Direct expansion air conditioning systems for comfort cooling and heating. Close control and low temperature cooling including cellar coolers, ceiling cassettes and condensing units for chilled food cabinets. www.marstair.com

Chilled water fancoils including ducted, ceiling cassettes, wall and floor mounted units.  Also heat pump chillers and chilled beam cassettes.  All products suitable for cooling and heating large commercial buildings, hotels etc. www.quartz.co.uk

Dedicated heating air source and ground source heat pumps for residential and small commercial properties, providing energy efficient space and DHW heating. www.heatking.co.uk