Commercial air conditioning in London covers everything from a single-room office needing one unit to a multi-floor building requiring a full VRV system. See our main commercial AC installation page, or jump to specific environments: offices, shop and retail, server rooms.

Commercial AC Systems for London Offices

System	Best for	Capacity range
Wall-mounted split	Small offices, meeting rooms, server rooms	2.5kW-7kW
Ceiling cassette	Open-plan offices, retail, restaurants	2.5kW-14kW
Ducted split	Boardrooms, high-spec offices	5kW-15kW
VRV / VRF system	Multi-floor offices, large commercial buildings	8kW-100kW+

We use Daikin, Mitsubishi Electric, and Fujitsu commercial ranges as standard. All installations comply with F-Gas regulations.

Specialist Commercial Environments

We have experience in shop and retail, server and IT rooms, professional offices, and general commercial premises across London.

Maintenance Contracts for London Businesses

Commercial AC systems require at least biannual servicing. Service contracts include scheduled maintenance, priority breakdown response, and preferential repair rates.

Frequently Asked Questions

How much does commercial AC cost in London?
A small office with two to three ceiling cassettes typically costs £4,000-£8,000 installed. See our cost guide.

Do you install in occupied office buildings?
Yes. We work across Central, North, West, and South West London, phasing work and using out-of-hours installation where required.

Can you service a commercial system you did not install?
Yes. See our servicing page.

Get a Commercial AC Quote

Free survey and design for commercial AC in London: 020 7870 2333. Or visit our installation page.

Simply Air Conditioning London — F-Gas certified commercial installation and servicing since 2009.

We install and service air conditioning across all of London — including Central London, where conservation areas, period buildings, and dense urban settings demand an experienced installer. Our main air conditioning installation page covers the full range of residential and commercial services.

Areas We Cover in Central London

Area	Common property types	Common AC requirement
Kensington and Chelsea	Stucco terraces, listed townhouses, mansion flats	Concealed ducted, conservation-compliant installs
Westminster	Period conversions, offices	Wall-mounted splits, commercial systems
Islington	Victorian terraces, converted warehouses	Multi-splits, single units
Southwark and Bermondsey	New-builds, warehouse conversions, offices	Ceiling cassettes, commercial VRV
Canary Wharf	High-rise residential, offices	Commercial systems, high-rise installs
Hackney and Shoreditch	Victorian terraces, studios	Residential splits, small commercial
Camden	Period houses, flat conversions, retail	Residential and light commercial

We also cover North London, West London, and South West London.

Central London Considerations

A large proportion of Central London falls within conservation areas. We assess planning status at survey stage and design accordingly — we have never had an installation refused on planning grounds. For period properties, see our guide to AC in Victorian properties. For flats and mansion blocks, see our London flats AC guide. All engineers carry F-Gas certification.

Frequently Asked Questions

Do you cover all Central London postcodes?
Yes — W1, WC1, WC2, EC1-EC4, SW1, SW3, SW7, SE1, N1, NW1, E1 and all surrounding postcodes.

What does a Central London installation cost?
Costs are the same as elsewhere in London. See our full cost guide.

Book a Survey in Central London

Call 020 7870 2333 for a free survey. Or visit our installation page.

Simply Air Conditioning London — F-Gas certified installation across all London zones since 2009.

Daikin is the world’s largest air conditioning manufacturer and, in our experience, produces the most reliable and efficient systems available in the UK market. We install, service, and repair Daikin systems across London as an authorised installer. For full installation services, visit our AC installation page.

Daikin Systems We Install in London

Range	Best for	Key feature
Daikin Perfera	Bedrooms, quiet environments	19dB(A) minimum noise
Daikin Emura	Living spaces, design-conscious interiors	Award-winning aesthetics
Daikin Stylish	Modern homes, compact rooms	Sleek flat-front design
Daikin Comfora	Residential, value-focused	Reliable, efficient
Daikin VRV	Commercial, multi-zone offices	Large-scale systems
Daikin Altherma	Heat pump heating	Air-to-water, replaces boiler

For residential installations, see our domestic installation page. For offices and commercial premises, see commercial installation or office AC installation.

Daikin Warranty and Servicing

When installed by an authorised installer and serviced annually, the Daikin warranty extends to five years on parts and compressor. All engineers are F-Gas certified. Annual servicing is required to maintain the extended warranty. We cover Central, North, West, and South West London.

Frequently Asked Questions

Is Daikin worth the extra cost over budget brands?
Yes — total cost over 10 years usually favours Daikin. See our cost guide.

Do you install Daikin VRV commercial systems?
Yes. We install and service Daikin VRV for offices, retail, and commercial properties across London.

Get a Daikin Quote

Free survey and quote for Daikin installation: 020 7870 2333. Or visit our AC installation page.

Simply Air Conditioning London — Daikin authorised installer. F-Gas certified since 2009.

Bedroom air conditioning is the fastest-growing segment of residential AC in London. A correctly installed system makes sleeping through a London summer straightforward — without the noise or inefficiency of a portable unit. For the full range of domestic installation options, or to understand costs, see our AC cost guide.

What to Look for in a Bedroom AC Unit

Noise Level

Look for units rated below 22dB(A) in sleep mode. Daikin Perfera and Mitsubishi Electric MSZ-LN both operate at around 19-21dB(A) at minimum speed — genuinely quiet in a sleeping room.

Correct Sizing

A typical London bedroom of 15-20m² needs a 2.5kW system. Correct sizing at survey stage is critical — an undersized unit runs continuously and never achieves the set temperature.

Whole-House Residential Installations

For whole-house cooling, a multi-split system serves multiple rooms from one outdoor unit. See our domestic installation page. For flats, see our London flats AC guide. For period properties, see our Victorian properties guide.

Rooms to cool	System	Approx. installed cost
1 room	Single wall-mounted split	£1,200-£2,200
2 rooms	Multi-split	£2,800-£4,500
3-4 rooms	Multi-split	£4,500-£7,500

Frequently Asked Questions

What brands do you recommend for bedrooms?
Daikin Perfera and Emura for quiet operation. Mitsubishi Electric MSZ-LN for ultra-low noise. Both carry strong warranties when installed by an F-Gas certified engineer.

Can I install AC in a rented home?
Only with landlord consent. For tenants, see our London flats guide.

Book a Survey

Free surveys for bedroom and whole-house residential installations: 020 7870 2333. We cover Central, North, West, and South West London.

Simply Air Conditioning London — F-Gas certified residential installation since 2009.

Portable air conditioners are widely sold in London every summer — easy to set up, no installation needed. But for most homeowners, a fixed wall-mounted split installation delivers better cooling, lower running costs, and less noise. This guide helps you decide which is right for you.

Portable vs Fixed Split: A Comparison

Factor	Portable unit	Fixed split system
Installation	None required	Half-day professional installation
Cost	£300-£800 to buy	£1,200-£2,200 installed — see cost guide
Cooling efficiency	Lower — loses cold air around exhaust hose	Higher — sealed refrigerant loop
Noise	Higher — compressor inside the room	Lower — compressor outdoors
Best for	Temporary use, rented flats	Permanent cooling, owned property

For London flats specifically, see our complete guide to AC in London flats. For period properties, our Victorian properties guide covers installation constraints.

When a Fixed Installation Is the Better Choice

If you own your property and plan to stay more than one summer, a fixed domestic installation recovers its cost within two to three years. We cover all London zones — Central, North, West, and South West London.

Frequently Asked Questions

Can a portable AC cool a whole flat?
Not effectively — suited to single rooms up to 25m². See our London flats AC guide for whole-flat solutions.

Are portable AC units allowed in rented flats?
Yes — no permanent installation required. For permanent cooling, freeholder consent is typically needed for a fixed system.

Ready for a Permanent Solution?

Call us for a free survey: 020 7870 2333. A wall-mounted split can typically be installed within a week. Visit our installation page for full details.

Simply Air Conditioning London — F-Gas certified installation and servicing since 2009.

If your air conditioning is blowing warm air, running longer than normal, or icing up, low refrigerant is one of the most common causes. A regas restores the system to its designed operating pressure. If the system is beyond repair, our installation team can advise on a modern replacement.

What Is an AC Regas?

Refrigerant does not get used up in normal operation — if a system is low, it has a leak that must be found and repaired before the gas is topped up. This is a legal requirement under F-Gas regulations and the only approach that makes the repair last.

Signs Your AC Needs Regassing

• Not cooling as well as it used to
• Running continuously without reaching the set temperature
• Ice forming on the indoor unit or refrigerant lines
• Hissing or bubbling sounds near the unit

The Regas Process

We locate the leak using electronic detectors and UV dye. All engineers carry F-Gas certification. We work with all refrigerant types across Daikin, Mitsubishi Electric, Fujitsu, and all other major brands.

Refrigerant	Common in	Notes
R32	Systems from 2015 onwards	Lower GWP, now standard in new systems
R410A	Systems 2005-2020	Being phased out under F-Gas regulations
R22	Pre-2004 systems	Banned for topping up — replacement required

Frequently Asked Questions

How much does an AC regas cost in London?
A regas including leak detection, repair, and top-up typically costs £200-£350. See our full cost guide for context.

Can you top up without fixing the leak?
No — illegal under F-Gas regulations and won’t last.

My AC has R22 — what are my options?
R22 cannot legally be topped up. A new installation is required. Our cost guide covers current replacement prices.

Is my system worth repairing or replacing?
Systems over 12-15 years old are often better replaced. We provide honest advice and free quotes for domestic or commercial replacement installations.

Book a Regas

Call 020 7870 2333 for same-day bookings across Central, North, West, and South West London.

Simply Air Conditioning London — F-Gas certified since 2003.

Air conditioning systems need regular maintenance to run efficiently, last longer, and keep manufacturer warranties valid. For London properties, an annual service is the minimum — commercial systems used year-round benefit from biannual servicing.

Maintenance is the complement to a good air conditioning installation — the two together determine the long-term value of your system.

What an Annual AC Service Includes

Check	Why it matters
Filter clean	Dirty filters reduce airflow, cut efficiency, and can cause icing
Evaporator and condenser coil inspection	Fouled coils reduce heat exchange efficiency significantly
Refrigerant pressure check	Low refrigerant indicates a leak and reduces cooling performance
Condensate drain flush	Blocked drains cause water leaks inside the property
Electrical connections check	Loose connections cause failures and are a fire risk
Full operational test	System tested in cooling and heating modes

How Often Should AC Be Serviced?

Residential systems used seasonally: once per year, ideally in spring. Office and commercial systems in continuous use: every six months. Server rooms may require more frequent checks given the critical nature of the environment.

Maintenance and Manufacturer Warranty

Most AC manufacturers — including Daikin, Mitsubishi Electric, and Fujitsu — require evidence of annual servicing to honour warranty claims. A skipped service can void your warranty.

What If a Fault Is Found?

If our engineer identifies a fault during a service visit, they will advise on repair options and costs. For systems beyond economic repair, we provide quotes for a replacement installation.

Frequently Asked Questions

How much does an AC service cost in London?
A full annual service for a single-unit residential system costs £150–£200. See our cost guide for full pricing context.

Can I service my own AC?
Filter cleaning can be done by the owner. Gas checks and electrical work require an F-Gas certified engineer.

What happens if refrigerant is low?
Low refrigerant indicates a leak. We locate and repair the leak, then recharge the system — see our repair service for details.

Book Your Annual Service

Book a service or enquire about a maintenance contract: 020 7870 2333. We cover all London zones including Central, North, West, and South West London.

Simply Air Conditioning London — F-Gas certified installation, servicing and repair since 2009.

Air conditioning breakdowns rarely happen at a convenient moment. When your system stops working in a London heatwave, you need an engineer quickly. We can offer same-day callout for urgent repairs.

If a repair is not cost-effective, we can advise on a new installation — often the better investment for systems over 12–15 years old.

Common AC Faults We Fix

Fault	Likely cause	Fix
Not cooling (or cooling poorly)	Low refrigerant, dirty filters, faulty compressor	Gas top-up, service, or component replacement
Water leaking indoors	Blocked condensate drain, dirty evaporator coil	Drain clear, coil clean
Won’t turn on	Electrical fault, tripped isolator, PCB fault	Electrical diagnosis and repair
Unusual noise	Fan bearing failure, loose panel, refrigerant issue	Component replacement
Ice forming on unit	Low refrigerant, restricted airflow	Gas check, filter clean
Error codes on display	Varies by code and brand	Diagnostic visit, targeted repair

Our Repair Process

Diagnosis

Our engineers carry diagnostic equipment for all major brands — Daikin, Mitsubishi Electric, Fujitsu, Samsung, LG, Panasonic, and others. All our engineers are F-Gas certified.

Transparent Pricing

You receive a clear quote for the repair before any work proceeds. No surprises on the invoice.

When Replacement Makes More Sense

If a system is more than 12–15 years old and requires a major component replacement, a new domestic installation or commercial installation is often more cost-effective. We will advise honestly. See our cost guide to understand what a new installation involves.

Preventing Future Breakdowns

Most AC faults are preventable with regular annual servicing. A service catches low refrigerant, blocked drains, and dirty coils before they cause a breakdown.

Frequently Asked Questions

How much does an AC repair cost in London?
Minor repairs typically cost £80–£150. Gas recharges cost £150–£300. Major component replacements vary — we quote before proceeding.

Is it worth repairing an old AC unit?
If a system is over 12–15 years old and requires a major repair, a new installation is often the better long-term investment.

Can you repair AC in a listed building?
Yes. Repairs do not require planning permission. For installation in period properties, see our Victorian properties guide.

Book a Repair

Call 020 7870 2333 for same-day or next-day repair bookings.

Simply Air Conditioning London — F-Gas certified repair and installation since 2003.

Air conditioning costs in London vary significantly depending on the system type, property size, and number of rooms. This guide gives you real figures — not ranges so wide they are meaningless. For a full list of our installation services, visit our AC installation page.

Air Conditioning Installation Costs in London (2026)

System type	Typical installed cost	Notes
Single wall-mounted split	£1,200 – £2,200	One room, one outdoor unit
Multi-split (2 rooms)	£2,800 – £4,500	Two indoor units, one outdoor unit
Multi-split (3–4 rooms)	£4,500 – £7,500	Full flat or small house
Ceiling cassette (office)	£1,800 – £3,500	Per zone, per unit
Concealed ducted system	£6,000 – £15,000+	Whole-house, high-spec

For domestic installations, wall-mounted splits are the most common and cost-effective choice. For commercial installations, ceiling cassettes and VRV systems suit larger spaces.

What Affects the Price?

System Capacity (kW)

Larger rooms need more powerful systems. Correct sizing at survey stage is the single most important factor in getting value from an air conditioning installation.

Pipework Runs

Short, clean pipework runs cost less. Period properties require more careful routing — see our guide to AC in Victorian properties for details.

Brand

We install and recommend Daikin as the default — the combination of reliability, efficiency, and warranty support is unmatched. Mitsubishi Electric and Fujitsu are strong alternatives.

Annual Running Costs

A correctly sized inverter split unit running 8 hours per day for four summer months typically costs £80–£180 per year in electricity. All our installed systems qualify for the extended manufacturer warranty when serviced annually — see our maintenance and servicing page.

Annual Service Cost

A full annual AC service costs £150–£250 depending on system size. This covers filter cleaning, refrigerant pressure check, coil inspection, and drainage test.

Frequently Asked Questions

Is air conditioning expensive to run in London?
Not with a modern inverter system. Running costs are typically £100–£200 per year for a single-room split used through summer.

Are cheaper quotes safe to accept?
Be cautious of quotes significantly below market rates. F-Gas certification is a legal requirement — unqualified installations are illegal and void insurance.

What about flats?
See our guide to AC for London flats for specific cost considerations around freeholder consent and shared buildings.

Get a Fixed-Price Quote

We provide fixed-price, all-inclusive quotations after a free site survey. Call 020 7870 2333 or book via our installation page.

Simply Air Conditioning London — F-Gas certified installation, servicing and repair since 2009.

Air conditioning installation in London is more straightforward than most people expect. The challenge is usually not the installation itself but choosing the right system, finding a qualified installer, and understanding what the process involves.

This guide covers everything you need to know before booking — from system types and installation timelines to costs and what distinguishes a professional installation from a poor one.

Which AC System Is Right for Your London Property?

The most common system installed in London homes and offices is a wall-mounted split unit. For a full overview of system options and services, visit our air conditioning installation page. One indoor unit on the wall, one outdoor condenser — typically on a rear wall, flat roof, or side return.

System	Best for	Typical install time
Wall-mounted split	Single rooms, bedrooms, living rooms	Half day to 1 day
Multi-split	Multiple rooms from one outdoor unit	1 to 2 days
Ceiling cassette	Open-plan spaces, offices	1 day
Concealed ducted	Whole-house, high-spec residential	2 to 4 days
Floor-standing console	Rooms where wall-mounting is not possible	Half day to 1 day

For homes, see our domestic air conditioning installation service. For business premises, see commercial AC installation.

The Installation Process Step by Step

Free Site Survey

Every installation starts with a free survey. We visit your property, assess room size, wall construction, ceiling height, and the most practical position for both indoor and outdoor units. Pipework routes are agreed before any work begins.

Quotation

You receive a fixed-price quotation covering all labour, materials, refrigerant, and commissioning. For a breakdown of costs, see our AC installation cost guide for London.

Installation Day

The indoor unit is wall-mounted and connected to the outdoor condenser via a refrigerant line set. Pipework is clad in external trunking or concealed internally where possible.

Commissioning

The system is pressure-tested, charged with refrigerant, and run through full operational tests. All our engineers are F-Gas certified, as required by law.

How Long Does Installation Take?

A single-room wall-mounted split takes four to six hours. Multi-room systems take one to three days. We cover all of London — including Central London, North London, West London, and South West London.

What Makes a Good Installation?

The quality of an AC installation is mostly invisible. Good pipework routing, correct sizing, secure brackets, and a properly commissioned system determine long-term reliability. After installation, annual maintenance keeps the system running at peak efficiency.

Frequently Asked Questions

Do I need planning permission to install air conditioning in London?
In most cases, no. For period properties, see our guide to AC in Victorian and period properties.

Can air conditioning be installed in a flat?
Yes — see our complete guide to AC in London flats for details on freeholder consent and condenser placement.

Does AC require annual servicing?
Yes. An annual air conditioning service keeps the system efficient and maintains the manufacturer warranty.

Can you install in winter?
Yes. Installation is possible year-round.

Book a Free Survey

The first step is a free, no-obligation site survey. Call us on 020 7870 2333 or visit our installation page to book.

Simply Air Conditioning London — F-Gas certified installation, servicing and repair since 2003: 020 7870 2333.