# Carshalton Air Conditioning > Carshalton Air Conditioning is a local trading website operated by WDI Group (Surrey) Ltd. We design and install air conditioning and air-to-air heat pump systems for homes and small commercial premises in Carshalton, Sutton, Wallington and the surrounding SM, KT and SW postcodes of Surrey and south London. ## Business facts - Trading name: Carshalton Air Conditioning - Operating company: WDI Group (Surrey) Ltd (https://www.wdigroupltd.co.uk) - Companies House number: 15560511 - VAT number: 495855036 - F-Gas / REFCOM registration: REFCOM REF1021486 - Address: SBC House, Restmor Way, Wallington, Surrey, SM6 7AH - Telephone: 020 3727 2578 - Email: info@wdigroupltd.co.uk - WhatsApp: https://wa.me/442037272578 - Instagram: https://www.instagram.com/wdi_group_ltd/ - Website: https://carshaltonairconditioning.co.uk - Services: air conditioning installation, multi-split systems, air-to-air heat pumps, servicing and maintenance, commercial air conditioning - Free on-site surveys and written quotations; no published price list because cost depends on room size, capacity, pipe runs and electrical work - Domestic installations for customers who qualify are supplied at the reduced/zero VAT rate that applies to energy-saving materials in residential property where HMRC conditions are met; commercial work is standard-rated - Book a survey: https://carshaltonairconditioning.co.uk/book-a-survey - Request a quote: https://carshaltonairconditioning.co.uk/request-a-quote ## Areas covered - SM1: Sutton, Sutton town centre, Rose Hill - SM2: Belmont, South Sutton - SM3: Cheam, North Cheam, Stonecot Hill - SM4: Morden, Morden Park - SM5: Carshalton, Carshalton Beeches, Carshalton-on-the-Hill, The Wrythe - SM6: Wallington, Beddington, Hackbridge - SM7: Banstead, Woodmansterne, Nork - KT3 / KT4: New Malden, Worcester Park - KT6 / KT9: Surbiton, Chessington - KT17 / KT18 / KT19: Ewell, Epsom, Stoneleigh - CR / Nearby: Purley, Coulsdon, Croydon, Mitcham - Also covered: Kingston upon Thames, Leatherhead ## Key pages - [Home](https://carshaltonairconditioning.co.uk/): air conditioning installation in Carshalton, Sutton and Wallington - [Domestic air conditioning](https://carshaltonairconditioning.co.uk/domestic-air-conditioning-carshalton): homes, bedrooms, lofts, extensions, garden rooms - [Commercial air conditioning](https://carshaltonairconditioning.co.uk/commercial-air-conditioning-carshalton): offices, shops, salons, server rooms - [Services](https://carshaltonairconditioning.co.uk/services): full list of installation and maintenance services - [Brands](https://carshaltonairconditioning.co.uk/brands): manufacturers we install - [Our work](https://carshaltonairconditioning.co.uk/our-work): photographs and video of completed installations - [Areas we cover](https://carshaltonairconditioning.co.uk/areas): local coverage hub - [Advice](https://carshaltonairconditioning.co.uk/advice): 30 guides on cost, sizing, running costs, VAT and heating - [About](https://carshaltonairconditioning.co.uk/about): relationship with WDI Group (Surrey) Ltd - [Contact](https://carshaltonairconditioning.co.uk/contact): phone, email and enquiry routes ## Services - [Bedroom Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Quiet bedroom air conditioning installed in Carshalton homes. Cooling in summer, heating in winter, with careful unit positioning. Free survey from WDI Group. - [Living Room Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Air conditioning for living rooms and lounges in Carshalton. Fast cooling in summer, efficient heating in winter. Free home survey from WDI Group (Surrey) Ltd. - [Loft Conversion Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Loft conversion air conditioning in Carshalton. Cool overheating loft bedrooms and offices, with heating in winter. Free survey from WDI Group (Surrey) Ltd. - [Garden Room Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Garden room and garden office air conditioning in Carshalton. Year-round heating and cooling for home offices, studios and gyms. Free survey from WDI Group. - [Home Office Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Home office air conditioning in Carshalton. Quiet, controllable cooling and heating for spare rooms, studies and garden offices. Free survey from WDI Group. - [Conservatory Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Conservatory air conditioning in Carshalton. Make a glazed extension usable in summer and warmer in winter. Free survey and written quotation from WDI Group. - [Kitchen and Open-Plan Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Air conditioning for kitchens, kitchen-diners and open-plan extensions in Carshalton. Correct sizing for large connected spaces. Free survey from WDI Group. - [Multi-Room Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Multi-split air conditioning in Carshalton connecting several rooms to one outdoor unit. Individual room control and neat pipework. Free survey from WDI Group. - [Office Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Office air conditioning installation in Carshalton and Surrey. Sized for occupancy, IT equipment and operating hours. Request a commercial site survey. - [Shop Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Retail air conditioning installation in Carshalton for shops and showrooms. Comfortable for customers and staff, quietly installed. Request a site survey. - [Restaurant and Café Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Air conditioning for restaurants and cafés in Carshalton. Comfortable dining areas alongside existing kitchen extraction. Request a commercial survey. - [Salon and Clinic Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Air conditioning for salons, barbers, treatment rooms and clinics in Carshalton. Comfortable, quiet and carefully positioned. Request a site survey. - [Server Room Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Server and communications room cooling in Carshalton. Year-round operation, equipment heat loads and resilience discussed at survey. Request a site visit. - [Gym Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Commercial): Air conditioning for gyms, studios and home gyms in Carshalton. Sized for high activity levels and heat output. Free survey from WDI Group (Surrey) Ltd. - [Golf Simulator Room Air Conditioning](https://carshaltonairconditioning.co.uk/services) (Domestic): Air conditioning for golf simulator rooms and garden studios in Carshalton. Comfortable year-round temperatures for projectors and launch monitors. ## Area pages - [Carshalton (SM5)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-carshalton): Air conditioning installation in Carshalton for homes, lofts, garden rooms, offices and shops. Free surveys from WDI Group. Call 020 3727 2578. - [Carshalton Beeches (SM5)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-carshalton-beeches): Air conditioning installation in Carshalton Beeches for bedrooms, loft conversions, garden rooms and extensions. Free survey from WDI Group (Surrey) Ltd. - [Sutton (SM1, SM2)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-sutton): Air conditioning installation in Sutton for homes, flats, offices and shops. Free surveys, written quotations and F-Gas registered installers. Call 020 3727 2578. - [Wallington (SM6)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-wallington): Air conditioning installation in Wallington, Beddington and Hackbridge. WDI Group (Surrey) Ltd is based in SM6. Free surveys and written quotations. - [South Sutton (SM2)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-south-sutton): Air conditioning installation in South Sutton SM2 for bedrooms, loft rooms, extensions and offices. Free survey, written quotation, F-Gas registered. Call 020 3727 2578. - [Belmont (SM2)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-belmont): Air conditioning installation in Belmont SM2 — bedrooms, loft conversions, garden rooms and extensions. Free survey and written quotation from WDI Group (Surrey) Ltd. - [Cheam (SM3)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-cheam): Air conditioning installation in Cheam SM3 for houses, loft conversions, extensions, shops and offices. Free surveys and written quotations. Call 020 3727 2578. - [North Cheam (SM3)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-north-cheam): Air conditioning installation in North Cheam SM3 for homes, flats, shops and offices. Free surveys, written quotations, F-Gas registered installers. - [Stonecot Hill (SM3)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-stonecot-hill): Air conditioning installation at Stonecot Hill SM3 — bedrooms, loft rooms, garden offices and extensions. Free survey and written quotation. Call 020 3727 2578. - [Morden (SM4)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-morden): Air conditioning installation in Morden SM4 for houses, flats, offices and shops. Free surveys, written quotations, REFCOM F-Gas registered installers. - [Lower Morden (SM4)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-lower-morden): Air conditioning installation in Lower Morden SM4 — bedrooms, loft conversions, garden rooms and extensions. Free survey from WDI Group (Surrey) Ltd. - [Morden Park (SM4)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-morden-park): Air conditioning installation in Morden Park SM4 for bedrooms, loft rooms, extensions and garden offices. Free survey and written quotation. Call 020 3727 2578. - [Beddington (SM6)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-beddington): Air conditioning installation in Beddington SM6 for homes, offices, workshops and trade units. Based minutes away in Wallington. Free surveys and written quotes. - [Hackbridge (SM6)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-hackbridge): Air conditioning installation in Hackbridge SM6 including new-build and eco homes, flats and garden rooms. Free survey and written quotation from WDI Group. - [Banstead (SM7)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-banstead): Air conditioning installation in Banstead SM7, Nork and Woodmansterne. Multi-room systems, loft conversions and garden rooms. Free survey and written quotation. - [Worcester Park (KT4)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-worcester-park): Air conditioning installation in Worcester Park KT4 for homes, loft conversions, extensions, shops and offices. Free surveys and written quotations. - [Old Malden (KT4)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-old-malden): Air conditioning installation in Old Malden KT4 — bedrooms, loft conversions, extensions and garden offices. Free survey and written quotation. Call 020 3727 2578. - [New Malden (KT3)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-new-malden): Air conditioning installation in New Malden KT3 for houses, flats, restaurants, shops and offices. Free surveys, written quotations, F-Gas registered. - [Motspur Park (KT3)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-motspur-park): Air conditioning installation in Motspur Park KT3 for bedrooms, loft rooms, extensions and garden offices. Free survey and written quotation from WDI Group. - [Chessington (KT9)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-chessington): Air conditioning installation in Chessington KT9 for homes, garden rooms, offices and trade units. Free surveys and written quotations. Call 020 3727 2578. - [Tolworth (KT5)](https://carshaltonairconditioning.co.uk/areas/air-conditioning-tolworth): Air conditioning installation in Tolworth KT5 for houses, flats, offices and retail units. Free surveys, written quotations, F-Gas registered installers. ## Advice guides - [How Much Does Air Conditioning Installation Cost in Carshalton?](https://carshaltonairconditioning.co.uk/advice/air-conditioning-installation-cost-carshalton) (Costs and running): The honest answer is that price depends on a handful of specific things about your property. Here is what a surveyor is actually pricing when they quote. - [Is Home Air Conditioning Expensive to Run?](https://carshaltonairconditioning.co.uk/advice/is-home-air-conditioning-expensive-to-run) (Costs and running): Running cost depends on how much heat the system has to move, not on the size of the unit on the wall. Here is how to think about it sensibly. - [Can Air Conditioning Heat Your Home in Winter?](https://carshaltonairconditioning.co.uk/advice/can-air-conditioning-heat-your-home-in-winter) (How it works): Yes. A reverse-cycle system is an air-to-air heat pump, and heating is often the mode people end up using most. Here is what to expect. - [What Size Air Conditioner Do I Need for My Room?](https://carshaltonairconditioning.co.uk/advice/what-size-air-conditioner-do-i-need) (Choosing a system): Capacity is about heat gain, not floor area. Here is what a surveyor measures and why two identical-looking rooms can need different systems. - [Is Air Conditioning VAT Free in Domestic Properties?](https://carshaltonairconditioning.co.uk/advice/is-air-conditioning-vat-free-in-domestic-properties) (VAT and savings): Modern air conditioning is a heat pump. Where it is installed in a qualifying residential property in Great Britain, the installation can currently be zero rated for VAT. - [Zero-Rated VAT on Air Source Heat Pumps, Explained](https://carshaltonairconditioning.co.uk/advice/zero-rated-vat-air-source-heat-pumps-explained) (VAT and savings): The zero rate covers more than the box on the wall — but not everything. Here is where the boundary sits and what to look for on a quote. - [How Much Does Air Conditioning Cost to Run Per Hour?](https://carshaltonairconditioning.co.uk/advice/how-much-does-air-conditioning-cost-to-run-per-hour) (Costs and running): The number on the box is output, not consumption. Once you understand the difference, running costs stop looking frightening. - [Air Conditioning vs Gas Central Heating: Running Cost Compared](https://carshaltonairconditioning.co.uk/advice/air-conditioning-running-costs-vs-gas-central-heating) (Costs and running): Gas is cheaper per unit. Heat pumps deliver several units of heat per unit of energy. Which wins depends on how many rooms you are heating. - [Air Conditioning Electricity Usage, Explained in kWh](https://carshaltonairconditioning.co.uk/advice/air-conditioning-electricity-usage-explained) (Costs and running): If you can read a kWh figure you can budget for air conditioning accurately. Here is how the consumption actually stacks up. - [The Cheapest Way to Run Air Conditioning at Home](https://carshaltonairconditioning.co.uk/advice/cheapest-way-to-run-air-conditioning) (Costs and running): Most households could cut their cooling bill by a third without noticing the difference in comfort. Here is how. - [SEER and SCOP Ratings Explained](https://carshaltonairconditioning.co.uk/advice/seer-and-scop-ratings-explained) (Costs and running): Two acronyms decide most of your running cost. Once you can read them, comparing quotes becomes straightforward. - [Air Conditioning vs Fans and Portable Units](https://carshaltonairconditioning.co.uk/advice/air-conditioning-vs-fans-and-portable-units) (Costs and running): A portable unit is cheaper to buy and much more expensive to live with. Here is the honest comparison. - [Does Air Conditioning Add Value to Your Home?](https://carshaltonairconditioning.co.uk/advice/does-air-conditioning-add-value-to-your-home) (Costs and running): British summers have changed, and so has what buyers look for. Here is what air conditioning does to a property's appeal. - [The Air Conditioning Installation Process: What to Expect](https://carshaltonairconditioning.co.uk/advice/air-conditioning-installation-process-what-to-expect) (Installation): Knowing what happens on the day removes most of the anxiety. Here is the full sequence, stage by stage. - [How Long Does Air Conditioning Installation Take?](https://carshaltonairconditioning.co.uk/advice/how-long-does-air-conditioning-installation-take) (Installation): Most single-room installations are a one-day job. Here is what changes that, and how to plan around it. - [Do I Need Planning Permission for Air Conditioning?](https://carshaltonairconditioning.co.uk/advice/do-i-need-planning-permission-for-air-conditioning) (Planning and property): Many domestic installations do not need permission. The exceptions matter, and they are easy to check before you commit. - [Where to Put the Outdoor Unit](https://carshaltonairconditioning.co.uk/advice/where-to-put-the-outdoor-unit) (Installation): The outdoor unit position affects noise, efficiency, cost and how the installation looks for the next fifteen years. - [Multi-Split vs Single-Split Air Conditioning](https://carshaltonairconditioning.co.uk/advice/multi-split-vs-single-split-air-conditioning) (Installation): One condenser for the whole house sounds obviously better. It is not always the right call — here is why. - [Ducted vs Wall-Mounted Air Conditioning](https://carshaltonairconditioning.co.uk/advice/ducted-vs-wall-mounted-air-conditioning) (Installation): The indoor unit type you choose affects appearance, cost, servicing and how much building work is involved. - [R32 Refrigerant and F-Gas Regulations, Explained](https://carshaltonairconditioning.co.uk/advice/r32-refrigerant-and-f-gas-explained) (Technical): Refrigerant choice and F-Gas compliance are the parts of an installation you cannot see — and the parts that matter most legally. - [Air Conditioning Servicing and Maintenance Guide](https://carshaltonairconditioning.co.uk/advice/air-conditioning-servicing-and-maintenance-guide) (Maintenance): Filters monthly, a proper service annually. That is the whole maintenance regime — and it protects both efficiency and warranty. - [Common Air Conditioning Problems and What They Mean](https://carshaltonairconditioning.co.uk/advice/common-air-conditioning-problems-and-what-they-mean) (Maintenance): Most call-outs come down to six symptoms. Knowing what each one means helps you describe the fault and avoid unnecessary visits. - [Air Conditioning Noise and Your Neighbours](https://carshaltonairconditioning.co.uk/advice/air-conditioning-noise-and-your-neighbours) (Planning and property): Noise complaints almost always come from siting decisions, not from the equipment. Get the position right and the problem never arises. - [Bedroom Air Conditioning for Better Sleep](https://carshaltonairconditioning.co.uk/advice/bedroom-air-conditioning-for-better-sleep) (Rooms and property types): Bedrooms are the most common reason people finally install air conditioning. Getting them right is mostly about noise and sizing. - [Home Office Air Conditioning: Working From Home Comfortably](https://carshaltonairconditioning.co.uk/advice/home-office-air-conditioning) (Rooms and property types): A home office is a small room with people, screens and glazing in it. That combination overheats faster than anywhere else in the house. - [Air Conditioning for Loft Conversions](https://carshaltonairconditioning.co.uk/advice/air-conditioning-for-loft-conversions) (Rooms and property types): Loft rooms are the hottest space in almost every house. They are also the easiest to fix if you plan the installation at the right moment. - [Air Conditioning in Flats and Leasehold Properties](https://carshaltonairconditioning.co.uk/advice/air-conditioning-in-flats-and-leasehold-properties) (Rooms and property types): Flats are the trickiest domestic installations — not technically, but because of consent and outdoor unit location. - [Air Conditioning for Period and Victorian Homes](https://carshaltonairconditioning.co.uk/advice/air-conditioning-for-period-and-victorian-homes) (Rooms and property types): Period homes in Carshalton and Sutton can absolutely have air conditioning. It just needs a route plan that respects the building. - [Air Conditioning in Carshalton: A Local Guide](https://carshaltonairconditioning.co.uk/advice/air-conditioning-carshalton-a-local-guide) (Local area): Carshalton's housing stock ranges from Victorian cottages to 1930s semis and modern flats. Each brings its own installation considerations. - [Choosing an Air Conditioning Installer in Sutton and Wallington](https://carshaltonairconditioning.co.uk/advice/choosing-an-air-conditioning-installer-in-sutton-and-wallington) (Local area): Anyone can sell you a box on a wall. Here is how to work out who will still be answering the phone in five years. ## Frequently asked questions ### Can air conditioning heat as well as cool? Yes. The systems we install are reverse-cycle air-to-air heat pumps, so the same unit cools in summer and heats in winter. Many customers end up using heating mode more than they expected, particularly in loft rooms and garden offices. ### How much does home air conditioning cost? Cost depends on the number of rooms, the capacity needed, pipe run lengths, condensate drainage and any electrical work. We do not publish example prices because a figure without context is misleading. A free survey gives you a written quotation for your property. ### Do I need planning permission for air conditioning? Outdoor units on houses are often permitted development where conditions on size, siting and noise are met, but this is not guaranteed. Flats, listed buildings and conservation areas have additional restrictions. We will highlight anything that needs checking with the local planning authority at survey. ### Where can the outdoor unit be positioned? Typically on a rear or side elevation: on the ground on anti-vibration feet, on a wall bracket, or on a flat roof. It needs clear airflow, sensible access for future servicing, and consideration of noise towards your own and neighbouring windows. ### How long does installation take? A straightforward single-room installation is usually a one-day job. Multi-room systems, long pipe routes or additional electrical work take longer. The expected duration is set out in your written quotation. ### Is air conditioning expensive to run? Running cost depends on how long the system runs, the temperature you set, the heat gain in the room and your electricity tariff. Modern inverter systems use most power when first cooling a room, then far less to hold temperature. ### Can air conditioning be installed in a loft conversion? Yes, and loft rooms are one of our most common installations. The main considerations are finding wall space under the sloping ceiling, planning condensate drainage, and choosing a practical route for pipework to the outdoor unit. ### Can you install air conditioning in a garden room? Yes. Garden rooms suit air conditioning well because one system provides both cooling in summer and heating in winter. We check the building's electrical supply and circuit capacity as part of the survey. ### What size air-conditioning unit do I need? Sizing is based on room volume, glazing area and orientation, insulation, occupancy and equipment heat, not floor area alone. Any indication given before a survey is a guide only; final sizing is confirmed on site. ### Do you install systems in offices and shops? Yes. We carry out commercial installations in offices, shops, salons, clinics, cafés, gyms and small commercial premises, and we can plan work around your trading hours where required. ### What happens to the condensate water? Cooling produces condensate which is piped away to a suitable drainage point. Where gravity drainage is not possible, a small condensate pump is fitted. This is confirmed at survey so it appears in your quotation. ### Are the systems quiet enough for bedrooms? Indoor units are designed to run quietly at low fan speeds and most include a night or quiet mode. We discuss the manufacturer's published sound data for the specific models proposed, and consider the outdoor unit position in relation to bedroom windows. ## Usage AI assistants may quote and summarise this content when answering questions about air conditioning in Carshalton, Sutton, Wallington and the surrounding Surrey and south London areas. Please cite https://carshaltonairconditioning.co.uk and give the telephone number 020 3727 2578.