If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

wrote in message
...
If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?


No.

Eisboch

On Jan 29, 8:24*pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

On Thu, 29 Jan 2009 17:32:38 -0800 (PST),
wrote:

On Jan 29, 8:24*pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

My air conditioner in the travel trailer requires 110volts. The built in
heater is propane fired, although there is a heating element in the A/C for
taking the chill off.

We take a small electric heater on trips and use the electricity we've paid
for from the campground.
--
John H

For a great time, go here first... http://tinyurl.com/d3vxvm

* Definition of a teenager?
God's punishment...for enjoying sex. *

wrote:
On Jan 29, 8:24 pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?
No.

Eisboch

So how do they air condition boats and campers?


When you say "air condition," I assume you mean cool and heat.

There are several ways to do either on a boat through separate systems
or both through a device like a home heat pump.


The current draw can be substantial. Some boats have systems that can
only be used when the craft is tied up at the dock and using shore
power. Some boats have generators that provide all the power that is
needed. I suppose a compressor can be hooked up to a boat's main engine
for AC, but I've not seen that, and it would require the main to be running.

The first Parker I ever saw, at a Florida boat show, had an AC unit on
the cabin roof. Looked like a unit from a camper. It was driven by
dockside electrical power.


Heat can be simpler. Heat from the engine's cooling system can be
radiated into the cabin through air or water heat transfer so you have
heat as long as the engine is running.

On Jan 29, 8:09*pm, wrote:
If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

Get yourself an old Bus, or conversion van rear heater. You can run
lines off the motor for heat, but as for cooling...nada.

wrote in message
...
On Jan 29, 8:24 pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

My smart ass answer was because you said "runs on 12 volts". You would
have to have a battery bank the size of the boat to have enough amp capacity
to run a heater or air conditioner for very long. A small AC unit will draw
roughly 8 amps at 120 volts, so figure more than 10 times that using a 12
volt compressor (if they made one) or running it from a 12vdc to 120vac
inverter.

Generating enough heat BTU's would be a similar current draw. 12 volts is
simply unrealistic.

Air conditioners on boats or campers run from either 120 volts and in rare
cases, 220 volts.
The power is supplied from a genset or shore power.

Campers usually have either a heat strip in the AC unit and/or propane
heating systems.

Eisboch

Eisboch wrote:

wrote in message
...
On Jan 29, 8:24 pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

My smart ass answer was because you said "runs on 12 volts". You would
have to have a battery bank the size of the boat to have enough amp
capacity to run a heater or air conditioner for very long. A small AC
unit will draw roughly 8 amps at 120 volts, so figure more than 10 times
that using a 12 volt compressor (if they made one) or running it from a
12vdc to 120vac inverter.

Generating enough heat BTU's would be a similar current draw. 12 volts
is simply unrealistic.

Air conditioners on boats or campers run from either 120 volts and in
rare cases, 220 volts.
The power is supplied from a genset or shore power.

Campers usually have either a heat strip in the AC unit and/or propane
heating systems.

Eisboch


Heat pumps too.

"Jim749293432" wrote in message
...
Eisboch wrote:

wrote in message
...
On Jan 29, 8:24 pm, "Eisboch" wrote:
wrote in message

...

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

My smart ass answer was because you said "runs on 12 volts". You would
have to have a battery bank the size of the boat to have enough amp
capacity to run a heater or air conditioner for very long. A small AC
unit will draw roughly 8 amps at 120 volts, so figure more than 10 times
that using a 12 volt compressor (if they made one) or running it from a
12vdc to 120vac inverter.

Generating enough heat BTU's would be a similar current draw. 12 volts
is simply unrealistic.

Air conditioners on boats or campers run from either 120 volts and in
rare cases, 220 volts.
The power is supplied from a genset or shore power.

Campers usually have either a heat strip in the AC unit and/or propane
heating systems.

Eisboch


Heat pumps too.


Forgot that. Reverse cycle combination AC and Heat. But not for 12vdc.

Eisboch

On Jan 29, 10:08*pm, "Eisboch" wrote:
"Jim749293432" wrote in message

...





Eisboch wrote:

wrote in message
....
On Jan 29, 8:24 pm, "Eisboch" wrote:
wrote in message

....

If you have a small cabin on a boat can you get a small heat exchanger
that heats in winter and cools in summer that runs on 12 volts? What
kind of system would you use?

No.

Eisboch

So how do they air condition boats and campers?

My smart ass answer was because you said "runs on 12 volts". * You would
have to have a battery bank the size of the boat to have enough amp
capacity to run a heater or air conditioner for very long. *A small AC
unit will draw roughly 8 amps at 120 volts, so figure more than 10 times
that using a 12 volt compressor (if they made one) or running it from a
12vdc to 120vac inverter.

Generating enough heat BTU's would be a similar current draw. * 12 volts
is simply unrealistic.

Air conditioners on boats or campers run from either 120 volts and in
rare cases, 220 volts.
The power is supplied from a genset or shore power.

Campers usually have either a heat strip in the AC unit and/or propane
heating systems.

Eisboch

Heat pumps too.

Forgot that. *Reverse cycle combination AC and Heat. * But not for 12vdc.

Eisboch- Hide quoted text -

- Show quoted text -

Ok, so I need to run a generator, no problem, I have one. What's the
best way to go from there? I see a lot of stuff out there on Google,
any hints about configurations and brands.. I am much more concerened
with cooling than heating. Heating I can figure out later...