Ducted air conditioning — where a central unit distributes conditioned air through ductwork hidden in the ceiling or floor void — is less common in UK homes than wall-mounted split systems but is growing in popularity, particularly for new builds and whole-house retrofits. Here is a clear guide to ducted systems in the UK context.
How Ducted Air Conditioning Works
A ducted system has one central indoor unit (typically installed in a ceiling void, loft space or cupboard) that cools or heats a volume of air, which is then distributed through a network of insulated ducts to outlets (typically ceiling or floor diffusers) in each room. Return air is collected through return grilles and brought back to the indoor unit for reconditioning. The outdoor unit is the same type as a split system — a refrigerant-cooled unit outside the building.
Advantages of Ducted Systems
No visible indoor units: The only visible elements in each room are the ceiling or floor diffusers — small grilles that blend with the ceiling finish. There are no wall-mounted units with pipework visible on the walls. For design-conscious homeowners, this is a significant advantage.
Whole-house solution from one system: A single ducted system can serve the entire house. Multiple rooms are cooled simultaneously from one outdoor unit and one indoor unit.
Quieter in rooms: The indoor unit is located in the loft or ceiling void — noise in the living spaces is only the airflow through the diffusers, which is very quiet.
Disadvantages of Ducted Systems
Higher installation cost: Ductwork installation is significantly more labour-intensive than running refrigerant pipework for a split system. Typical installed costs for a ducted system in a 4-5 bedroom house: £8,000-18,000 — compared to £5,000-9,000 for a multi-split covering the same rooms.
Requires accessible ceiling voids or loft space: Ductwork needs to run somewhere. In a house with a usable loft and accessible ceiling voids between floors, this is manageable. In a house without loft space or with solid concrete floors, ducted installation is impractical or extremely costly.
Single-point failure: If the central indoor unit fails, no rooms are cooled until it is repaired.
Zoning limitations: Basic ducted systems cool all rooms simultaneously — you cannot easily cool the bedroom at night without also cooling the rest of the house. Zoned ducted systems with motorised dampers address this but add cost and complexity.
When We Recommend Ducted
Ducted systems make most sense for: new builds where ductwork can be incorporated during construction; whole-house retrofits where the loft is accessible and aesthetics are a high priority; properties where multiple rooms need cooling simultaneously and wall-mounted units would be visually intrusive in each room.
For most UK homeowners wanting to cool 2-4 rooms, a multi-split system is more cost-effective and more practical. Ducted is the right choice when aesthetics are the primary consideration and cost is not the limiting factor.
Cost
Ducted systems for UK homes typically cost £8,000-18,000 for a 4-5 bedroom house — including design, ductwork fabrication, installation and commissioning. Call 07833 053749 or request a free survey.