Clarke, Gas Heater, models:

1600DV	User Instructions
DEVIL 1600	User Instructions
DEVIL 4000	Operation & Maintenance Instructions Manual
Devil 1250	Operating & Maintenance Manual
Devil 1250(ss)	Operating & Maintenance Manual
GRH125	Operating & Maintenance Instructions
GRH35	Operation & Maintenance Instructions Manual
Little Devil II	Operation & Maintenance Instructions Manual
MGH1	Operating & Maintenance Instructions