Advice
Air conditioning advice and guides
Brand reviews, error codes, prices, grants, planning and practical guides from F-Gas certified engineers.
Brand reviews, error codes and buying advice
Fujitsu Air Conditioning Review — Are They Worth It?
Fujitsu air conditioning is going through a name change, but the engineering behind it hasn’t gone anywhere. Here’s an honest look at the current UK range, the published figures and where it fits.
Read the guidePanasonic Air Conditioning Review — Is It Worth Buying?
Panasonic makes two wall-mounted ranges most UK homes choose between: the compact TZ and the premium Etherea. Here’s how they compare on the figures, and what the warranty asks of you.
Read the guideToshiba Air Conditioning Review — UK Engineer Assessment
Toshiba’s UK wall-mounted range runs from the value-led Seiya to the fabric-covered Haori. Here’s what each one offers on Toshiba’s own figures, and where we’d use it.
Read the guideSamsung Air Conditioning Error Codes: Complete Guide
A blinking code on a Samsung indoor unit tells you where the system thinks the problem is. Here’s what the common codes mean, according to Samsung, and what’s safe to do next.
Read the guideLG Air Conditioning Review — Honest Assessment from UK Engineers
LG sells a broad UK range, from the DUALCOOL Standard Plus to ARTCOOL units with a photo display. Here’s what the figures say, what the warranty really covers and where LG makes sense.
Read the guideMitsubishi Electric vs Daikin Air Conditioning: Which Should You Choose?
Both are excellent, and both are among the brands we’re asked about most. The real differences are in the ranges, the apps and, above all, the warranty terms.
Read the guideAir Conditioning Warranty: What Is and Isn’t Covered
The warranty on an air conditioning system comes from the manufacturer, and its length often depends on who installs it. Here’s what each major brand’s UK terms say, and how to keep your cover valid.
Read the guideMitsubishi Electric Air Conditioning Error Codes: Complete Guide
Mitsubishi Electric units report faults in two ways: a blinking indicator on wall units, or a check code on a wired controller. Here’s how to read both, using Mitsubishi Electric’s own manuals.
Read the guideBest Air Conditioning Units for UK Homes 2026: Buyer’s Guide
There isn’t one best air conditioner, but there is a best one for your room. Here are the units we’d short-list in 2026, grouped by what matters most to you, with the figures to back them up.
Read the guideR32 vs R410A Refrigerant: What You Need to Know
R410A was the standard refrigerant for years. R32 has replaced it in new split systems. Here’s why, and what it means if you already own an R410A system.
Read the guideDaikin Air Conditioning Error Codes: Complete Guide
Daikin uses a letter and a number for every fault, from A3 for a drain problem to U4 for a communication error. Here’s what the codes mean, taken from Daikin’s own chart.
Read the guideSmart Air Conditioning: Apps, Voice Control and Home Automation
Most new air conditioning can be controlled from your phone, but not every unit has Wi-Fi built in. Here’s what each brand offers and how to get the most from it.
Read the guideAir Conditioning Energy Efficiency: SCOP, SEER and EPC Explained
SEER and SCOP tell you how much heating or cooling you get for each unit of electricity. Here’s how to read them, what the energy label classes mean and what the difference is worth.
Read the guideCosts, grants, planning and regulations
Air Conditioning and Building Regulations: What You Need to Know
Fitting air conditioning rarely needs a building control application, but parts of the job are still covered by the regulations. The electrics are the main one.
Read the guideHow Much Does Air Conditioning Cost in the UK? 2026 Complete Guide
A single room split system typically costs £1,200–£2,200 + VAT fitted. Here’s our full price table, what the price includes, what pushes it up and four real jobs we’ve completed.
Read the guideHeat Pump vs Air Conditioning: What’s the Difference?
Most modern air conditioning is a heat pump. The real difference is between air-to-air systems that heat and cool rooms, and air-to-water systems that run your radiators and hot water.
Read the guideAir Conditioning F-Gas Regulations: What Businesses Must Know
If your business runs air conditioning, F-Gas law gives you duties: leak checks based on the system’s size, records kept for five years and certified contractors for the work.
Read the guideHow Much Does It Cost to Run Air Conditioning in the UK? 2026 Guide
Running cost is simple arithmetic: power drawn × hours × your unit rate. Here’s the sum worked through with the current Ofgem price cap, so you can swap in your own numbers.
Read the guideDo I Need Planning Permission for Air Conditioning in the UK?
Often you won’t, but the answer depends on what the unit does, where it goes and what kind of property you have. Cooling-only units, listed buildings and flats are the main exceptions.
Read the guideAir Conditioning Installation Cost: What the Quote Should Include
Two quotes for the same room can be hundreds of pounds apart because they describe different jobs. This checklist shows what a complete quote should say, line by line.
Read the guideAir Source Heat Pump Cost UK 2026: Complete Guide
An air-to-water heat pump typically costs £8,000–£16,000 installed in a home, with 0% VAT until 31 March 2027 and a £7,500 grant available if you qualify.
Read the guideLocal price guides
Air Conditioning Cost in Burgess Hill and Haywards Heath: Mid Sussex Guide
Burgess Hill and Haywards Heath share a district council, a railway line and the same price bands. The homes can be quite different, and that’s where quotes start to differ.
Read the guideAir Conditioning Cost in Chichester and Bognor Regis: 2026 Guide
A cathedral city and a seaside town a few miles apart, under two different councils. Here’s how that affects a quote for air conditioning.
Read the guideAir Conditioning Cost in Horsham: How Your Quote Is Built
Rather than a list of averages, this guide walks through how we arrive at a fixed price for a home or business in Horsham.
Read the guideAir Conditioning Installation Cost in Brighton and Hove: 2026 Price Guide
Brighton and Hove has a long seafront, more than thirty conservation areas and plenty of shared buildings. Each one affects how an installation is planned and priced.
Read the guideAir Conditioning Cost in Worthing: Your Questions Answered
The questions Worthing homeowners and businesses ask most, answered with our real price bands and the local planning picture.
Read the guideAir Conditioning Installation Cost in Crawley: 2026 Price Guide
Crawley grew as a new town built around neighbourhoods, and it is still growing. Here is what that means for the cost of fitting air conditioning.
Read the guideAir Conditioning Cost in Dorking and Leatherhead: 2026 Price Guide
Both towns sit in Mole Valley, where some conservation areas carry extra planning controls. Here’s how that, and the countryside around them, affects the cost.
Read the guideAir Conditioning Cost in Guildford: 2026 Price Guide
Four example jobs show how a Guildford quote moves within our price bands, followed by the planning and grant rules that apply in the borough.
Read the guideAir Conditioning Cost in Haywards Heath: 2026 Price Guide
A guide for Haywards Heath and the villages next to it, Cuckfield and Lindfield, where conservation areas and home offices shape many quotes.
Read the guideAir Conditioning Cost in Hastings and Bexhill: 2026 Price Guide
Two seaside towns, two councils and a lot of conservation areas between them. Here’s what that means when you want air conditioning fitted.
Read the guideAir Conditioning Cost in Bromley and Orpington: 2026 Price Guide
Bromley and Orpington share a London borough council. Here’s how prices, planning and the practical London questions work there.
Read the guideAir Conditioning Cost in Lewes and Eastbourne: 2026 Price Guide
Lewes sits inside the South Downs National Park; Eastbourne faces the Channel. The price bands are the same, but the planning and the outdoor unit plan are not.
Read the guideAir Conditioning Cost in East Grinstead: 2026 Price Guide
East Grinstead is where AirCon Doctor is based. This guide sets out our prices for the town and how a job runs from the first call to the handover.
Read the guideAir Conditioning Cost in Richmond and Twickenham: 2026 Price Guide
The borough has more than seventy conservation areas and plenty of flats. A short checklist before you ask for a quote will save weeks later.
Read the guideAir Conditioning Cost in the Crawley and Gatwick Area: Full 2026 Guide
Around Gatwick, the county line runs between Crawley and Horley. This guide covers homes and businesses on both sides.
Read the guideAir Conditioning Cost in Woking and Camberley: 2026 Price Guide
Woking and Camberley are in different boroughs today and will be in the same new council from April 2027. Here’s what that means for your quote.
Read the guideAir Conditioning Cost in Farnham and Godalming: 2026 Price Guide
Both towns have historic centres protected by Waverley Borough Council. That shapes where an outdoor unit can go, and so what the job costs.
Read the guideAir Conditioning Cost in Croydon: 2026 Price Guide
Croydon mixes a large town centre with suburban streets. This guide splits the costs by the kind of building you’re in.
Read the guideAir Conditioning Cost in Sutton and Epsom: 2026 Price Guide
Sutton is a London borough and Epsom is in Surrey, only a few miles apart. The price bands match; the councils and some of the practicalities don’t.
Read the guideAir Conditioning Cost in Wimbledon and Kingston: 2026 Price Guide
Wimbledon is in Merton; Kingston has its own Royal Borough. Both have many conservation areas, so the outdoor unit position is where most of the thinking goes.
Read the guideAir Conditioning Cost in Reigate and Redhill: 2026 Price Guide
Twin towns under one borough council, each with its own conservation areas. Here’s our pricing and what to check before you book.
Read the guideAir Conditioning Cost in Crowborough and Uckfield: 2026 Guide
Two Wealden towns with conservation areas at their centres and plenty of rural homes around them. Here’s what that means for cost and grants.
Read the guideGuides for homes and businesses
Air Conditioning for Gyms: Installation Guide
A gym is one of the hardest rooms to keep comfortable. Here’s how we approach gym air conditioning installation, from the heat load and fresh air to where the units go and how the system is looked after.
Read the guideAir Conditioning Maintenance Contract: What It Includes and Is It Worth It?
A maintenance contract turns servicing into a plan rather than a reminder. Here’s what a good one covers, what to check before you sign, and when it makes sense.
Read the guideAir Conditioning for Medical and Dental Practices
Clinics need cooling that’s quiet, easy to keep clean and planned around patients. Here’s what practice managers should think about before installing air conditioning.
Read the guideMulti-Split Air Conditioning: Is It Right for Your Home?
One outdoor unit, several rooms. Multi-split is often the neatest way to cool and heat more than one room, but it isn’t always the best. Here’s how to decide.
Read the guideAir Conditioning for Restaurants: Installation Guide
A restaurant needs a dining room that stays comfortable on a full Saturday night and a kitchen that staff can work in. Here’s how we approach both.
Read the guideAir Conditioning for Hotels: A Property Manager’s Guide
Guests notice a hot room immediately, and a noisy unit at 2am even more. Here’s what hotel managers should plan for when installing or replacing air conditioning.
Read the guideAir Conditioning for Schools and Colleges
Most schools can’t air condition everything at once. Here’s how to decide where cooling makes the biggest difference, and how to plan the work around the school year.
Read the guideHow Air Conditioning Works: A Plain English Explanation
Air conditioning doesn’t make cold. It moves heat from one place to another. Once you see how, a lot of everyday questions about your system make sense.
Read the guideAir Conditioning for Conservatories: Is It Worth It?
Too hot in summer, too cold in winter: a conservatory is the classic problem room. Air conditioning can fix both, if it’s sized for the glass and placed with care.
Read the guideDucted Air Conditioning: Is It Right for Your Home?
Ducted air conditioning hides almost everything: all you see is a grille. It’s a great fit for some homes and impractical in others. Here’s how to tell which yours is.
Read the guideAir Conditioning vs Portable Air Conditioner: Which Is Better?
A portable unit is cheap to buy and you can have it running tonight. A fixed split system costs more but works very differently. Here’s an honest comparison.
Read the guideHow Long Does Air Conditioning Last? Lifespan and Replacement Guide
There’s no fixed age when air conditioning wears out. How long yours lasts depends on how it was installed, how hard it works and how it’s looked after.
Read the guideAir Conditioning for Landlords: Complete Buy-to-Let Guide
Adding air conditioning to a rental property brings a few extra duties along with the comfort. Here’s what landlords should sort out before and after installation.
Read the guideAir Conditioning Annual Service: What’s Included and Why It Matters
A proper service is more than a filter wash. Here’s what our engineers do on an annual visit, why each step matters, and what you should get at the end.
Read the guideAir Conditioning for Retail: Shop and Showroom Guide
A shop has big windows, a door that’s always opening and lights on all day. Here’s how to get air conditioning that copes, without cluttering the sales floor.
Read the guideAir Conditioning for Offices: What You Need to Know
Too hot in July and arguments over the thermostat all year: office cooling is about more than buying units. Here’s what office managers need to know before they start.
Read the guideWhy Is My Air Conditioning Leaking Water? Causes and Fixes
Water dripping from an indoor unit is almost always condensate that can’t get away. Here’s how to work out why, what you can safely check and when to call an engineer.
Read the guideAir Conditioning with Solar Panels: Can They Work Together?
The hottest days are usually the sunniest ones, so solar panels and air conditioning are a natural pairing. Here’s how to get the most from them, without overstating the savings.
Read the guideHow to Choose the Right Size Air Conditioning Unit
Picking a unit by room size alone is the most common sizing mistake. Here’s how an engineer works out what a room really needs, and why getting it right matters.
Read the guideCan Air Conditioning Improve Air Quality?
Air conditioning can make indoor air feel better, but it isn’t a ventilation system or a cure-all. Here’s an honest look at what it does for the air you breathe.
Read the guideHow to Prepare Your Air Conditioning for Summer: 5 Essential Checks
The first hot day is the worst time to discover a fault. These five checks take a few minutes in spring and catch most problems before you need the cooling.
Read the guideMore guides
Air Conditioning for Server Rooms: Complete Guide
A server room makes heat every hour of every day, and it keeps making it in January. Here’s how to size, design and look after cooling that won’t let your IT down.
Read the guideAir Conditioning Installation in a Listed Building: Complete Guide
Air conditioning and listed buildings can work together, but only with consent and a design that respects the building. Here’s how the process works and what tends to help.
Read the guideAir Conditioning for Holiday Lets and Airbnb Properties
Guests notice a hot bedroom. Hosts notice a unit left running with the windows open. Here’s how to plan air conditioning that suits a let, not just a home.
Read the guideAir Conditioning Not Cooling: Causes and How to Fix It
If the unit is running but the room isn’t getting cooler, start with a few simple checks. If those don’t fix it, here’s what an engineer will be looking for.
Read the guideAir Conditioning for Care Homes: A Manager’s Guide
Older residents are among the people most at risk in hot weather. Here’s how cooling fits into a care home’s heat plan, and what to think about before you install it.
Read the guideWhat Is VRF Air Conditioning? Guide for Business Owners
VRF lets one refrigerant system serve many rooms, each with its own control. Here’s how it works, when it’s the right choice and what owning one involves.
Read the guideAir Conditioning Noise: How Quiet Are Modern Systems?
Modern units can be very quiet, but where they’re fitted matters as much as what’s fitted. Here’s how to read the noise figures and avoid the common mistakes.
Read the guideCommercial Air Conditioning: What Businesses Need to Know
Commercial systems come with legal duties that homes don’t. Here’s what business owners and facilities managers need to know, from F-Gas to TM44.
Read the guideHow to Clean Air Conditioning Filters: Step by Step Guide
Washing the filters is the one maintenance job most owners can do themselves. It takes a few minutes and makes a real difference to airflow.
Read the guideAir Conditioning for a Home Office: Complete Guide 2026
A small room, a sunny window and a desk full of electronics can make a home office the hottest room in the house. Here’s how to cool it properly.
Read the guideAir Conditioning for Apartments and Flats: Complete Guide
Flats are some of the hardest homes to keep cool, and the hardest to fit. Here’s how to deal with consent, outdoor unit positions and the practical details.
Read the guideAir Conditioning Regas: What It Is and When You Need It
A properly working system never needs topping up. If yours does, it has a leak. Here’s what a proper regas involves and why the leak has to be fixed first.
Read the guideAir Conditioning for Living Rooms: What You Need to Know
Living rooms are big, bright and full of people, which makes them harder to cool well than a bedroom. Here’s how to size it, place it and keep it looking good.
Read the guideAir Conditioning for Garden Rooms and Outbuildings
A garden room can be too hot in July and too cold in January. A reversible split system can fix both, if the power, pipework and building are right.
Read the guideWhat Happens During an Air Conditioning Emergency Call-Out
When cooling fails in a server room, a care home or a packed restaurant, you need a clear plan. Here’s what happens from the moment you call.
Read the guideAir Conditioning for Bedrooms: Complete Guide 2026
A hot bedroom is one of the most common reasons people call us about air conditioning. Here’s how to choose and place a unit you’ll barely notice at night.
Read the guideAir Conditioning for New Builds: Developer and Buyer Guide
It’s far easier to plan air conditioning before the walls are plastered than after. Here’s what developers can build in, and what buyers should check.
Read the guideHow to Find a Good Air Conditioning Engineer Near You
The right engineer is legally qualified, surveys before quoting and explains the warranty honestly. Here’s how to check, and which warning signs to look for.
Read the guideAir Conditioning in a Heatwave: How to Get the Most from Your System
In extreme heat even a good system can struggle. A few simple habits help it keep up, and a few warning signs tell you when it needs help.
Read the guideAir Conditioning Installation: What to Expect on the Day
A good installation is mostly careful preparation and testing you never see. Here’s what happens on the day, step by step, and what you should get at the end.
Read the guideAir Conditioning in Winter: Using Heat Pump Mode Effectively
Most split systems are heat pumps, so they can heat as well as cool. Here’s how heating mode works, how to work out what it costs and how to use it well.
Read the guideNew guides
The £2,500 Boiler Upgrade Scheme Grant for Air-to-Air Heat Pumps
Air-to-air heat pumps can now attract a Boiler Upgrade Scheme grant. It is £2,500, not £7,500, and it comes with conditions that rule many homes out. Here is how it works.
Read the guide0% VAT on Air Conditioning and Heat Pumps: What HMRC Says
Installing a heat pump in a home is zero-rated for VAT until 31 March 2027. Many air conditioning systems are heat pumps, but not every job qualifies. Here are HMRC’s rules in plain English.
Read the guideThe 2027 F-Gas Phase-Down in Great Britain: What It Means for You
On 1 January 2027 the amount of HFC refrigerant allowed onto the GB market takes another step down. Your system stays legal, but older refrigerants will get harder to buy.
Read the guideR410A and R22 Air Conditioning: Repair or Replace?
Older systems run on refrigerants that are being phased out. R22 can no longer be topped up at all. R410A can, but it is getting harder to buy. Here is how to decide.
Read the guideWhy Does My Air Conditioning Smell?
A smell from your air conditioning is a symptom, not a fault in itself. Most are caused by dirt and moisture inside the indoor unit. A few need an engineer straight away.
Read the guideIce on Your Air Conditioning Unit: What It Means and What to Do
Ice where it shouldn’t be is a warning sign. Frost on an outdoor heat pump in winter usually isn’t. Here is how to tell the difference.
Read the guideWhere to Put an Air Conditioning Outdoor Unit
The outdoor unit decides how well your system performs, how much your neighbours hear it and whether you need planning permission. It deserves as much thought as the indoor unit.
Read the guideAir Conditioning Condensate Pumps: When You Need One
Every air conditioning system makes water. Where it can’t run away by gravity, a small pump does the job. Here is how they work and how to keep them reliable.
Read the guideAir Conditioning Electrics: New Circuits and Part P
Most fixed air conditioning needs a dedicated electrical supply. In England that is usually notifiable work under Part P of the Building Regulations. Here is what that means.
Read the guideAir Conditioning in a Leasehold Flat: Getting Consent
If you own a leasehold flat, the walls the outdoor unit goes on probably aren’t yours. Getting the right consent first saves disputes later.
Read the guideDIY Pre-Charged Air Conditioning Kits: What the F Gas Rules Say
Pre-charged split kits with quick-connect pipes look like a weekend job. Under GB F gas law, installing a split system is work for a qualified engineer. Here is why.
Read the guideAir Conditioning Indoor Unit Types Compared
The outdoor unit does the hard work, but the indoor unit is what you live with. Here are the main types and where each one makes sense.
Read the guideDesign Air Conditioning Units: Options for Stylish Interiors
If a plain white box would spoil the room, you have choices: design-led wall units, low-profile floor consoles, or systems you barely see at all.
Read the guideAir Conditioning for Loft Conversions
Heat rises, roofs soak up sun and loft rooms are often the hottest in the house. Air conditioning can fix that, and it is easiest when planned early.
Read the guideWhat Happens at an Air Conditioning Site Survey
A site survey is the diagnosis before the treatment. It is where we work out what your property needs, so the quote is fixed and the install day holds no surprises.
Read the guideLiving with air conditioning
Air Conditioning and Pets: What Owners Should Know
A cooler home in summer helps the whole household, pets included. Here’s how to set up and run air conditioning around animals, and the simple things that keep the system working well.
Read the guideKeeping Elderly Relatives Cool in a Heatwave
The NHS names people aged 65 and over among those more vulnerable in hot weather. If you’re thinking about cooling for a parent or grandparent’s home, here’s how to plan it sensibly.
Read the guideAir Conditioning in a Baby’s Nursery
The NHS advises keeping a baby’s room at about 16 to 20°C. In a hot summer that can be hard without help. Here’s how air conditioning can be set up safely and sensibly in a nursery.
Read the guideAir Conditioning Dry Mode: Can It Help With Damp?
Most air conditioning remotes have a water-drop button marked Dry. It takes moisture out of the air, which can help with condensation, but it isn’t a cure for every kind of damp.
Read the guideRunning Air Conditioning and Heat Pumps on a Time-of-Use Tariff
Time-of-use tariffs charge less for electricity at some times of day and more at others. Air conditioning and heat pumps can often shift their running into the cheaper periods. Here’s how.
Read the guideDoes Air Conditioning Add Value to a House?
It can make a home more appealing, but there’s no reliable figure for what it adds. Here’s what affects whether air conditioning helps a sale, and what paperwork to keep.
Read the guideCoastal Air Conditioning: Protecting Units From Salt Air
Salt spray and onshore winds speed up corrosion on outdoor units. If your home or business is near the coast, the right model, the right spot and regular rinsing make a real difference.
Read the guideTM44 Air Conditioning Inspections Explained
If the air conditioning in a building adds up to more than 12 kW, the law in England and Wales requires an inspection at least every five years. Here’s who it applies to and how to prepare.
Read the guideAir Conditioning for Hair and Beauty Salons
Hairdryers, straighteners, lights and a full appointment book make salons warm places to work. Here’s how to cool a salon comfortably without blowing on wet hair or ignoring ventilation.
Read the guideAir Conditioning for Veterinary Practices
A vet practice is a clinic, a pharmacy, a hospital ward and a reception area under one roof. Each part has different cooling needs. Here’s how to plan a system that suits them all.
Read the guideWarehouse Air Conditioning and Cooling
Warehouses are big, tall and open to the outside every time a door goes up. Cooling the whole volume is rarely sensible. Here’s how to target the places that matter.
Read the guideHeating and Cooling Churches and Village Halls
Buildings used a few hours a week need heat quickly and nothing in between. Air-to-air heat pumps can do that. Here’s how they fit churches and village halls, and the permissions to check first.
Read the guideAir Conditioning Hire vs Permanent Installation
Hire is the quick answer to a short-term problem. Installation is the better answer to a problem that comes back every summer. Here’s how to decide.
Read the guideAir Curtains Explained
An air curtain blows a stream of air down across an open doorway to separate inside from outside. Here’s how they work, the types available and where they make sense.
Read the guide