JHRS Ltd are ‘F-gas’ qualified and Refcom registered. ‘Air con’ covers a wide range of systems, from ‘simple splits’ where one outdoor unit is connected to a single indoor unit, giving cooling (and heating if required). To large integrated systems where a roof mounted outdoor unit will control numerous indoor units. Fresh air can be ducted into the office, with the air being tempered, either heated or cooled depending on the outdoor temperature.