Portable A/C

Just read the link I posted that comes from the experts. You live in an area where it is now mid 60's. Right now we have a feels like temp of 107 and an actual of 94. To maintain 70 degrees inside I do not want to suck in 90+ degree outside temps and 80+% humidity.
As it says on the link, about the DOUBLE hose units:
Won't cool effectively if outside temperature is higher than indoors, or if there is high humidity (recommended to remove second hose in such conditions).

Now this is the comment I really like about a double hose unit:
Can cool room faster, especially if outdoor temperature is lower than indoor temperature.

If the OUTSIDE temp is cooler, I really don't need an AC unit do I?
We travel and live in high temps and high humidity, and we also travel in zero temps out West and up North. We do not have a fixed detached garage to cool and heat, just our RV which moves to the extremes.

rgatijnet1 wrote:

wwest wrote:

Sorry, you simply CANNOT exhaust living space airflow without it being replenished. Mother Nature, you know, HATES a vacuum.

If I were you, I would not get one.
Since I am me, and have several years of experience with my portable heat pump/AC unit, I think I will keep it. Nothing beats actual experience, which is why I got rid of my double hose unit and went with a single hose unit. :B

Maybe I see...

Is your experience based on the airflow temperature flowing from the unit.? A single hose unit, with "pre-conditioned", cooled, airflow for the condensing function will always have a lower, cooler, airflow outlet temperature vs a dual hose unit.

False judgment basis.....

rgatijnet1 wrote:

wwest wrote:

Sorry, you simply CANNOT exhaust living space airflow without it being replenished. Mother Nature, you know, HATES a vacuum.

If I were you, I would not get one.
Since I am me, and have several years of experience with my portable heat pump/AC unit, I think I will keep it. Nothing beats actual experience, which is why I got rid of my double hose unit and went with a single hose unit. :B

I HAVE both. Both are 11,000 BTU, and it became pretty obvious that the double hose unit kept our detached garage cooler, and dryer, than the single hose unit. So the single hose unit is now relegated to the attached garage.

But okay, in your experience where does your single hose unit get the "fill" airflow to replenish the air volume you "exhaust"...

wwest wrote:

Sorry, you simply CANNOT exhaust living space airflow without it being replenished. Mother Nature, you know, HATES a vacuum.

If I were you, I would not get one.
Since I am me, and have several years of experience with my portable heat pump/AC unit, I think I will keep it. Nothing beats actual experience, which is why I got rid of my double hose unit and went with a single hose unit. :B

rgatijnet1 wrote:

wwest wrote:

rgatijnet1 wrote:
I have a portable AC/heat pump that I use. These portable units come in single hose and double hose.

I chose the single hose unit because I use it primarily in the Winter and I did not want to suck in cold outside air.

So you continuously "exhaust" conditioned, A/C cooled airflow instead bringing in HOT outside air for the condenser cycle.
COOL...

Mine is a 120 volt, 11,000 BTU AC unit and a 9500 BTU heat pump and it works fine and draws a lot less power than the roof top units do. The vents hoses come with adapters to run out the window but you will probably have to also make a filler piece so that you do not get a leak if it is raining. My unit weighs about 65 pounds and is on wheels so you will have to find a location to store it while on the road. Noise wise the portable unit is no louder than my roof top units.
Obviously a more powerful AC unit will weigh more than mine and may need a dedicated power source.

Costco has a portable A/C heat pump for $389.00

Some of these require a condensate removal method.

With the heat pump, if I pulled in outside air, at zero degrees, NO heat pump, roof top or portable, would work, period. Since I am recirculating inside air at 70+ degrees, through my unit, the heat pump continues to heat the air and to operate just fine when other RV's have to use their LP furnace. Since I like to travel in the Winter, in cold temps, this was important.
Now when I use the AC for cooling, I again recirculate the inside air instead of sucking in HOTTER outside air. Exactly the same thing that you do when you put your dash AC on MAX cool.

Sorry, you simply CANNOT exhaust living space airflow without it being replenished. Mother Nature, you know, HATES a vacuum.

wwest wrote:

rgatijnet1 wrote:
I have a portable AC/heat pump that I use. These portable units come in single hose and double hose.

I chose the single hose unit because I use it primarily in the Winter and I did not want to suck in cold outside air.

So you continuously "exhaust" conditioned, A/C cooled airflow instead bringing in HOT outside air for the condenser cycle.
COOL...

Mine is a 120 volt, 11,000 BTU AC unit and a 9500 BTU heat pump and it works fine and draws a lot less power than the roof top units do. The vents hoses come with adapters to run out the window but you will probably have to also make a filler piece so that you do not get a leak if it is raining. My unit weighs about 65 pounds and is on wheels so you will have to find a location to store it while on the road. Noise wise the portable unit is no louder than my roof top units.
Obviously a more powerful AC unit will weigh more than mine and may need a dedicated power source.

Costco has a portable A/C heat pump for $389.00

Some of these require a condensate removal method.

With the heat pump, if I pulled in outside air, at zero degrees, NO heat pump, roof top or portable, would work, period. Since I am recirculating inside air at 70+ degrees, through my unit, the heat pump continues to heat the air and to operate just fine when other RV's have to use their LP furnace. Since I like to travel in the Winter, in cold temps, this was important.
Now when I use the AC for cooling, I again recirculate the inside air instead of sucking in HOTTER outside air. Exactly the same thing that you do when you put your dash AC on MAX cool.
The two hose systems use two different fans, one to suck in outside air, and the other fan to blow air over the coil to cool or heat it.
They use more electricity, and from my own experience in extremely HOT and COLD temperatures do not work as well as the single hose system. Here is a link to explain the differences: Portable AC units

Thanks to all of you, I'm not sure if my basement unit is beyond hope or not yet. It dose not cool at all. Having a repair guy look at it now.

rgatijnet1 wrote:
I have a portable AC/heat pump that I use. These portable units come in single hose and double hose.

I chose the single hose unit because I use it primarily in the Winter and I did not want to suck in cold outside air.

So you continuously "exhaust" conditioned, A/C cooled airflow, instead of bringing in outside (HOT?) airflow that's restricted to/for the condenser cooling path?

COOL...:S

Mine is a 120 volt, 11,000 BTU AC unit and a 9500 BTU heat pump and it works fine and draws a lot less power than the roof top units do. The vents hoses come with adapters to run out the window but you will probably have to also make a filler piece so that you do not get a leak if it is raining. My unit weighs about 65 pounds and is on wheels so you will have to find a location to store it while on the road. Noise wise the portable unit is no louder than my roof top units.
Obviously a more powerful AC unit will weigh more than mine and may need a dedicated power source.

Note that one way or another you have TWO HOSE system. Only exhausting interior air results in enough of a vacuum in your living space that outside air flows in via any/all RV leakage.

Costco has a portable A/C heat pump for $389.00

Some of these require a condensate removal method.

BUMPY wrote:
if air is exhausted from the single hose, it must also enter someplace. that place will be leaks around windows etc. if there is no additional air intake via the second hose. roof acs do bring in fresh air into their air exchange plenum and exhaust to the outside. the inside air circulates past the cold heat exchanger.
bumpy

Bet you $10 you are incorrect. Roof ACs do not pull outside air into the coach. They pull interior air across the cold evaporator and put it back into the interior. Outside, it pulls pulls air across the hot condensor to remove heat.

You ARE correct that a single hose portable ac will pull air into the coach somewhere.

2oldman wrote:
Where does the water go?

Like most efficient new AC units, most of the water is recirculated up to the coils to help cool them. The balance drains out a hose that has to run to the exterior. The hose diameter is about 3/4" and mine just discharges out through a small hole in the floor that I insert a plug in when not needed. In areas of the country with low humidity, there is no water to drain.