Underfloor fan coil units

Underfloor fan coil units (FCUs) are positioned beneath the floor, typically in a raised access floor void, where they provide heating and cooling for the space above. They are ideal for commercial buildings with limited wall or ceiling space.

For more information about underfloor fan coil units, contact us today.

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What are the most common types of underfloor fan coil units?

Underfloor fan coil units are typically installed under the raised floors of commercial buildings, where using both the ceiling and the floor void may not be possible due to spatial constraints, or a design preference. Ability by Dimplex has a range of underfloor FCUs that are suitable for selection.

Ability EVO underfloor fan coil units

The Ability EVO range comprises of compact fan coil units that are designed to be situated in concealed spaces, either in suspended ceiling voids or beneath the floor, where they become underfloor fan coil units. Featuring EC motors, optimised coils and an array of filter options, they are available in a choice of unit depths ranging from 155 to 270mm and numerous width options to suit the design parameters of underfloor spaces. Every EVO unit is equipped with high-efficiency heat exchange coils configured to maximise both cooling and heating output. Each coil is specifically tuned to the unit it is paired with, ensuring optimal performance.

Ability Matrix underfloor fan coil units

The Ability Matrix fan coil unit is a high-efficiency, configurable horizontal chassis unit ideal for underfloor applications. It incorporates multiple energy efficient EC/DC fans, each with its own supply plenum, enabling precise control of air volume at each grille and reducing commissioning time. These underfloor fan coil units also feature self-balancing capabilities, which can help to minimise maintenance requirements. The units are designed for full controllability and are typically managed via a building’s BMS. They can also be fitted with redesigned coils so they can work with modern heat pump systems for improved energy efficiency.

EVO155	SINGLE INLET FAN 5 ROW COIL
EVO170	HOTEL SPEC UNIT, SINGLE INLET FAN 5 ROW COIL, SIZE 100 only
EVO235	133 FAN 5 ROW COIL
EVO235R	133 FAN 5 ROW COIL, extended discharge plenum with 70mm acoustic treatment
EVO270	133 FAN 4 ROW COIL
EVO270R	160 FAN 4 ROW COIL, extended discharge plenum with 70mm acoustic treatment
EVO270P	160 FAN 4 ROW COIL
MAT235	SELF BALANCING 133 FAN 5 ROW COIL, MATRIX PLENUM
MAT235MR	SELF BALANCING 133 FAN 5 ROW COIL, MATRIX PLENUM
MAT270	SELF BALANCING 133 FAN 4 ROW COIL, MATRIX PLENUM
MAT270MR	SELF BALANCING 133 FAN 4 ROW COIL, MATRIX PLENUM

Benefits of Ability underfloor fan coil units

Compact size – underfloor fan coil units are designed to be compact to fit into the shallow voids under raised floors to help maximise room space.
Complements interior design – offer HVAC solution for spaces with glazed facades or other design layouts where radiators are not a desirable solution.
Good partner for underfloor heating – underfloor fan coils work well with underfloor heating to deliver comfort cooling to interior spaces.
Mitigate solar gain – underfloor fan coil units specified around the perimeter of a commercial building can help to mitigate solar gain from large, glazed areas.
Quiet – underfloor fan coil units deliver conditioned air at low noise levels to limit acoustic impact on the commercial space.
Proven range performance – history of outstanding performance in delivering heating and cooling to a variety of projects for over 20 years.
High customisation – underfloor fan coil units from Ability can be customised to meet specific project performance outputs whilst being compact enough to be installed in tight underfloor spaces.
Compatible with renewable technology – deliver effective heating and cooling with low temperature hot water from heat pumps through redesigned fan coil.

Witness testing: Supporting the specification of Ability underfloor fan coil units

At Ability by Dimplex, we carry out comprehensive testing of our underfloor fan coil units at a dedicated facility in our factory in Poole, Dorset. We also offer witness testing, providing clients with complete transparency and confidence in the testing process and results relevant to their project.

Using the client’s drawings, we replicate ductwork layouts, grille locations and other system elements in our testing laboratory. By matching the underfloor fan coil unit selection, the testing results enable specifiers and contractors to validate design choices, confirm compliance with project requirements and fine-tune the fan coil system design before on-site installation and commissioning.

FCU testing includes:

Acoustic testing: Confirms that sound levels meet specification, ensuring the acoustic performance of the installed fan coil units is as expected.
Volumetric performance testing: Verifies airflow, air resistance and pressure drops to streamline fan coil commissioning.
Thermal performance testing: Demonstrates heating and cooling outputs, fan coil performance and condensate management, ensuring the finished design delivers both comfort and efficiency.

All FCU testing is carried out using high-quality, regularly calibrated testing equipment. Once the underfloor fan coil testing is complete, clients receive a detailed report that includes test results, photographs, layout drawings and calibration certificates.