How do you install one ina 3x4 horizontal sliding window?

You either have to buy an AC unit designed for horizontal sliders, or make a blank to go on top of the standard window AC unit and use a brace to hold the unit.

You may also consider a stand alone unit with a hose. The hose adaptor is easily turned vertical to accommodate a horizontal slider. However, I would only consider a dual-hose unit. Single hose units like found at the Home Depot are wildly inefficient.

Those U shaped window units sure get good reviews - quiet and efficient. Only thing is is the are for vertical sliders. Would it be a big deal to swap windows to get the better a/c?

I'm trying to come up with a joke about the ac unit losing it's spouse but I'm coming up blank.

We had a portable AC with a vent tube installed like that easily. Of course that was in a cabin not a full-time home.

Not sure how you would make that work with a window unit.

Got it. Interesting to see how the 8000 btu does vs the 5000 btu

We could not upgrade to a whole house system liked I was planning. so this was done in lieu. Just trying to survive the summer, is all.

supposed to be in the 90's soon
So we'll see.

This unit with some fans to move some cool air around is all we got

Fingers crossed.

Use a floor stand alone unit with the hose vent, then drill a hole in the wall and install a dryer vent, connect the hose to that vent and bobs your uncle...

As I stated earlier, you need a two hose unit. Let’s say it’s 100 outside. The single hose unit is pumping out 140° air, but every cubic ft of air has to be replaced with 100° air from the outside. You only gain cooling from the difference. The two hose units are true separate systems, just like a regular window unit.

I have a floor standing unit. Works well BUT, the outflow tube gets warm. I have wrapped this type with insulation to help.

I just purchased this one for one of my apartments. I'll report back after I get it.

https://www.amazon.com/Whynter...en%2C130&sr=1-4&th=1

Is it practical to remove the window entirely and reframe the opening to fit the u shaped “window unit” air conditioner properly?

My experience is that you’ll have to run a condensate drain line from an in-room unit like you’re considering. Absent the drain line, you’ll have to empty a condensate reservoir periodically, so it doesn’t overflow. A pain in the ass.

The portable AC unit showed up. I did a quick and dirty install in my son's room which is on the third story, so it is a little warm. I purchased this for one of my apartments, so I'm not leaving it here. Just installed it to test and evaluate. I'll leave it here for a few weeks.

Here is the unit. The air coming out of it would freeze an Eskimo.



Here are the two hoses. The larger, top hose is the hot air exit. The smaller one is for incoming outside air. This prevents the negative pressure effect of the single hose style portables.


This is a 12,000BTU unit. According to my energy meter, it is using just shy of 1000 watts. I will remove this and install a mini-split in a little bit. This will allow me to see how a separate AC unit upstairs affects my central AC. I also like the idea that a mini-split can heat in the winter. Also, there are mini-splits that aren't much more than this portable.

All-in-all, if you can, I'd go the mini-split route. The biggest advantage of the unit pictured is that it is portable, it is easily installed in a horizontal window, and it only takes 30 min to set up. I like having a few portables because I have rentals, so I use them as temporary cooling when the AC goes out in an apartment. They have gotten a lot better and a lot cheaper over the years, but so have the mini-splits. They really aren't a bad deal if it is your only choice for a difficult room.