Windowless Air Conditioner Solutions -Mini Split

Windowless Air Conditioner Solutions -Mini Split

How do you get air conditioning into a room that does not have any windows?

In a series of articles, we are presenting different options for air conditioning when you have a room that doesn’t have any windows.

We explore through the wall air conditioners, portable evaporative coolers, HVAC options, mini split, PTAC, and more.

  In this article we are talking about the mini split as a windowless air conditioning solution.

Mini Split Windowless Air conditioner

Mini split air conditioners are a windowless air conditioner solution that are a very close cousin to a traditional HVAC central heat and air unit.

The difference is that mini split air conditioners are more of an afterthought and usually go into a house after the house has already been built.

Where HVAC systems are built into the house and ductwork is installed as the house is being built.

That’s not always the case, but it is true most of the time.

Just like a HVAC system, the compressor of a mini split is outside of the house.

The compressor runs to an air handler( or multiple air handlers) inside of the house via conduit on the outside of the house. And on the outside of the walls inside of the house.

That is why we say that many split air conditioners are more of an afterthought because they are installed via the outside of the walls.

  Mini splits are a much more sophisticated way of getting air conditioning into a room with no windows then say a portable evaporative cooler.

But the price and the installation of a mini split is considerably more also.

Mini split air conditioner Benefits

There is a number of benefits to using a mini split air conditioner:

1.  Quiet

Since the compressor of a mini split air conditioner is outside of the house, the only noise coming from the air conditioning is the light sound of the air handler.

This is a good solution if noise is a problem. For instance, a recording studio for a podcast room needs silence as a prerequisite.

With the mini split air conditioner, you can achieve less noise.

2.  Individual temperature settings

Another big advantage of mini split air conditioners that even HVAC systems don’t have is the ability to set the desired temperature for every room individually.

Since each room has its own air handler with a mini split, the temperature of each room can be sent differently.

mini split in room Mini split downsides

1.  Installation

The installation of a mini split air conditioner requires quite a bit more than other types of portable air conditioning.

  Installing a mini split is more like installing two air conditioners because you have to install the outdoor compressor and the indoor air handler.

They also have to be connected via conduit.

  Other factors to consider are that electricity has to be run to the compressor which means a new circuit.

And a condensate line has to be installed to drain the moisture outside.

2.  Maintenance

Maintenance is also a huge part of owning a mini split air conditioner.

Two separate parts of the air conditioner required two separate maintenance.

The air handler has to have filter replacements and cleaned at least once a year.

The compressor outside requires disassembling to clean and also needs at least a yearly cleaning.

And the condensate lines need checking and unclogging if a problem appears.


A mini split air conditioner is a good solution for a room that does not have any windows.

A good solution but one that comes with a big price tag and requires installation and maintenance.

But they do have the benefit of being extremely quiet when noise is as much of a factor as getting cool air into a room without windows.

Published by

Dennis Reed

Dennis Reed Owner and Author @