- A technical resource for dealers, technicians and owners of Hearthstone stoves
| Production Run | Dates | Serial Numbers | Notes |
|---|---|---|---|
| Start Rev. 0.1 | 1984 | Electronic air control Implemented comprehensive warranty | |
| Rev. 0.1 | 1985 | Manual air control | |
| Rev. 0.2 | 09/88 | Catalytic combuster | |
| End | 06/90 | 006137 |
