SPLIT & MULTI-SPLIT SYSTEMS

Cool One Room or Your Whole Home

The UK's most popular choice for home cooling. Quiet, efficient, and installed in as little as one day — with 0% VAT on all systems.

5.0
5-star rated · F-Gas certified installers

Cool Home.Zero Hassle.

Getting air conditioning installed shouldn't be complicated. In three simple steps, you'll go from warm rooms to cool comfort.

Step 1 - Share Your Space

Answer a few quick questions about your home and the room you want cooled. It takes under two minutes.

Step 2 - Get Your Quote

We'll recommend the right system for your space and give you a fixed price upfront. No hidden extras or surprise costs. Everything is agreed before we start.

Step 3 - We Fit It Fast

Our certified engineers install your system in as little as a day, at a time and date that suits you and your schedule.

Choose Your System

SPLIT SYSTEM

Single Room  Comfort

One outdoor unit paired with one indoor unit. The simplest way to cool or heat a single space. Ideal for bedrooms, home offices, and living rooms.

Cools one room fast

Quick, easy install

Lowest upfront cost

Ideal for home offices

Easy retrofit

MULTI-SPLIT SYSTEM

Whole Home  Cooling

One outdoor unit connects to up to five indoor, giving you independent climate control across multiple rooms without cluttering your exterior walls.

Set each room's temperature

Saves space outside

One system, whole home

Covers up to five rooms

Perfect for renovations

MULTI-SPLIT SYSTEM

Whole Home  Cooling

One outdoor unit connects to up to five indoor, giving you independent climate control across multiple rooms without cluttering your exterior walls.

Set each room's temperature

Saves space outside

One system, whole home

Covers up to five rooms

Perfect for renovations

WHY HOMEOWNERS LOVE IT

More Than Just Cooling

Every Daikin system we install heats, cools, and purifies your air, all from a single unit.
😴

Sleep Like You Mean It

Whether it's a heatwave or a cold winter, your bedroom is always the right temperature for a great night's sleep.
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Quieter Than a Whisper

At just 19 dB, the Daikin Perfera is quieter than a library and you'll forget it's running.
iPhone mockup
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Cheaper Than Gas Heating

Heat pumps produce around £5 of heat for every £1 of electricity, making them a smarter way to keep your home warm.
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Cleaner Air, Fewer Allergies

Removable filters trap dust, pollen, and bacteria with every cycle, helping to keep your indoor air fresher.
SEE OUR WORK

Every Install,Done Right.

CUSTOMER TESTIMONIALS

Don't Just Take Our Word for It

"We decided to have air conditioning fitted in our master bedroom and living room. Jacob was fantastic from the initial quote, and lead engineer Nick did a brilliant job with the installation. They cleaned up so well you wouldn't even know they had been here. Highly recommend Cosyflow to anyone looking for a seamless experience."
Piotr Kowalski
Ealing | Multi-split | 2 Indoor Units
"We highly recommend Jacob and the team at Cosyflow. They carried out the domestic installation to the highest standard with absolutely no mess. They were completely upfront with the costs and kept us updated throughout the whole process. Great company, great price, and a quality result."
Yusuf  Rahman
Hampstead | Multi-split | 4 Indoor Units
"Great experience with Cosyflow from start to finish! Jacob responded promptly to my inquiry, and teams attitude and service during the installation were excellent. They are highly experienced and it really shows in his work. The new unit cools the room rapidly and is incredibly quiet. Would highly recommend!"
Leo Jones
Queens Park | Split | 1 Indoor Units
"Amazing advice and service from Jacob right from the start. Nick fitted our new system and his workmanship was top-notch. He was more than happy to take the time to explain the system controls to us before leaving. Quick, tidy, and quality installation.
Oliver Whitmore
Notting Hill | Multi-split | 3 Indoor Units
"I couldn't be happier with the service from Cosyflow. Jacob provided a very competitive quote with absolutely no pushy sales tactics, just honest advice. Nick installed a wall system in my home office and bedrooms. The outside pipework was perfectly concealed in neat black gloss trunking. Very professional, polite, and no cables and pipes in sight."
Charlotte Fairbanks
Wimbledon | Multi-split | 5 Indoor Units
"Outstanding service. From initial contact to the completion of the job, we were completely satisfied. Their highly experienced engineer worked incredibly neatly and efficiently to install 5 units inside our house. The new system has improved the cooling in our home immensely. Cosyflow will definitely be our number one choice for any future work!"
Kev Ashcroft
Hampstead | Multi-split | 5 Indoor Units
"I couldn't be happier with the service from Cosyflow. Jacob provided a very competitive quote with absolutely no pushy sales tactics, just honest advice. Nick installed a wall system in my home office and bedrooms. The outside pipework was perfectly concealed in neat black gloss trunking. Very professional, polite, and no cables and pipes in sight."
Charlotte Fairbanks
Wimbledon | Multi-split | 5 Indoor Units
"Amazing advice and service from Jacob right from the start. Nick fitted our new system and his workmanship was top-notch. He was more than happy to take the time to explain the system controls to us before leaving. Quick, tidy, and quality installation.
Oliver Whitmore
Notting Hill | Multi-split | 3 Indoor Units
"We decided to have air conditioning fitted in our master bedroom and living room. Jacob was fantastic from the initial quote, and lead engineer Nick did a brilliant job with the installation. They cleaned up so well you wouldn't even know they had been here. Highly recommend Cosyflow to anyone looking for a seamless experience."
Piotr Kowalski
Ealing | Multi-split | 2 Indoor Units
"Outstanding service. From initial contact to the completion of the job, we were completely satisfied. Their highly experienced engineer worked incredibly neatly and efficiently to install 5 units inside our house. The new system has improved the cooling in our home immensely. Cosyflow will definitely be our number one choice for any future work!"
Kev Ashcroft
Hampstead | Multi-split | 5 Indoor Units
"Great experience with Cosyflow from start to finish! Jacob responded promptly to my inquiry, and teams attitude and service during the installation were excellent. They are highly experienced and it really shows in his work. The new unit cools the room rapidly and is incredibly quiet. Would highly recommend!"
Leo Jones
Queens Park | Split | 1 Indoor Units
"We highly recommend Jacob and the team at Cosyflow. They carried out the domestic installation to the highest standard with absolutely no mess. They were completely upfront with the costs and kept us updated throughout the whole process. Great company, great price, and a quality result."
Yusuf  Rahman
Hampstead | Multi-split | 4 Indoor Units

Frequently Asked Questions

The most common questions we get about split and multi-split systems. Don't see yours? Get in touch and we'll answer it.
How long does a split install take?

A standard single-room split is fitted in one day. Multi-splits with three or more indoor units typically take two to four days.

Do I need planning permission?

In most cases, no. AC outdoor units fall under permitted development in England, provided the unit is placed at least 1m from the boundary and isn't visible from the road on a listed building. We'll confirm during the survey and handle any application on your behalf if needed.

Does it heat as well as cool?

Yes. Every system we fit is a heat pump, so you get efficient cooling in summer and cheap heating in shoulder seasons, typically producing around £5 of heat for every £1 of electricity.

 How loud is the outdoor unit?

A modern Daikin condenser runs at 45 to 50 dB on full tilt, quieter than normal conversation and around the level of a fridge humming. On quiet-mode at night it drops below 40 dB.

What does it cost to run?

Not much. Based on today's electricity price (around 25p per kWh), a bedroom unit costs roughly 7p an hour to cool and 11p an hour to heat. A lounge-sized unit is around 15p and 23p an hour. Cooling a whole 3-bed home on a hot day works out to about £1 to £2.50, and running the system for heating across a full winter typically costs £300 to £500, depending on how much you use it.
Because these systems are heat pumps, they give you about £5 of heat for every £1 of electricity, making them cheaper to run than an old gas boiler in mild weather. Electricity prices change every few months under the Ofgem cap, so your actual costs will go up or down slightly in line with that, but the 5-to-1 efficiency stays the same. We'll give you exact figures for your home during the survey.

Is it eligible for 0% VAT?

Yes, because the heat pump component of an air conditioning system qualifies as energy-saving domestic equipment under current UK rules. Every install we quote carries 0% VAT until March 2027.

What warranty do I get?

All our installs come with a manufacturer's warranty (typically 5 to 7 years on Daikin) and a 12-month workmanship guarantee on the installation itself.

How often does it need servicing?

Once a year is plenty for a domestic system. An annual service keeps the warranty valid, maintains efficiency, and catches small issues before they become expensive ones. We offer a fixed-price service plan if you'd like us to remember for you.

Will it work in winter?

Yes. Modern heat pumps produce useful heat down to around -15°C outside, so they handle a UK winter comfortably. Output does drop in very cold snaps, which is why we size systems with that in mind during the survey.

Where can the outdoor unit go?

Typically on an exterior wall, flat roof, or ground-mounted on anti-vibration legs. It needs airflow around it and a sensible route for pipework back to the indoor unit. We'll walk the options with you on the survey and flag anything that affects aesthetics or performance.

Is it suitable for a flat or leasehold property?

Usually yes, but you'll need freeholder consent before we start. We can provide spec sheets, and noise data.

What's the difference between a single split and a multi-split?

A single split pairs one outdoor unit with one indoor unit, ideal for a single room. A multi-split runs two to five indoor units off one outdoor condenser, which saves wall space and is more cost-effective for whole-home cooling.

Get a Quote