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Old 07-27-2022, 04:36 PM   #9
8gv
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If you have window a/c units replace them with mini splits.

If you have the type of a/c units that roll on the floor and have a large diameter hose going out the window, replace them with regular window units or better yet, mini splits.

Why are the floor units bad you ask?

The hose that blows all the hot air out the window is the reason why.

Background:

For the purpose of this explanation, think of a "coil" as something much like your car's radiator.

An a/c system requires an evaporator coil and a condenser coil.

The evaporator coil, which is inside the house, has a fan that blows room air across it.

The evaporator coil extracts heat from the air and sends it, via refrigerant, to the condenser coil.

The condenser has a fan that blows air over it releasing the heat that came from the evaporator located inside the house.

In a mini split, traditional central air conditioning and even window units, the condenser is outside.

That means that outside air is used to extract the heat from the condenser.

So here is how the floor unit with the big hose works:

The evaporator and condenser are both in the unit.

Each has a fan.

The evaporator fan blows air from the room over the evaporator coil and gives you nice cool air out of the front of the unit.

The condenser fan blows ROOM AIR over the condenser coil extracting the heat and sending it out the window via the big hose.

If you were to put your hand over that hose outside you would feel a whole lot of air moving!

But where did that air come from?

It was drawn into your house through any gaps around the doors, windows, cellar or worst of all... your vey hot attic!

So really all the floor unit does is make the room it's in cooler at the expense of the rest of the house getting warmer.

As long as it's running, warm air is migrating across the house into the room that you intend to cool.

It needs to run a lot!
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