Where Should You Install Air Conditioning Units in Your Home

Introduction

You’ve chosen your system.

Now comes a key decision.
Where should the units go?

This is not just about appearance.

Placement affects:

• Cooling performance
• Noise levels
• Airflow
• Long term reliability

Get this wrong and even the best system will struggle.

Why Placement Matters More Than You Think

Air conditioning works by moving air across a space.

If units are placed badly:

• Air does not circulate properly
• Hot spots remain
• The system works harder than it should

Good placement creates even cooling across the room.

Where Should Indoor Units Be Installed

Indoor units are usually wall mounted.

The best position is:

• High on a wall
• Central to the room
• Clear of obstructions

This allows air to spread evenly.

What to Avoid When Placing Indoor Units

Avoid these common mistakes:

• Installing directly above beds
• Placing units behind doors
• Blocking airflow with furniture
• Positioning units too low

These reduce performance and comfort.

Should You Install Air Conditioning Above the Bed

This is one of the most common questions.

It may seem convenient.

But it often causes:

• Direct airflow onto you
• Discomfort during sleep

A better option is:

• Positioning the unit to one side
• Allowing airflow to circulate naturally

Where Should Outdoor Units Be Installed

Outdoor units need careful planning.

Common locations include:

• Ground level next to the property
• Wall mounted on brackets
• Rear or side of the house

The goal is to balance performance and visibility.

What to Consider for Outdoor Unit Placement

Key factors include:

• Airflow around the unit
• Noise impact
• Distance from indoor units
• Access for maintenance

Poor placement can reduce efficiency.

Real Example: Installation in Farnham

A homeowner wanted cooling in a bedroom and living space.

Project completed in June 2025.

Challenges:

• Limited wall space
• Need to avoid visible pipework at the front of the house

Solution:

• Indoor units positioned high and central
• Outdoor unit placed at the rear on ground level

Result:

• Clean appearance
• Balanced cooling throughout

How Pipework Affects Placement

Pipe routes connect indoor and outdoor units.

Shorter routes are better.

Long or complex routes:

• Increase installation cost
• Reduce efficiency slightly

Good planning keeps pipework discreet.

Can You Hide Air Conditioning Units

Yes, but it needs planning.

Options include:

• Boxing in pipework
• Using trunking that matches walls
• Positioning units out of direct sight

Hiding the system should not block airflow.

Placement in Different Room Types

Each room has different needs.

Bedrooms:

• Avoid direct airflow
• Focus on quiet operation

Living rooms:

• Central placement works best
• Ensure full room coverage

Offices:

• Avoid blowing air directly onto desks

Common Placement Mistakes

These are often seen in poor installations:

• Units placed for convenience, not performance
• Outdoor units installed in restricted spaces
• Ignoring airflow direction
• Long visible pipe runs

These affect both performance and appearance.

Questions You Should Ask Your Installer

Before installation, ask:

• Why is this the best position
• How will airflow move across the room
• Where will pipework run
• Can anything be improved visually

This ensures the design is thought through.

How This Links to Your Next Steps

Now you understand placement.

Next, you should consider:

• Planning permission
• Regulations
• Any restrictions on installation

These can affect what you are allowed to do.

References

• CIBSE guidance on airflow and system design
• UK Government planning guidance for home improvements
• Energy Saving Trust advice on home systems and energy use

Author Bio

Dr Julian Carter is a Technical and Compliance Director with extensive experience in building services engineering across the UK. He focuses on air conditioning design, system layout, and installation standards. He works with contractors and developers to ensure systems are installed correctly and perform as expected.

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