... management system: ISO9001Specification: 1.Portable air heater2. Function on propane gas (LPG)3. With over-heating protection4. Special nozzle, with ... Application Field:1, Industial field-constructing site, workshop, warehouse, garage etc.2, Agriculture field-vegetable greenhouse, fruit and flower greenhouse ... etc.3, Stock raising field-chicken house, duck house, etc. garage gas-fired space heater