the hot-water line between faucet and
> > heater...
> > > > > the tankless systems take a few extra seconds (pints? gallons?) to
> > get the
> > > > > water flowing through it up to temperature....
> > > > >
> > > > >-
> > > >--
> > > >
> > > > <<http://www.oldengine.org/members/jdunmyer>>
> > > > <<[EMAIL PROTECTED]>>
> > > > <<lower SE Michigan, USA>>
> > > > <<mailto:[EMAIL PROTECTED]>>
> > > >
> > > >
> > > >
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