
How to Install a Heating and Air Conditioning Unit
A clear, step-by-step guide to HVAC installation in the UK. Covers system types, costs, compliance, and pro advice. Written by experts at RightAir Solutions.
RightAir Solutions is a company that specialises in commercial air conditioning services.
Installing a heating and air conditioning unit in the UK involves a structured approach to selecting the right system, ensuring compliance with local regulations, and carrying out the installation with precision and safety. This process includes choosing between ducted and ductless systems, assessing the property for system compatibility, preparing installation areas, and completing electrical and refrigerant connections, followed by comprehensive testing. It’s always best that a qualified HVAC installation professional does this kind of work to make sure it’s done safely and correctly.
Heating, ventilation, and air conditioning systems are what keep your indoor space comfortable through all seasons. In the UK, the weather can be all over the place, so having a reliable system makes a real difference. These systems can come in a range of setups, depending on the size of the property and how the space is used. At RightAir Solutions in London, we help people choose and install the best type of system for their homes or workplaces.
Heating and hot water account for over half of the average household’s energy bills in the UK. That’s why having an efficient and low carbon system is not just good for comfort, it makes financial sense too.
Pro Tip: Always replace filters on schedule. A clogged filter restricts airflow, increases running costs, and puts extra strain on your system.
HVAC stands for heating, ventilation, and air conditioning. These systems are designed to control temperature, airflow, and humidity to keep indoor environments comfortable and healthy. They work using parts like compressors, air handlers, thermostats, ducts, and sometimes gas furnaces or electric heating units.
Split systems include one unit indoors and one outdoors. These are common in homes and flats where you want separate heating and cooling.
These systems move warm or cool air through ducts that are hidden in walls or ceilings. They’re great for larger homes and offices. A properly installed ducted system ensures even air distribution and less visible equipment indoors.
Mini-split systems don’t need ducts and are good for flats, extensions, or any home without existing ductwork. They’re efficient and easy to fit. Electric heating options like wall mounted electric radiators or storage heaters also work well in small flats and rooms with limited space.
Hybrid systems switch between electricity and gas, depending on which is more efficient at the time. These work well in places where temperatures vary a lot during the year.
Air source and ground source heat pump systems are becoming more common in the UK. These offer an efficient alternative to gas boilers and can be paired with solar panels for even lower energy bills.
Choosing the right system starts with thinking about the size of your home, how well it’s insulated, how many people live there, and when you tend to use heating or cooling the most. For example, a three bed terrace in London will likely need a different system to a detached house in Surrey.
The bigger the home, the more power you’ll need to heat and cool it properly. Some systems can zone your space so you can control the temperature in different rooms.
Look for units with high SEER or Seasonal Energy Efficiency Ratio and HSPF or Heating Seasonal Performance Factor ratings. These ratings show how efficiently the unit uses electricity. Choosing an ENERGY STAR rated system means lower energy bills over time.
If you are replacing an old boiler, moving from a G-rated to an A-rated model with modern heating controls could save up to £420 annually according to the Energy Saving Trust.
If your home already has ductwork, a ducted system might make the most sense. If it doesn’t, or if you’re converting a loft or garden room, a ductless system is quicker and cheaper to install.
Pro Tip: Do not skip the load calculation. Oversized or undersized systems can lead to uneven temperatures and wasted energy.
Before anything is installed, it’s important to check a few things. This is where professionals will come and assess your space.
This calculation helps work out how much heating and cooling your property actually needs. It looks at things like how big the rooms are, what kind of windows you have, and how well the home is insulated.
A proper survey checks where the units can go, how noisy they might be, and whether there’s enough room around them to allow air to move freely. Outdoor units, in particular, need to be placed on a firm surface where they can get plenty of airflow.
If you’re in London or another built up area, planning permission might be needed, especially if you’re fitting an outdoor unit on a flat or listed building. The installer also needs to be F Gas certified to handle refrigerants, as required by UK law.
There is also growing government support for homes that move toward low carbon heating systems. Financial incentives and grants may be available to those installing heat pumps and solar powered systems.
Our certified engineers install efficient and regulation-compliant systems with zero guesswork.
HVAC installation uses both standard tools and a few specialist bits of kit. Safety is important too, so good quality protective gear is a must.
Power drill with masonry and wood bits
Vacuum pump
Copper pipe cutter
Manifold gauge set
Flaring tool kit
Digital refrigerant scale
Screwdrivers and insulated spanners
Wall mounting bracket kits
Pipe insulation sleeves
Allen keys and level
Safety goggles or face shield
Insulated gloves
Dust mask or respirator
Protective overalls
Steel toe cap boots
Thermal imaging camera for leak detection
Leak detector for refrigerants
Clamp meter for electrical checks
Laser level for unit alignment
Always check that tools are fully operational and appropriate for the system being installed. Use of the correct tools not only improves the quality of the installation but ensures safety and compliance with UK regulations.
Once your system is running, it needs to be looked after. Change filters every one to three months, keep outdoor units clear of leaves or rubbish, and book an annual service. This includes cleaning the coils, checking refrigerant levels, and testing controls. Well maintained systems last longer, run more quietly, and keep energy bills down. We always recommend that London residents sign up to a maintenance plan with a certified provider like RightAir Solutions.
Letting dust build up or skipping maintenance can reduce system efficiency by as much as 15 percent. Stay on top of it to keep your energy bills low and your home comfortable.
At RightAir Solutions, we bring years of experience installing HVAC systems across London. Our team is fully certified and understands the regulations that apply in each borough. We help you choose the right system, install it properly, and offer full aftercare including repairs and servicing. Whether you’re fitting a heat pump in a new build or upgrading an old boiler system, we’re here to get the job done right.
For more help or to arrange a home visit, contact RightAir Solutions through our website.
Do I need planning permission to install an air conditioning unit in the UK?
In most cases, planning permission is not required unless your property is listed or located in a conservation area. However, outdoor units must meet noise and placement regulations.
How long does it take to install a heating and air conditioning system?
Installation typically takes one to three days, depending on the type of system and the complexity of the property layout. Ducted systems usually require more time.
Can I install an HVAC system myself?
Installing a full HVAC system requires certified handling of refrigerants and electrical work. It’s best left to F Gas certified professionals to ensure safety and legal compliance.
What type of system is best for a London flat?
For flats, a ductless mini split system or electric heating solution is usually the best fit. These systems are compact, efficient, and easier to install without major structural changes.
How often should I service my HVAC system?
Annual servicing is recommended to maintain efficiency and avoid breakdowns. Filter changes should be done more frequently, typically every one to three months.
How to Install a Heating and Air Conditioning Unit
A clear, step-by-step guide to HVAC installation in the UK. Covers system types, costs, compliance, and pro advice. Written by experts at RightAir Solutions.
What is an Evaporator Coil for in an Air Conditioning Unit?
Understand what an evaporator coil does in your air conditioning unit. Learn about maintenance, repair options and costs in London with RightAir Solutions.
What Is the Minimum Temperature Permitted in an Office Environment?
Understand UK office temperature laws, risks of non-compliance, and expert HVAC solutions for a safe, productive workplace. Trusted advice from RightAir Solutions.
RightAir Solutions
At RightAir Solutions, we provide air conditioning services to domestic and business customers for heating and cooling units. We also supply and fit commercial AC and HVAC services with our insured, qualified and experienced London team of air con engineers.