... capacity: 4+ production lines. 300,000 pcs / year.*Quality management system: ISO9001Specification: 1.Portable air heater2. Function on propane gas (LPG ... and factories Application Field:1, Industial field-constructing site, workshop, warehouse, garage etc.2, Agriculture field-vegetable greenhouse, fruit and ... etc.3, Stock raising field-chicken house, duck house, etc. warehouse gas-fired space heater