The KR series of warm air duct furnaces were supplied only to Benson Heating Limited between 1996 and 1998. The units were primarily 'badged' duct furnaces of AmbiRad's ST series 1 range and re-sold by Benson to be used in air handling equipment.
10 models were available, these being:
for further details see ST series 1
The KR ceased supply in 1998.
Few parts are still available. The main items are Venter parts (also known as venter fan; flue fan; dilution fan)
R142480 Venter Motor - all models
R142658 Venter Wheel Impeller - KR100-175
R142659 Venter Wheel Impeller - KR200-400
For all other items, refer to ST-1 section in the UK spares price list