Sure would be nice to do this in the GMC
http://www.tracker.net/blog/
http://mrerf.blogspot.com/
PROPANE SYSTEMS
ALDE SYSTEM - PROPANE/ELECTRIC
TECHNIQUE
HARDWARE
http://www.alde.se/
Tom Phipps
DIESEL SYSTEMS
VEHICLESYS DIESEL RV SYSTEMShttp://mrerf.blogspot.com/
PROPANE SYSTEMS
ALDE SYSTEM - PROPANE/ELECTRIC
TECHNIQUE
HARDWARE
http://www.alde.se/
Tom Phipps
On your changing to hot water heat, as in house baseboard
type. The P.O. (once removed) (Bill Harvey, of Denver, CO)
converted the coach that I now own to this form of hot water heat.
If you would like, I will take photos and send them to you for you
digital enjoyment.
He used the original hot water heater that came in the GMC
Transmode, or AVION. The heater uses either the engine hot water
or electric power for heating the circulating water. The
circulating water is isolated from the engine hot water. The
water tank acts as a heat transfer. He used black iron pipe and
standard house type finned baseboard heat strips and ran them around
the entire inside of the passenger area of the GMC. He installed
a 12 volt water pump to circulate the heated water thru the baseboard
heaters.
It does work. Driving across Kansas in July with this
unknown heating system was very warm. Finally found an off
switch. I have installed a heater cut-off valve in the lines from
the engine block to the rear heater. Not a lot of need for this
form of heater here, in Lower Alabama. Tom Phipps"Aunite Que"
DIESEL SYSTEMS
http://www.vehiclesys.com/aqua_hot.html
ESPAR HEATER SYSTEMS
http://www.tknw.com/Products/Espar/Hydronic4.asp
http://www.espar.com/htm/Specs/water/D4Wspec.htm
Marc Hogenboom's Diesel Primus system for the GMC ( look at all of Mark's wonderful GMC mods)
http://www.gmcmhphotos.com/photos/showphoto.php?photo=11442&size=medium
http://www.gmcmhphotos.com/photos/showphoto.php?photo=11443&size=medium
http://www.gmcmhphotos.com/photos/showphoto.php?photo=11444&size=medium
Look at Alde form Sweden, they now make
a system simular to the Primus wich is no longer available: http://www.alde.se/
These provide abour 20000 BTU's and are propane fired. There is also
Espar for Diesel als Gasoline fired heaters: http://www.espar.com/htm/Specs/water/wterheat.htm.
In my experience you do not need a huge
amount of BTU's when using a hydronic system, because the heater can be
burning moost of the time without being a nusance like air heating. No
noise, no wind.
The tank is small because the whole
system is waterfilled and circulating. The tank is only for expantion.
You could compare it to a On demand hot water system. That is why a
water heater is not a good alternative. No need to reinvent the wheel,
that has already been done a few hundred times.
I'm sure there are other manufacturers,
but I know these two will give you a good product. If you need
help, just ask .Marc
Cheap
Heater register by Red Dot Corp. in Washington found by Eric
Gibbons
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4559507296&category=50466
Detailed Specifications
http://www.rdac.com/Pages/product_pages/units_pages/270_unit.html
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4559507296&category=50466
Detailed Specifications
http://www.rdac.com/Pages/product_pages/units_pages/270_unit.html
I received the 24VDC Red Dot Corp. Auxiliary Heater yesterday.
They wouldn’t take my low-ball offers, so I paid the $39.99
asking price plus $9.21 shipping. I am glad I ordered it and will get
another for the rear, or for future propane/hydronic heating.
No documentation is provided with the product. Construction is of
high quality, suitable for use in a GMC Motorhome. The casing is a
heavy plastic. The blower is the dual squirrel cage type, and the core
is copper with aluminum fins. There are three wires terminating in an
automotive type plug,, which I quickly decided to cut off and replaced
with crimp-on bullet connectors. The three wires provide two blower
speeds. All my tests were conducted on the high speed.
Red dot’s spec for current is 7.7A @ 13.6VDC. That spec
is for the 12V unit. While this is a 24V unit, I gambled that it would
provide adequate airflow running off the unregulated alternator output
that the dash air blower runs off of when on high. I haven’t
measured this voltage, but expect to see 16-18VDC when I do. The
blower moves a lot of air at 24V voltage (2.2A) and is pretty noisy. On
12VDC it draws the expected 1A and still moves air. It ought to move
plenty of air at 16V. I won’t install this right away, but
look forward to the additional winter heat it will provide while on the
road.
Overall, this is a quality unit available at a great price. All
the others I’ve been able to find are at least $90. If
you’re thinking of adding an auxiliary heater, I’d
recommend getting one of these while their available. I’ll
post results and pictures when I get around to the project.
Red Dot has re-listed the unit. Here’s the link.
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