Aircon — no outdoor unit
Wall mounted air conditioner without outdoor unit.
Water-cooled air conditioning for London flats, listed buildings, mansion blocks and conservation areas across Notting Hill, Kensington, Chelsea, Westminster and Paddington. Full heating and cooling with no external condenser and no façade works.
The problem
Why apartment AC is different
Installing air conditioning in a London flat isn't the same as fitting a system in a house. Leasehold rules, planning restrictions and shared spaces mean a standard split unit is rarely an option.
No outdoor unit allowed
Leaseholders, freeholders or planning rules often forbid wall-mounted condensers on façades and balconies.
Listed & period buildings
Mansion blocks and conservation areas restrict any visible external alteration.
Noise restrictions
Shared light-wells and courtyards mean traditional split units can breach noise rules.
Limited space
Small flats need compact, low-profile indoor units that don't dominate the room.
The solution
Water-cooled air conditioning — AC with no external unit
For London apartments where a standard outdoor condenser is refused, the answer is a wall mounted air conditioner without outdoor unit. Our systems are powered by the Parkair MCW 2.0 water/air heat pump — a proven technology that delivers full heating, cooling and dehumidification with zero outdoor condenser, no façade holes and no visible external works. Ideal for listed buildings, mansion blocks and conservation areas across Kensington, Chelsea, Westminster and Notting Hill.
- Water-cooled AC — zero outdoor condenser, zero façade works
- AC with no external unit, concealed in cupboards or false ceilings
- Powered by the Parkair MCW 2.0 water/air heat pump
- Multisplit setups serving up to 5 rooms from one indoor module
- Heating, cooling and dehumidification in one quiet system
- R32 inverter technology — A+++ energy efficiency
- Fully compliant with leasehold and planning restrictions
Why choose us
Apartment AC done right
Energy efficient
A+++ inverter heat pump keeps running costs low all year round.
Silent operation
Quiet enough for bedrooms, studies and open-plan living areas.
F-Gas certified
Fully certified install — safe, compliant and warranty-backed.
No façade works
No external pipework, no wall holes, no planning headaches.
Case study
Listed mansion block, Chelsea — cooling installed with zero façade works
A three-bedroom apartment in a Grade II listed Chelsea mansion block needed cooling for the main bedroom, living room and home office. The freeholder had already refused two proposals from other installers because both required outdoor condensers on the rear elevation — a non-starter in the conservation area.
We surveyed the flat, mapped a discreet route for the water pipework through an existing service void, and specified a Parkair MCW 2.0 water/air heat pump concealed in the utility cupboard, feeding three low-profile indoor units. No external condenser, no façade holes, no planning application required.
Install and commissioning took four working days, with F-Gas certification and full leaseholder documentation issued on handover. The client now has quiet A+++ heating, cooling and dehumidification across all three rooms — and the freeholder approved the design on first submission.
Similar projects delivered across Kensington, Belgravia, Mayfair and Notting Hill.
Frequently asked
Aircon for apartments — FAQ
Can I install AC in a listed building in Westminster or Kensington?
Yes. Because water-cooled systems like the Parkair MCW 2.0 have no outdoor condenser and no façade alterations, they're typically approved in listed buildings, conservation areas and mansion blocks across Westminster, Kensington and Chelsea where standard split units would be refused.
How quickly can you install air conditioning during a London heatwave?
We book free surveys within 24 hours during heatwave weeks and issue a fixed quote the same day. Typical installation is scheduled within a few working days for single-room jobs and 1–2 weeks for multi-room water-cooled setups, subject to parts availability.
Can I have air conditioning in a London flat without an outdoor unit?
Yes. Water-cooled systems like the Parkair MCW 2.0 deliver full heating and cooling without any external condenser, making them ideal for apartments where outdoor units are restricted.
Will my leaseholder approve invisible aircon?
Most leaseholders approve invisible AC because there are no façade alterations, no external pipework and no noise impact on neighbours. We can provide technical specs to support your application.
How much does aircon for an apartment cost in London?
Costs depend on the number of rooms and the system chosen. A single-room invisible AC install typically starts from £4,500, and a multi-room setup from £7,500. We give a fixed quote after a free home survey.
Air conditioning brands we install & service
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Want aircon in your London apartment?
Free survey for flats across Kensington, Chelsea, Westminster, Mayfair, Belgravia and central London.