Air Conditioning & Air To Air Source Heat Pumps

4 Seasons Solution's team of air conditioning engineers specialise in installing effective air conditioning systems - or air to air source heat pumps - for homeowners, builders, architects and commercial premises. 

We design, supply and install efficient, bespoke systems designed to meet all of your requirements while reducing energy consumption by up to 35%. Based in Exeter, we serve clients across the South West.

Our service doesn't stop with the installation though, as our air conditioning engineers are always on-hand to improve, maintain or appraise your new or existing air con system.

As part of the Government initiative we can supply and install domestic air to air source heat pump / air conditioning systems with ZERO VAT! Please contact us to find out more.




Whatever you're looking for, our air conditioning engineers will find it for you. We're completely impartial and not affiliated with any single manufacturer or supplier. That means that our engineers have free reign to weigh up your needs and requirements against the costs and benefits of any air conditioning system or components.

Once we know what you're looking for, we'll create a custom commercial or domestic air conditioning system, along with a bespoke installation plan to ensure that any work is completed quickly. This minimises costs, and the disruption to your home or business.

We operate throughout Exeter, Devon and the South West - so when you need a quote, we're only a phone call away.



If you want to continue getting the most out of your air conditioning, you'll need regular maintenance and servicing.

Our engineers are on-hand to help out.

All of the air con systems we supply are subject to a minimum of a one year parts and labour warranty – but if you want the very best results over a sustained period, we offer 7 year warranties alongside our regular maintenance packages.

So if you need an air conditioning engineer to keep your home or workplace cooler for longer, get in touch today.

Free No Obligation Survey and Quotation

Available in Devon and the South West.

No longer just white boxes!

Air Conditioning & Air to Air Source Heat Pumps are no longer just white boxes! Tailor made solutions for both domestic & commercial installs includingInvisible ducted, multi-room from one AC unit, Web & App control, along with Stylish wall mounts available in Charcoal, Brushed Silver, Red, Black and Gloss White.


How Air Conditioning Works

The principle of air conditioning always comes down to the same: absorb energy in one place and release it in another place.

The process requires an indoor unit, an outdoor unit and copper piping to connect both. Through the piping the refrigerant flows from one unit to another. It is the refrigerant that absorbs the energy in one unit and releases it in the other.

Like many of the best ideas, air source heat pump technology is simple at its heart.

During the day the sun's rays heat up the air. Heat pump technology simply extracts this free energy. Even at ambient temperatures below -10°C there is enough heat in the atmosphere for an air to air heat pump to heat your home.

The only additional energy the system requires is the power to drive the heat pump compressor. In fact, if the heat pump is connected to a clean energy source, such as solar power (ask for further details), running costs and CO2 emissions can be reduced even further.

Air to Air source heat pumps are an excellent replacement for existing electric heating systems such as storage heaters, panel heaters or when existing radiator pipe work isn’t available. There also great at adding an efficient heating source to individual rooms such as a conservatory.

Heats as well as cools

1: Indoor unit
A fan blows the hot indoor air over a heat exchanging coil through which cold refrigerant flows. The cold refrigerant absorbs the heat from the air and cooled air is blown into the room.

2: Copper piping
The refrigerant circulates through the units and the piping and takes the heat from the indoor unit to the outdoor unit.

3: Outdoor unit
Through compression, the refrigerant gas is heated and its boiling point increases. In the outdoor unit the obtained heat through compression is released to the outdoor air by means of a fan which blows the outdoor air over a heat exchanging coil.

4: Refrigerant
The liquid refrigerant flows back to the indoor unit.

5: Indoor unit
Back in the indoor unit, the refrigerant is decompressed and thus enabled to extract heat form the indoor air.


Air Conditioning Gallery

Common Questions

On the same principles as a refrigerator but split into two parts. The indoor unit acting like the cold plate inside a fridge and the outdoor unit acting like the warm pipes on the back. Heat is transferred between the two units using a compressor to circulate refrigerant.

A split system is the description given to a system that is split into two parts indoor and outdoor unit. (Unlike a portable unit).

A multi-split system is where several indoor units are piped separately to one outdoor unit. (Usually between two and four units)


"It is early days yet but we are really happy with our installation, Jerry made a very neat job on the wiring and installation of the inverter and the panels look and fit well on the roof. Gareth you were the only one to suggest installing the inverter in the garage where it is both cooler and far easier to maintain if it were ever necessary and played a part in our decision to go with 4SeasonsAC.

The buying from you was easy with your transparent all inclusive pricing policy and top name brand equipment, we are sure you and your team are going to do very well in the PV and micro generation world. Very happy to be a reference installation should you wish. Thanks again."

 Richard Grey

"Many thanks Gareth for the painstaking effort you went to ensure the system was suitable for our use. The team worked exceptionally quick in order to beat the pending bad weather. They were thorough, professional and even cleared up after themselves. Once again many thanks and we would have no hesitation in recommending your services to other interested parties."

Jean and Philip Giovanovits

Free No Obligation Survey and Quotation

Available in Devon and the South West.