Tel: 01278 761 200
Tel: 01793 726 666
Alde Options Dongle Many of the advanced features of the Alde 3020 Compact HE system require the extended connectivity of the options dongle. The Alde options dongle connects to the boiler, and allows operation of dedicated UFH pump, minibooster fan convector, engine pre-heat pump, LPG cylinder interface and Alde Flow continuous hot water.