PORTABLEFORCEDAIR HEATEROWNER'S MANUALHeater Sizes: 40,000 and 60,000 Btu/HrModels: R40, REM40, R60, B60, and REM60H.S.I. SeriesI IMPORTANT: Read and understand this manual before assembling, start- IIing, or servicing heater. Improper use of heater can cause serious injury.IKeep this manual for future reference.