AIR CONDITIONING & MVHR SPECIALISTS IN LONDON
Air conditioning installation, repair & maintenance in London.
Survey-led installation, fault-finding and servicing for London homes, flats, offices and commercial buildings.
AIR CONDITIONING INSTALLATION LONDON
Start with the building, not the brochure.
Every installation starts with a site survey: how each room is used, where the indoor and outdoor units can sit, and how pipework, drainage and power will reach them. The details we check are set out in the survey section below.
Residential installation
Bedrooms, living rooms, loft conversions, apartments, home offices, garden rooms and whole-home or multi-room systems.
Commercial installation
Offices, retail, restaurants, hotels, server rooms and multi-zone commercial property.
Which air conditioning system?
The right system depends on room count, available outdoor space, visual priorities, noise, controls and the way the property is used. Wall-mounted splits are common for single rooms. Separate splits give each room independent control but need more outdoor equipment, while multi-splits serve several rooms from fewer condensers. Cassettes and ducted systems can suit larger or more design-sensitive spaces, with ducted units giving a discreet finish where there is suitable ceiling or void space. VRF/VRV becomes relevant on larger multi-zone commercial projects.
Wall-mounted split
Simple, efficient room-by-room solution.
Multi-split
Several indoor units with fewer external condensers.
Ceiling cassette
Commercial and open-plan distribution.
Ducted
Discreet grilles with concealed equipment.
VRF / VRV
Flexible zoning for larger buildings.
No-outdoor-unit options
Worth investigating where external equipment is restricted; suitability must be assessed per property.
Residential air conditioning London
Home installations are as much about comfort and discretion as raw capacity. Whether you need a quiet bedroom unit, cooling for a loft or flat, a home office that stays usable in summer, or a system that heats as well as cools, the equipment must suit the room and the property.
London property considerations
Period properties, flats, limited external space and neighbour sensitivity can all influence outdoor-unit positioning, pipe routes and acoustic considerations. Planning, lease and conservation-area questions are covered further down.
Commercial air conditioning London
Commercial projects need to account for occupancy, operating hours, internal heat gains, future maintenance access and downtime. Office, hospitality, retail and server-room cooling should not be treated as interchangeable applications.
Talk to an engineer
If you already know what you need – a survey, a diagnosis, a repair or a quotation – call or send an enquiry with your postcode, property type and any equipment details you have. For repairs, describe what changed: whether the unit powers up, whether the indoor fan runs, whether the outdoor unit starts, any error code shown, whether water is leaking and whether one unit or several are affected. Photos of the model label and controller are often more useful than a long description of the brand.
Air conditioning repair London
Most repair calls start with a symptom. If you recognise one of these, tell us what you are seeing and an engineer will diagnose the cause on site rather than guessing remotely.
Not cooling or heating
Water leaking
Error code displayed
Weak airflow
Unusual noise or vibration
System trips or switches off
Bad odour
Outdoor unit not running
Intermittent performance
Air conditioning servicing & maintenance London
Whether you need a one-off clean and check on a home system or planned maintenance across multiple assets in a managed building, the visit should match the equipment and how it is used.
One-off servicing
Useful for residential systems, pre-season checks, performance concerns and systems without an existing maintenance arrangement.
Planned maintenance
Structured visits for commercial and managed property, with asset visibility, identified defects and remedial priorities.
Air conditioning maintenance contracts London
For commercial and managed buildings, a maintenance contract should set out the visit frequency, assets covered, reporting, exclusions, reactive call-out arrangements and how remedial work is quoted. A server room or restaurant running long hours needs a different programme from lightly used residential equipment. For larger sites, see our planned maintenance programmes. Larger systems may also need statutory energy inspections, which are separate from routine servicing.
How much does air conditioning cost in London?
Air conditioning servicing and repairs start from £180. The final price depends on the number of units, the fault and any parts needed, and we confirm it before any work goes ahead.
Installation cost depends on the project. The number and size of rooms, system type and capacity, indoor and outdoor positions, pipe route and length, drainage, electrical work, controls, access, ceiling work and making good can all change the price, so we do not quote a single headline figure without seeing the property. The next step is a site survey and a written quotation that sets out exactly what equipment and installation work is included.
When comparing quotes, check what each one excludes. A low headline price may leave out electrical work, pumps, access equipment, making good, controls or longer pipe runs. That does not automatically make it a bad quote, but the exclusions should be visible so you can compare like with like.
REAL COMFORT PROJECTS
Residential work without the stock-photo gloss.
Photos from our own London installations: wall positions, external space, pipe routes and how the equipment sits in the room.
What should an air conditioning installation survey include?
Installation quality is decided before the engineer arrives with tools. The survey should confirm the rooms to be conditioned, make the proposed indoor and outdoor positions clear, identify how pipework and condensate will travel, confirm electrical requirements, maintenance access and the expected finish, and flag any access or making-good issues. If those details are vague at quotation stage, they often become expensive or visually awkward decisions on installation day.
Heat-load assessment
Room area alone is not enough. Large windows, south- or west-facing glazing, roof exposure, occupancy, computers, kitchen equipment and insulation can all change the cooling requirement – server rooms, kitchens and sunny lofts can carry much higher loads than ordinary bedrooms. Oversizing is not a substitute for assessment: an unnecessarily large unit can cycle poorly and distribute air badly.
Pipe runs and condensate drainage
Every split installation needs a route for refrigerant pipework and electrical/control connections. The indoor unit also produces condensate in cooling mode. Where gravity drainage is not practical, a condensate pump may be required. The route affects appearance, sound and future maintenance, so it should be agreed before work starts.
Outdoor condenser position
The condenser needs free airflow, structural support and access for future servicing. It also creates sound and rejects heat, so squeezing it into an enclosed balcony corner or placing it immediately beside a neighbour’s bedroom window can create avoidable problems. London terraces, balconies, lightwells, roofs and close neighbouring windows can make the external position a design decision in its own right: a position that is convenient to install is not automatically the best one to live with.
Electrical requirements
The electrical arrangement depends on the selected equipment and installation. It should be confirmed as part of the scope rather than assumed after the AC equipment has been ordered.
Air conditioning for bedrooms, lofts, flats and home offices
In London homes it is usually particular rooms that overheat. Top-floor flats and loft conversions can become especially uncomfortable after several sunny days because heat builds through roofs and glazing, and they can stay warm after outside temperatures fall. Treating each room as its own comfort problem leads to better decisions.
Bedrooms
Prioritise quiet operation, correct sizing and airflow that does not blow directly across the bed. If the condenser is near a bedroom window, outdoor sound matters too.
Lofts
Account for roof exposure, rooflights, dormers, insulation, limited wall space and potentially longer routes to an outdoor unit.
Flats & apartments
External space, lease conditions, façades, balconies, planning and neighbour noise may influence the solution.
Living rooms
Open-plan layouts, connected kitchens and large glazing create higher loads; be realistic about what a single indoor unit can control.
Home offices
Computers and all-day occupancy create additional heat; low noise and desk position matter.
Garden rooms
Lightweight construction and large areas of glass can create rapid temperature swings in summer and winter.
Office, restaurant, hotel, retail and server-room air conditioning
Commercial air conditioning should be designed around the activity in the building, not simply its floor area. Offices need zoning, quiet operation and controls staff can understand; restaurants combine customer comfort with kitchen heat and long opening hours; hotels need multiple independently controlled zones; shops need equipment that can be serviced without blocking the sales floor; and server rooms need capacity based on equipment load and expected growth, with monitoring and resilience because a failure has higher consequences.
Office AC
Open-plan areas, meeting rooms, occupancy and zoning
Restaurant AC
Kitchen heat, dining comfort and long opening hours
Hotel AC
Guest rooms, common areas and multi-zone control
Retail AC
Trading continuity, lighting loads and customer comfort
Server-room AC
Continuous equipment heat and higher consequence of failure
Managed buildings
Asset visibility, access planning and repeatable maintenance
REAL COMFORT PROJECTS
The practical side of a polished installation.
External units, access, routing and commissioning are part of the finished job too.
Air conditioning repair: what the symptoms can tell you
Air conditioner running but not cooling
Confirm the controller is in cooling mode and the set temperature is below room temperature. Beyond that, do not assume the system simply needs refrigerant: dirty filters, airflow problems, control or sensor faults, icing, outdoor-unit faults and refrigeration problems can all produce poor cooling. Continually lowering the set point does not fix a mechanical or refrigeration fault – the cause should be diagnosed before parts or refrigerant are added.
Water leaking from the indoor unit
Water can be associated with blocked or poorly routed condensate drainage, pump failure, icing or installation issues. If the leak could reach electrics or damage finishes, stop the system and arrange inspection rather than letting it keep dripping. If it is safe to do so, note whether the leak only appears in cooling mode, whether you can hear a pump and whether the unit has recently iced – but do not remove electrical covers to investigate.
Air conditioner not turning on
Check the obvious user controls and whether power is available. A breaker that trips repeatedly, a fault code or a system that immediately shuts down is a warning, not something to keep resetting. Note the exact error code and model number, and avoid repeated resets that can hide an intermittent fault. If the indoor unit runs but the outdoor unit does not, the cause can range from controls to electrical or system faults and needs diagnosing.
Weak airflow
Dirty filters are one possibility, but fan problems, coil condition, duct restrictions and other faults can produce similar symptoms. If filter cleaning does not restore normal airflow, further diagnosis is needed.
Noisy or vibrating AC
A change in sound matters more than the fact that an air conditioner makes some noise. Rattling panels, fan contact, vibration, pump noise and outdoor-unit problems can each have different causes.
Bad smells from air conditioning
Musty odours can point to moisture, contamination or drainage issues. Burning or electrical smells should be treated more urgently and the equipment switched off pending inspection.
What is included in an air conditioning service?
The exact scope depends on system type, condition, hours of use, environment and whether the visit is residential or commercial. A useful service is not simply a visual glance at the unit, and commercial sites may also need asset records and planned remedial work. After the visit you should know whether the system is operating normally and what maintenance is likely to be needed next.
Filters
Inspect and clean or replace as appropriate to the equipment and condition.
Coils & airflow
Look for contamination and conditions that can reduce heat transfer or airflow.
Condensate
Check drainage and pumps where fitted, particularly if there is evidence of leaking.
Controls
Confirm operating modes, set points and obvious control issues.
Outdoor unit
Inspect condition, airflow around the condenser and signs of damage or obstruction.
Performance
Consider whether the system is operating as expected and identify faults requiring separate remedial work.
How often should air conditioning be serviced?
There is no sensible single interval for every installation. A bedroom system used mainly during hot weather has a different duty from restaurant, office or server-room equipment operating for long hours. Environment, manufacturer requirements, occupancy and criticality should inform the maintenance plan.
Air conditioning in flats, listed buildings and conservation areas
London property constraints can affect external equipment. Flats may have lease or freeholder conditions in addition to planning rules; listed buildings and conservation areas can have tighter controls over alterations; and some façades or balconies may not be suitable for a conventional condenser. Rules and local planning context can change, and what applies to one flat may not apply to another building a few streets away, so these points should be checked against the actual property and proposed position before equipment positions are committed.
Can air conditioning be installed without an outdoor unit?
Internal or no-outdoor-unit air conditioners exist and can be useful where a conventional external condenser is not practical or permitted. They usually still need openings through an external wall, and they are not automatically the best substitute for a split system: capacity, sound, room layout and visual impact still need assessing.
Quote a multi-room London installation from one room measurement and a photograph. The route, external position, drainage and electrical scope can change the job completely.
Repair or replace an old air conditioner?
Replacement is not automatically the right answer because a unit is old. Consider the diagnosed fault, repair cost, age, reliability history, refrigerant availability, overall system condition, efficiency, suitability for the space and likely future repair exposure. A repair can be sensible when the fault is isolated and the equipment remains appropriate. Replacement becomes more compelling when failures are repeated, the system is unsuitable or major expenditure would still leave an ageing installation with other weaknesses. Where replacement does make sense, modern controls can also improve usability and zoning.
Air conditioning FAQs
Capacity should be based on heat load rather than floor area alone. Glazing, orientation, roof exposure, occupancy and equipment can materially change the requirement.
Running cost depends on equipment efficiency, set temperature, hours of use, room heat gain and electricity tariff. Correct sizing and sensible controls matter.
Sometimes, if airflow, access, heat rejection, noise, structure, lease conditions and appearance are all acceptable. Enclosed balconies can be problematic.
Restricted airflow and refrigeration faults are among the possible causes. Switch it off if ice is building and arrange diagnosis rather than repeatedly forcing it to run.
Filters, moisture, drains and contamination can contribute. Persistent odours should be investigated and the system cleaned or repaired as appropriate; burning or electrical smells should be treated more urgently.
In principle, existing systems can be assessed and serviced subject to equipment condition, access and the scope agreed after inspection.
Quiet operation, correct capacity and sensible indoor/outdoor positioning are usually more important than choosing a unit by brand alone.
Many modern split systems operate as reversible heat pumps, providing both cooling and heating.
It depends on the property, equipment position and local constraints. The actual address should be checked rather than relying on a blanket answer.
The first step is diagnosis: share the manufacturer, model, fault symptoms and photos if available.
Yes, but glazing and solar gain can significantly increase the load. The system should be sized for actual room conditions.
Ducted systems can create a more concealed finish where there is suitable ceiling or service space. High-wall and cassette units remain visible to different degrees.
Multi-split and larger multi-zone systems can connect several indoor units to outdoor equipment. The exact arrangement depends on the product and project.
Yes. Early coordination can make routes, ceiling integration, electrics and controls easier than adding the system after finishes are complete.
AIR CONDITIONING BUYER GUIDE
Installation details that change the finished result
Two quotations can name similar equipment and still describe very different installations. The difference is often hidden in access, pipe routes, drainage, electrical work, controls and finishing. Before accepting a quotation, understand where the indoor unit will sit, where the condenser will go, how the services will travel between them and what will remain visible when the engineer leaves.
What makes a neat installation?
Neat work starts with route planning. Pipework and cable containment should follow a deliberate path; condensate should have a reliable fall or properly considered pump arrangement; penetrations should be positioned carefully; and equipment should remain accessible for service. The most visually expensive mistake is often deciding the route after equipment has already been mounted.
What should be agreed before work starts?
Working hours, access, furniture protection, drilling, containment colour, external route, drainage, electrical responsibility, making good, commissioning and waste removal should all be clear. Commercial clients should also agree how work will be phased around staff, customers or trading hours.