What Happens During an Air Conditioning Site Survey

Introduction

Before any air conditioning system is installed, there is one step that matters most.

The site survey.

This is where the entire project is decided.

Get this right and the system works as expected.
Get it wrong and problems show up later.

This guide shows you exactly what happens during a survey so you know what to expect.

What Is an Air Conditioning Site Survey

A site survey is a visit to your property before installation.

Its purpose is simple.

To assess your home and design the right system.

This is not a quick look around.

It is where key decisions are made.

Why the Site Survey Is Critical

Everything depends on this stage.

The survey determines:

• System size
• Unit placement
• Installation method
• Final cost

Without a proper survey, quotes are often inaccurate.

What Installers Check During a Survey

A good survey is detailed.

Installers will assess:

• Room dimensions
• Ceiling height
• Window size and direction
• Insulation levels
• How each room is used

These factors affect how much cooling is needed.

How Placement Is Decided

During the survey, installers plan:

• Where indoor units will go
• Where the outdoor unit will sit
• How airflow will move

They will avoid:

• Direct airflow onto beds
• Poor circulation
• Obstructions

This step links directly to system performance.

How Pipework Routes Are Planned

Pipework connects all parts of the system.

During the survey, installers will:

• Identify the shortest routes
• Check wall construction
• Plan internal or external runs

Neat routing reduces visual impact and cost.

What Electrical Checks Are Done

Electrical supply is often overlooked.

During the survey, installers check:

• Available capacity
• Consumer unit condition
• Need for a new circuit

This avoids delays during installation.

Real Example: Site Survey in Newbury

A homeowner wanted cooling in 3 rooms.

Survey completed in March 2025.

Findings:

• One room had high solar gain
• Limited space for the outdoor unit
• Electrical upgrade required

Outcome:

• System design adjusted for heat load
• Outdoor unit relocated to a better position
• Electrical work planned in advance

Result:

• Smooth installation with no delays

What Happens After the Survey

Once the survey is complete:

• A system is designed
• A detailed quote is provided
• Installation is scheduled

This is where you review everything before proceeding.

What a Good Survey Should Include

A proper survey should give you:

• Clear explanation of system design
• Unit locations shown
• Pipework routes explained
• Electrical requirements confirmed

If any of this is missing, ask questions.

Common Survey Mistakes

Not all surveys are thorough.

Watch out for:

• Quick visits with little detail
• No measurements taken
• Generic system recommendations
• No discussion of placement

These lead to poor installations.

How Long a Survey Takes

Most surveys take:

• 30 to 60 minutes for standard homes

Larger properties may take longer.

Time spent here saves time later.

Questions You Should Ask During the Survey

Use the survey to get clarity.

Ask:

• Why is this system recommended
• How was sizing calculated
• Where will pipework run
• What electrical work is needed

This helps you understand the proposal.

How This Links to Your Next Steps

The survey sets everything up.

Next, you should understand:

• What electrical work is required
• How installation is carried out
• What mistakes to avoid

These steps follow directly from the survey.

References

• CIBSE system design and load calculation guidance
• UK Government electrical safety standards
• F-Gas Regulation compliance requirements

Author Bio

Dr Julian Carter is a Technical and Compliance Director with extensive experience in building services engineering across the UK. He specialises in system design, installation standards, and compliance. He works with contractors and developers to ensure air conditioning systems are designed correctly and installed to a high standard.

‍