Electric heating

MrWizard wrote:
It's nice that it works
Nobody is saying it doesn't work

Only that you are confused on how it works

It's called a 'pump' because it moves heat from the outside air to the inside

It does Not extract heat from air inside to move it inside

You have a hose to the outside and that is where the heat comes from the 'outside' air

Think the Moderator is CORRECT.

It's called a 'pump' because it moves heat from the outside air to the inside.



This is the Science of the Heat Pump ....BUT....if the outside air is "Leaking into the Inside air" ...............then just maybe, you could be partially correct?

But sure seems as if it just may be Magic, as it goes against the Science of a Heat Pump.

But ........................(long pause) ......if you are happy with the way it works for you fine, not worth getting all excited about ..............(another long pause)........

So as my Granddaughter would say "Just Calm Down" Guy's

Sometimes we DO NOT KNOW ALL THE FACT's........Could it be that it is expelling/Pumping out the Cold Air?

JMHO,

JaxDad wrote:
A heat pump works by taking heat from the air in one place and moving it to another. Thus the term “pump”.

You cannot with a heat transfer pump take heat from a single space and put it back in the same space and end up warmer than before. Extra heat requires extra BTU’s, period.

If your unit is making heat without an external source of BTU’s it is from the parasitic (friction) losses of the pump and motor running.

The only concepts I can grasp are facts and science.

Magic and hokus-pokus are beyond me.

Portable heat pump/AC units have been produced and sold for decades with many happy buyers. Perhaps you should read how a single hose heat pump works. Be sure that you don't get confused between AC and heat pump operation.
As far as the brand of mine. It is an Spt but all single and double hose portable heat pump/AC units work the same way, except a double hose unit uses outside air.
My heat pump, with the single hose draws ambient air from the RV cabin. Some of that air is passed over the condensing coil, heated, and blown back out in to the RV. Some of the air taken in, BUT NOT ALL OF IT, is blown back out over the evaporating coil and is expelled to the outside, thus completing the entire refrigeration process.
My unit must have an INSIDE temperature of 45 degrees or higher to be able to function as a heat pump, since that is the only air it uses. At anything over 45 degrees, it will start warming the area as soon as you turn it on. If it warms the area to 95 degrees, then it stops working efficiently. We usually keep the inside of our RV at 65 in the Winter so the air being used by the heat pump is 65 degrees, regardless of the outside temperature.

A heat pump works by taking heat from the air in one place and moving it to another. Thus the term “pump”.

You cannot with a heat transfer pump take heat from a single space and put it back in the same space and end up warmer than before. Extra heat requires extra BTU’s, period.

If your unit is making heat without an external source of BTU’s it is from the parasitic (friction) losses of the pump and motor running.

The only concepts I can grasp are facts and science.

Magic and hokus-pokus are beyond me.

JaxDad wrote:


I’m not going to make this a long dissertation, but unless your heat pump is capable of extracting more BTU’s per CFM than than the incoming air contains, you’re losing heat, not gaining it.

A heat pump works by extracting the few BTU’s cool (cold?) air contains per cubic foot and it’s not a high percentage at all.

If it was a high percentage like you describe, nearly every house in America would have heat pumps.

I'm glad you didn't go in to a long dissertation because as far as I am concerned, it would just make you look like a fool.
I have several years experience using my single hose heat pump/AC unit to keep us warm in temperatures as low as -5. Apparently you cannot grasp the concept of what works and what does not work. Go quote your dribble to someone who may believe you. I'm done with it.

what is the make and model number of this portable heat pump~a/c

rgatijnet1 wrote:

JaxDad wrote:

rgatijnet1 wrote:
There are PORTABLE heat pumps that have ONE hose and some that have TWO hoses. The two hose units draw air from the outside and exhaust air to the outside and are limited by the outside temperature.

My single hose heat pump DOES NOT draw air from the outside at all, which allows it to operate at any temperature. The single hose is an exhaust and it only exhausts the cold air that it removes from the inside air.

If you are blowing X number of CFM out of your RV that much air must be entering from somewhere also.

Obviously that is right. My RV is not completely air tight. As I stated from several years worth of experience, my single hose heat pump has kept our RV comfortable in minus zero temperatures. Bringing in some outside air to keep the inside air fresh is a good thing for us and is a requirement for most residential and commercial AC systems.
I guess we have the best of both worlds, fresh air circulating and warm temperatures inside.
If you love your electric resistant heaters and want to live in stale uncirculated air, fantastic. To each his own. :B

I’m not going to make this a long dissertation, but unless your heat pump is capable of extracting more BTU’s per CFM than than the incoming air contains, you’re losing heat, not gaining it.

A heat pump works by extracting the few BTU’s cool (cold?) air contains per cubic foot and it’s not a high percentage at all.

If it was a high percentage like you describe, nearly every house in America would have heat pumps.

In a way a heat pump makes heat because the compressor pumps Freon from low to high pressure and creates hot fluid/gas which produces heat

Not goign to go to the trouble of a quote but Rga.. If it "Exhausts" cold air and does not suck in fresh air (Which by the way if heating will be colder than the outside) it's a vacuum pump, not a heat pump.

Again: A Heater converts some other form of energy (Chemical or electrical) to HEAT

A Heat pump Simply moves heat from Point A to Point B. Same as a water pump moves water from Point A to point B.

Why they are both called PUMPS. the water pump does not make water Nor does the heat pump make heat. Unliess there is a heat strip (electric heater) inside it and if that is the case it is a "heater" not a heat pump.

JaxDad wrote:

rgatijnet1 wrote:
There are PORTABLE heat pumps that have ONE hose and some that have TWO hoses. The two hose units draw air from the outside and exhaust air to the outside and are limited by the outside temperature.

My single hose heat pump DOES NOT draw air from the outside at all, which allows it to operate at any temperature. The single hose is an exhaust and it only exhausts the cold air that it removes from the inside air.

If you are blowing X number of CFM out of your RV that much air must be entering from somewhere also.

Obviously that is right. My RV is not completely air tight. As I stated from several years worth of experience, my single hose heat pump has kept our RV comfortable in minus zero temperatures. Bringing in some outside air to keep the inside air fresh is a good thing for us and is a requirement for most residential and commercial AC systems.
I guess we have the best of both worlds, fresh air circulating and warm temperatures inside.
If you love your electric resistant heaters and want to live in stale uncirculated air, fantastic. To each his own. :B

rgatijnet1 wrote:
There are PORTABLE heat pumps that have ONE hose and some that have TWO hoses. The two hose units draw air from the outside and exhaust air to the outside and are limited by the outside temperature.

My single hose heat pump DOES NOT draw air from the outside at all, which allows it to operate at any temperature. The single hose is an exhaust and it only exhausts the cold air that it removes from the inside air.

If you are blowing X number of CFM out of your RV that much air must be entering from somewhere also.