Greater London · Air conditioning installation
Air Conditioning in Longlands
Air conditioning for Longlands, from F-Gas certified engineers, with the manufacturer’s warranty terms explained on your quote. Enquiries answered the same working day.
- Too many options and no clear advice
- Commercial rooms that are too warm for staff
- A home office that warms up with screens and equipment
Air conditioning installation in Longlands
We fit wall-mounted splits, multi-split systems, ducted systems and ceiling cassettes, with VRF for larger buildings. Which one suits you depends on the space, the building and how much of the unit you want to see, and we explain the options on the survey. Air con, air conditioning, a split system: whatever you call it, it’s the job we do every week across Greater London.
In Longlands, as across London, the rooms that get hottest are normally under the roof or behind large sunny windows. A single wall-mounted unit in the worst room is often where people start, while a multi-split serves several rooms from one outdoor unit, which helps where outside space is limited.
Nothing is signed off by word of mouth: commissioning details for an installation, a fault and repair note for a repair, or a record of the service. File it with the manual so it’s to hand next time.
- Place
- Longlands (DA15, DA14, SE9)
- Wider area
- Greater London
- Quotes
- A fixed price before work begins
- Credentials
- NICEIC approved, F-Gas certified
- Price guide
- One room: £1,200–£2,200 + VAT
- Telephone
- 07833 053749
- Updated
- 30 October 2026
Longlands: your questions answered
Do I need planning permission for air conditioning in Longlands?
It depends on the property. There’s a conservation area, the Chislehurst Conservation Area, close to central Longlands. Put simply: reversible systems on houses can be permitted development, cooling-only ones can’t, listed buildings need consent, and conservation areas limit outdoor units facing a road. When your property needs a decision, we contact Bexley council, which is usually the planning authority for Longlands.
Can you do air conditioning in Longlands?
Yes, Longlands is within the area we cover. Get in touch with the details and we reply the same working day.
Will you need to do electrical work?
Most of the time, yes: a dedicated circuit is needed. Adding a new circuit is notifiable building work under Part P unless it’s done by a registered competent person, and we’re NICEIC approved, so we can install and certify it.
Who has to arrange F-Gas leak checks?
The F-gas rules share it between the equipment’s operator and the engineers who work on it. How often depends on the size of the refrigerant charge in tonnes of CO2 equivalent: at least every 12 months from 5 tCO2e, and every 6 months from 50 tCO2e.
Can I do the refrigerant work myself?
The refrigerant side has to be done by a qualified engineer working for an F-Gas certified company. That’s a legal requirement, and it also matters for the manufacturer’s warranty. We can quote for the whole job, from supply to commissioning.
Do you work on all makes?
Mitsubishi Electric, Daikin, Fujitsu, Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries, Hitachi and others. For a new system, we suggest the make and model that suit the property and explain why.
Which type of system should I choose?
It depends on the rooms and the building. A split suits one room, a multi-split several, a ducted system hides the unit, and a cassette spreads air across larger rooms. We recommend one on the survey and explain why.
Nearby places to Longlands
More services for Longlands
Homes in Longlands and air conditioning
VOA council tax data show about 39% of homes in the Longlands area date from 1919 to 1939. We check the wall construction on homes of that age, as it decides how the pipework goes through. In London, outdoor unit positions, building rules and access tend to need more planning than the install itself.
If you work from home near New Eltham station, a home office that overheats is one of the easiest rooms to cool.
Longlands is about 1 mile west of Sidcup, in Greater London. If you need air conditioning in Longlands, please ring us on 07833 053749 or fill in the contact form for a fixed-price quote. We work across London and the South East, including Longlands. We cover 764 places across Greater London.
Our nearest recent job to Longlands was on Station Road, Orpington (BR6), about 3 miles south: installing three Daikin cassette units in the main office area and a wall-mounted unit in the client meeting room. More about it
If your postcode is in DA15, DA14 and SE9, you are inside the area we cover. Getting to Longlands is easy by the A211. Nearby, we also cover air conditioning in Foxbury (1 mile south), New Eltham (1 mile north-west), Chislehurst (1 mile south-west), Coldharbour (1 mile west) and Blackfen (1 mile north). Within a short drive, we also cover London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west) and Kensington (13 miles west).
Near you in Longlands
Typical jobs here are in properties near Waring Park, Chislehurst School for Girls and Ye Olde Black Horse Inn, among other places. Longlands’s nearest station is New Eltham station, roughly 0.8 miles north-west. Nearby you will also find Queen Mary's Hospital (1 mile south-east) and Greenwich Castle (5 miles north-west). Not far away are Summer Hill and The Tarn.
When to call us in Longlands
Computers, screens, lighting and people all give off heat. A small office or a busy room can warm up fast with equipment and people in it, even when it isn’t especially hot outside.
Any of these is worth a proper look:
- A home office that warms up with screens and equipment
- An old system that needs replacing
- A business premises that overheats in summer
Eltham Palace, about 2 miles north-west, is one of the historic houses nearby, and if your own home is listed, consent comes before any air conditioning is fixed to it.
What to look for in a quote
- Exactly what the price includes, from supply and fitting to commissioning
- Whether they hold F-Gas company certification, not just individual qualifications
- The make and model of any parts or equipment being quoted
Looking after it afterwards
Here’s the after-treatment advice, in brief:
- Close windows and doors while the system is cooling
- Use moderate settings for comfort and economy
- Refit filters properly after cleaning
Commissioning is the last stage: every mode is tested before we go. Once it’s running properly, we take you through the controls and settings, so you are confident using it.
Regular filter cleaning is the simplest thing you can do. Blocked filters cut airflow and make the system work harder, so it uses less electricity for the same comfort.
What happens on the day
Testing is the last part of the visit wherever the system can be switched on. Then we show you what we have done and answer any questions, and anything that needs a follow-up is pointed out there and then. The visit takes a day or more, depending on the number of rooms, the pipe routes and the access. A note on parking and access helps us plan a visit to Longlands.
- Diagnosis comes first, with a survey of the rooms, outside space and fuse board.
- Next, a recommendation for each room and a fixed price.
- Then the work: units up, pipes and drain run, and a new circuit where necessary.
- Checks: a pressure test for leaks, then a vacuum to clear moisture.
- Finally, the clean bill of health: commissioning, the controls explained and your paperwork handed over.
Before we arrive
- Clear a path to the units and the space around them
- Unlock any gate, garage or side passage we need
- Tell us about any building rules, permits or sign-in
How to get a quote
Photos are enough for some jobs; others need a visit first. Bigger systems, commercial sites and awkward pipe routes are normally surveyed on site. Either way, you get a fixed price before any work is booked.
Read more
Why it’s worth doing now in Longlands
The best time to plan air conditioning is before the hot weather, not during it. A rushed choice is often the wrong size or in the wrong place, which is costly to undo. Booking the survey early gives you time to weigh up the options. Consents in London blocks can take time, which is another reason to plan the job in Longlands early.
Several rooms, units or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at, and you will get one fixed price.
Why us?
- MCS certified heat pump installers
- Checkatrade member
- One contact for properties across the South East and London
- NICEIC approved for electrical work
Read what air conditioning costs and how to check a contractor.
From one of our customers
“Very professional from the initial survey through to installation. The engineer explained everything clearly and the quote was exactly what we paid. Would not hesitate to recommend AirCon Doctor.”
David W., Haywards Heath