It depends on your space, layout, noise preferences, and design goals. Most homes suit wall-mounted or multi-split systems, while offices and larger projects often use cassette, ducted or VRF/VRV-style systems.

Yes. We install concealed ducted systems and carefully route pipework for a clean finish—ideal for high-end homes, apartments and premium office interiors.

Many residential installs can be completed in 1 day per system. Larger commercial installations depend on access, system type, number of indoor units and project scope.

Yes. More UK homes and businesses are installing air conditioning for comfort in summer and efficient heating in winter. Modern systems are quiet, energy-efficient and can improve temperature control year-round.

Yes. We diagnose and repair common faults such as poor cooling/heating, leaks, error codes, unusual noises, and low airflow.

Many systems last 10–15 years with good maintenance. If your system is approaching 10 years old and repairs are frequent or costly, a survey can confirm whether replacement is the better long-term option.

Signs include odours, reduced airflow, leaks, unusual noises, poor temperature control, or increased humidity. Regular servicing keeps systems efficient and helps prevent breakdowns.

We don’t recommend DIY servicing because it can cause damage or miss safety and compliance checks. A professional service ensures performance, hygiene, and manufacturer requirements are met.

Most domestic systems benefit from an annual service. Commercial systems are often serviced twice per year depending on usage and compliance requirements.

Yes. Modern air conditioning systems are heat pumps, so they can provide efficient heating in winter as well as cooling in summer.

To learn more about running costs and efficiency, read our guide on the cheapest way to heat a room in the UK.

COP (Coefficient of Performance) shows how efficiently a heat pump turns electricity into heat e.g. a COP of 4 means you can get roughly 4kW of heat from 1kW of electricity.

In many cases, it can be. Air conditioning heat pumps are very efficient and can produce several units of heat for every unit of electricity used. Real-world costs depend on your tariffs, insulation and how you use the system.

Yes. Heat pump air conditioning is designed to provide reliable heating in winter as well as cooling in summer. It’s especially effective for bedrooms, home offices and well-insulated spaces.

Costs vary by system type, number of indoor units, access, and pipe runs. We recommend a free site survey so we can specify the best solution and give a clear, fixed quote.

Yes. We can offer up to 10-year manufacturer warranties (subject to brand and servicing requirements), plus our workmanship cover as agreed in your quotation.

It depends on the unit size, energy efficiency rating, your electricity tariff and whether you’re heating or cooling. During a survey, we can estimate likely running costs based on your room sizes and usage.

Not necessarily. When used for heating, modern air conditioning works as a heat pump and is often more efficient than standard electric heaters. Costs depend on insulation, set temperature and electricity rates.

Yes. Our engineers are F-Gas certified and work is carried out to current UK regulations and manufacturer standards, including correct commissioning and record keeping where required.

Some installations may require permission depending on location, building type, and placement of outdoor units. We can advise during your survey to ensure the installation is compliant.

Outdoor units need good airflow and should be positioned to minimise noise and visual impact. During our survey, we recommend the best placement based on access, pipe routes and local considerations.

Modern systems are designed to be very quiet, and many have night modes to reduce sound even further. We can recommend low-noise options for bedrooms and sleep-sensitive areas.

Evergreen Air Conditioning installs air conditioning systems across London for commercial and residential properties, including design, supply, installation and aftercare for projects of all sizes.

Yes. We install commercial air conditioning across London for offices, corporate HQs and fit-out projects, with options including VRF/VRV, split and multi-split, cassette and ducted systems.

Yes. We deliver large commercial and high-end residential projects, including office fit-outs, hospitality and multi-unit developments with scalable, compliant solutions.

Yes. We install discreet residential air conditioning across London, including concealed ducted systems and quiet bedroom solutions designed to complement high-end interiors and apartment layouts.

Yes. Modern air conditioning systems are heat pumps, so they can provide efficient heating in winter as well as cooling in summer, making them a practical year-round solution in London.

Air conditioning installation costs in London depend on the size of the space, the system type (split, multi-split, cassette or ducted), access requirements and the number of indoor units. We provide a free site survey and no-obligation quote to recommend the best option for your property.

We cover Greater London, including Westminster, Camden, Kensington & Chelsea, City of London, Islington, Southwark, Lambeth, Wandsworth, Hammersmith & Fulham, Ealing, Hounslow, Brent, Hillingdon, Harrow, Barnet, Enfield, Hackney, Tower Hamlets, Newham, Redbridge, Greenwich, Bromley and Croydon.

Evergreen Air Conditioning installs air conditioning across Hertfordshire for homes and businesses, including design, installation, servicing and repairs. Learn more about our air conditioning services in Hertfordshire.

Yes. We install discreet residential systems in Hertfordshire, including quiet bedroom setups and solutions that suit period homes and modern builds.

Yes. We provide one-off servicing and planned maintenance in Hertfordshire to keep systems efficient, improve air quality, and support warranty requirements.

Evergreen Air Conditioning installs air conditioning systems across Cambridgeshire for homes and businesses, including design, supply, installation, servicing and repairs.

Yes. We provide air conditioning installation across Cambridgeshire, recommending the most suitable system for your space, whether that’s wall-mounted, multi-split, cassette or concealed ducted air conditioning.

View our Air Conditioning in Cambridgeshire page for installation, repairs and maintenance.

Yes. We install quiet, discreet systems for homes (bedrooms, home offices and living spaces) and scalable solutions for commercial sites such as offices, retail, hospitality and education settings.

Yes. We offer diagnostics, repairs, one-off servicing and planned maintenance in Cambridgeshire to keep systems efficient, reliable and compliant, while helping protect manufacturer warranties.

Yes. Modern air conditioning systems are heat pumps, so they can provide efficient heating in winter as well as cooling in summer making them a practical year-round solution.